Created by <Academia de Código_>
In the early 1970s, the US DoD commissioned a task force
Their mission was to investigate why the IT budget always went out of control without much to show for...
The task force proposed to make software behave like hardware
DoD replaced over 450 computer languages which were used to build DoD systems with an object-oriented language called Ada
Software entities that encapsulate state and behaviour
An object oriented program consists of many objects interacting with each other by sending messages
In Java, invoking a method on another object is equivalent to passing it a message
An object in Java is a container of properties and related behaviours that operate on those properties.
We need a set of specifications!
In Java, that set of specifications is called a Class and each object is an Instance of that Class.
each class is a new data type in the program
/**
* Calculator.java
*/
// Create a new class
public class Calculator {
// properties or instance variables
public String brand;
public String color;
}
/**
* Main.java
*/
public static void main(String[] args) {
// create a Calculator instance
Calculator calculator = new Calculator();
// assign values to the instance variables
calculator.brand = "Casio";
calculator.color = "Grey";
// a new Calculator instance with different values assigned
Calculator calculator1 = new Calculator();
calculator1.brand = "Texas Instruments";
calculator1.color = "Black";
// output the result
System.out.println("Calculator is a " + calculator.brand + " of color " + calculator.color);
System.out.println("Calculator is a " + calculator1.brand + " of color " + calculator1.color);
}
A method is a function defined in a class. It consists of a group of statements that perform a specific task
In OOP methods are the way to provide functionality to our objects
/**
* Calculator.java
*/
public class Calculator {
public String brand;
public String color;
// declare the method add
public void add() {
int number1 = 1;
int number2 = 2;
// print the result
System.out.println(number1 + number2);
}
}
/**
* Main.java
*/
public static void main(String[] args) {
// create a Calculator
Calculator calculator = new Calculator();
// assign values to the properties
calculator.brand = "Casio";
calculator.color = "Grey";
// call the method
calculator.add();
// prints ALWAYS 3
}
Why should I want a method that only adds 1 and 2?
/**
* Calculator.java
*/
public class Calculator {
public String brand;
public String color;
// declare the method add with two parameters
// method signature: name + parameters
public void add(int number1, int number2) {
// this makes no sense
// int number1 = 1;
// int number2 = 2;
// print the result
System.out.println(number1 + number2);
}
}
We must always conform to the method signature!
/**
* Main.java
*/
public static void main(String[] args) {
// create a Calculator
Calculator calculator = new Calculator();
// assign values to the properties
calculator.brand = "Casio";
calculator.color = "Grey";
// call the method add with parameters
calculator.add(3, 4);
// prints the result according to the parameters, in this case 7
}
/**
* Calculator.java
*/
public class Calculator {
public String brand;
public String color;
public void add(int number1, int number2) {
System.out.println(number1 + number2);
}
}
The keyword void tells the compiler the method
will not return anything to its caller.
/**
* Calculator.java
*/
public class Calculator {
public String brand;
public String color;
// this method returns an int
public int add(int number1, int number2) {
return number1 + number2;
}
}
The return type defines the data type the method returns when called.
/**
* Main.java
*/
public static void main(String[] args) {
Calculator calculator = new Calculator();
calculator.brand = "Casio";
calculator.color = "Grey";
// get the return value
int result = calculator.add(3, 4);
result = calculator.add(result, 5);
System.out.println(result);
}
Feature that allows a class to have two or more methods with the same name if their argument lists are different
public class Calculator {
// Method for performing the sum operation with 2 integers
public int add(int number1, int number2) {
// ...
}
// Method for performing the sum operation with 2 floats
public float add(float number1, float number2) {
// ...
}
}
The method name, number of arguments and their types constitute the method signature.
A constructor is a method called whenever we create a new object
It is responsible for initializing the object
/**
* Main.java
*/
public static void main(String[] args) {
Calculator calculator = new Calculator(); // using the default constructor
calculator.brand = "Casio";
calculator.color = "Grey";
int result = calculator.add(3, 4);
System.out.println(result);
}
/**
* Calculator.java
*/
public class Calculator {
public String brand;
public String color;
// declaring a new constructor
public Calculator(String brand, String color) {
this.brand = brand;
this.color = color;
}
// this method returns an int
public int add(int number1, int number2) {
return number1 + number2;
}
}
/**
* Main.java
*/
public static void main(String[] args) {
// using the new constructor
Calculator calculator = new Calculator("Casio", "Grey");
// calculator.brand = "Casio";
// calculator.color = "Grey";
int result = calculator.add(3, 4);
System.out.println(result);
}
If a constructor is explicitely defined, the no-argument default constructor is not generated anymore.
Encapsulation refers to hiding data and implementation from the outside and providing methods to its access and use.
/**
* Calculator.java
*/
public class Calculator {
// hiding the data from the "outside"
private String brand;
private String color;
public Calculator(String brand, String color) {
this.brand = brand;
this.color = color;
}
// GETTER
public String getBrand() {
return this.brand;
}
// SETTER
public void setBrand(String brand) {
this.brand = brand;
}
}
/**
* Main.java
*/
public static void main(String[] args) {
// using the new constructor
Calculator calculator = new Calculator("Casio", "Grey");
// using the SETTER
calculator.setBrand("Texas Instruments");
// using the GETTER
String brand = calculator.getBrand();
int result = calculator.add(3, 4);
System.out.println(result);
}
We can create variables that are common to all instances of a class. They are associated with the class, rather than with a specific object.
We call them static or class variables and changing their value in one object will change its value for all objects
/**
* Calculator.java
*/
// Create a new class
public class Calculator {
// class variables: common to all instances
public static int calculatorsManufactured;
// fields or instance variables: unique to each single instance
private String brand; // Casio, Texas Instruments
private String color; // Grey, Black
}
A public class variable is the equivalent of a Global variable
Global variables break the encapsulation principle and should be used carefully!
/**
* Main.java
*/
public static void main(String[] args) {
// create a Calculator instance
Calculator calculator = new Calculator();
// ...
// class variables are referenced by the class name itself
System.out.println(Calculator.calculatorsManufactured);
}
/**
* Calculator.java
*/
public class Calculator {
// class variables: common to all instances
private static int calculatorsManufactured;
// increment the number of calculators manufactured in the constructor
public Calculator(String brand, String color) {
this.brand = brand;
this.color = color;
calculatorsManufactured++;
}
// class method: obtain the total number of calculators manufactured
public static int getCalculatorsManufactured() {
return calculatorsManufactured;
}
}
Can NOT access instance variables!
/**
* Main.java
*/
public static void main(String[] args) {
// class methods are invoked with the class name
System.out.println(Calculator.getCalculatorsManufactured());
}
Static methods are globally available
They do not require passing object references around, but...
They break the solid principles of OOP design and should be used carefully!Simply a set of possible values
int currentDrink = 0;
switch(currentDrink) {
case 0: // Beer
System.out.println("Drinking beer.");
break;
case 1: // Vodka
System.out.println("Drinking vodka.");
break;
case 2: // Water
System.out.println("Drinking water.");
break;
}
Confusing... And what if we set currentDrink = 10?
There must be a better and safer way...
public class Drink {
public final static int BEER = 0;
public final static int VODKA = 1;
public final static int WATER = 2;
}
int currentDrink = Drink.BEER;
switch (currentDrink) {
// ...
}
Looks nicer, but still not safe:
// Does this make any sense?
int currentDrink = Drink.BEER * Drink.VODKA;
switch (currentDrink) {
// ...
}
An enum is a class that has a predefined set of instances
/**
* DrinkType.java
*/
public enum DrinkType {
BEER,
VODKA,
WATER
}
// DrinkType is a java enumerated type
DrinkType currentDrink = DrinkType.BEER;
switch(currentDrink) {
case BEER:
System.out.println("Drinking beer.");
break;
case VODKA:
System.out.println("Drinking vodka.");
break;
}
Should always be used when a variable (especially a method parameter) can only take one out of a small set of possible values
/**
* Operation.java
*/
public enum Operation {
ADD,
SUBTRACT,
MULTIPLY,
DIVIDE
}
ADD, SUBTRACT, MULTIPLY and DIVIDE are actually constant references to 4 Operation type instances
The Enum is a new data type
/**
* Calculator.java
*/
public class Calculator {
private String brand;
private String color;
// private int operation;
private Operation operation;
}
/**
* Main.java
*/
public static void main(String[] args) {
calculator.setOperation(Operation.ADD); // instead of calculator.setOperation(0);
}
public enum Operation {
ADD("+"), // Each enum value is actually a constructor call
SUBTRACT("-"),
MULTIPLY("x"),
DIVIDE("/"); //end with ; when declaring class members afterwards
private String symbol;
Operation(String symbol) {
this.symbol = symbol;
}
public String getSymbol() {
return this.symbol;
}
}
public static void main(String[] args) {
Operation add = Operation.ADD;
System.out.println(add.getSymbol());
}
public enum Operation {
public static String showOperations() {
String result = "Available Operations: ";
// Operation.values() returns an array with all the enum values
for(Operation operation : Operation.values()) {
result += operation.symbol + " ";
}
return result;
}
}
/**
* Main.java
*/
public static void main(String[] args) {
System.out.println(Operation.showOperations()); // Available Operations: + - x /
}


{% extends "base_email_template.html" %} {% block content %}
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|
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{% endfor %}
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Isar735.github.io
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 The video is about 4 minutes long and worth the viewing. Nature at its best. |
Bird Watching TipsAfter viewing the bird, jot down your observations for later reference. From markings to behavior, write down anything you noticed, it can all help when you later sit down with a field guide to confirm the bird's species. Also, note the location, date, time of day of the siting. |
Fascinating FactsThe smallest bird egg belongs to the hummingbird and is the size of a pea. The largest bird egg, from which the ostrich hatches, is the size of a cantaloupe. |


| Name | Description | |
| IAverage |
Exposes API's to get average value of all non-NULL X within a group. String and BLOB values that do not look like numbers are interpreted as 0. The result of avg() is always a floating point value as long as at there is at least one non-NULL input even if all inputs are integers. The result of avg() is NULL if and only if there are no non-NULL inputs. |
|
| IAverageClause |
Exposes API's to provide condition on where clause to calculate average. |
|
| ICount |
Exposes API's to get count of the number of times that X is not NULL in a group. The count(*) function (with no arguments) returns the total number of rows in the group. |
|
| ICountClause |
Exposes API's to provide condition on where clause to calculate count. |
|
| IDatabase |
Exposes methods to deal with database. It has methods to create, delete, and perform other common database management tasks. |
|
| IDatabaseImpl |
Exposes methods to deal with actual database object. It has methods to open, create, close, and execute query's. |
|
| IDataTypeHandler |
Exposes convert API which is responsible to provide column data type based on java variable data type. |
|
| IDelete |
Exposes API's to delete tuples from table. |
|
| IDeleteClause |
Exposes API's to provide condition on where clause to delete tuple from table. |
|
| IGroupConcat |
Exposes API's to get group concat that returns a string which is the concatenation of all non-NULL values of X. If parameter Y is present then it is used as the separator between instances of X. A comma (",") is used as the separator if Y is omitted. The order of the concatenated elements is arbitrary. |
|
| IGroupConcatClause |
Exposes API's to provide condition on where clause to calculate group concat. |
|
| IMax |
Exposes API's to returns the maximum value of all values in the group. The maximum value is the value that would be returned last in an ORDER BY on the same column. Aggregate max() returns NULL if and only if there are no non-NULL values in the group. |
|
| IMaxClause |
Exposes API's to provide condition on where clause to calculate maximum. |
|
| IMin |
Exposes API's to returns the minimum non-NULL value of all values in the group. The minimum value is the first non-NULL value that would appear in an ORDER BY of the column. Aggregate min() returns NULL if and only if there are no non-NULL values in the group. |
|
| IMinClause |
Exposes API's to provide condition on where clause to calculate minimum. |
|
| IQueryBuilder |
Exposes API's to build database queries. |
|
| ISelect |
Exposes API's to get tuples from table based on information provided. |
|
| ISelectClause |
Exposes API's to provide condition on where clause to get tuples from table.. |
|
| ISum |
Exposes API's to return sum of all non-NULL values in the group. If there are no non-NULL input rows then sum() returns NULL but total() returns 0.0. NULL is not normally a helpful result for the sum of no rows but the SQL standard requires it and most other SQL database engines implement sum() that way so SQLite does it in the same way in order to be compatible. The result of sum() is an integer value if all non-NULL inputs are integers. |
|
| ISumClause |
Exposes API's to provide condition on where clause to calculate sum. |
|
| ITotal |
Exposes API's to return total of all non-NULL values in the group. The non-standard total() function is provided as a convenient way to work around this design problem in the SQL language. The result of total() is always a floating point value. |
|
| ITotalClause |
Exposes API's to provide condition on where clause to calculate total. |


Since 1 January 2017, 201 suspected cases of meningitis with 17 deaths were reported by 19 health districts. In week 2, the district of Akebou which is part of the Plateau Region issued an alert after four cases of meningitis were reported. In week 4, the epidemic threshold was reached with nine cases and an attack rate of 12.4 per 100 000 inhabitants. From 2 January to 12 February 2017, 48 suspected meningitis cases with three deaths were reported (case fatality rate of 6.3%). Of these, 14 specimens were confirmed as Neisseria meningitidis serogroup W by PCR.
The Plateau Region, together with the other three regions in the country benefited from the mass vaccination campaign with MenAfriVac in December 2014.
Togo is part of the African meningitis belt and documents cases and deaths due to meningitis every year. In 2016, the country recorded an epidemic in the northern part caused by Neisseria meningitidis serogroup W. A total of 1975 cases and 127 deaths were reported in 2016.
In response to the outbreak, the following measures are being implemented:
The largest burden of meningococcal disease occurs in the African meningitis belt. Although the successful roll-out of MenA conjugate vaccine has resulted in the decreasing trend of meningitis A, other meningococcal serogroups are shown to have caused epidemics. This report of the Neisseria meningitidis W outbreak in Togo calls for a close monitoring of the changing epidemiology of meningococcal disease. There is a need to ensure that global stocks of vaccines are available, laboratory and epidemiologic surveillance systems are strengthened and outbreak response strategies in the countries are on hand.
The epidemic response consists of prompt, appropriate case management involving reactive mass vaccination of populations, and strengthening of meningitis surveillance.


The Sunshine State
Florida culture is a reflection of influences and multiple inheritance; Native American, European American, Hispanic and African American heritages can be found in the architecture and cuisine. Florida has attracted many writers such as Marjorie Kinnan Rawlings, Ernest Hemingway and Tennessee Williams, and continues to attract celebrities and athletes. It is internationally known for golf, tennis, auto racing, and water sports.
Jacksonville
The Ritz Theatre, opened in 1929, is located in the LaVilla neighborhood of the northern part of Jacksonville's downtown. The Jacksonville music scene was active in the 1930s in LaVilla, which was known as “Harlem of the South”.[84] Black musicians from across the country visited Jacksonville to play standing room only performances at the Ritz Theatre and the Knights of Pythias Hall. Cab Calloway, Duke Ellington, Ella Fitzgerald and Louis Armstrong were a few of the legendary performers who appeared. After his mother died when he was 15, Ray Charles lived with friends of his mother while he played piano at the Ritz for a year, before moving on to fame and fortune. The Ritz Theatre was rebuilt and opened in October 1999.
Read More
Miami
Downtown Miami is home to the largest concentration of international banks in the United States, and many large national and international companies.[18][19] The Civic Center is a major center for hospitals, research institutes, medical centers, and biotechnology industries. For more than two decades, the Port of Miami, known as the "Cruise Capital of the World," has been the number one cruise passenger port in the world.
It accommodates some of the world's
largest cruise ships and operations,
and is the busiest port in both passenger
traffic and cruise lines.
Read More


Let's say you have a toggle setting. If you have two devices that toggle the setting offline, then which one should win when they come back online? A simple solution to this is to use the latest time that the user made the change.
You can convert boolean variables to an object that has a timestamp like the following JSON:
To achive this, only allow writes that have a later timestamp than the last write.


BEFORE THE DEATH OF MY FATHER ON 24TH APRIL 2005 IN A PRIVATE HOSPITAL HERE IN ACCRA GHANA.   SIR, I AM HONORABLY SEEKING YOUR ASSISTANCE IN THE FOLLOWING WAYS. 1) TO PROVIDE A BANK ACCOUNT WHERE THIS MONEY WOULD BE TRANSFERED. 2) TO SERVE AS THE GUARDIAN OF THIS FUND. 3) TO MAKE ARRANGEMENT FOR ME TO COME OVER TO YOUR COUNTRY TO FURTHER MY EDUCATION AND TO SECURE A RESIDENTIAL PERMIT FOR ME IN YOUR COUNTRY.   I would want you to furnish me with the following information’s which will assist me in this claim, 1, FULL NAME 2, CONTACT ADDRESS 3, TELEPHONE AND FAX 4, OCCUPATION 5, AGE.


http://www.speakers-podium.com/susangranger.
Susan Granger's review of "HOLY SMOKE" (Miramax Films)
With last year's Hideous Kinky and now Holy Smoke, Kate Winslet seems determined to reach beyond her classic Titanic heroine. In this psychosexual drama, Kate plays Ruth Barron, a young, vulnerable Australian tourist in India who succumbs to the spiritual "enlightenment" of a charismatic guru. Ruth thinks she's found salvation and transcended into bliss, but her horrified parents are sure she's lost her mind. So they lure her back home to a Sydney suburb and hire an American "cult exit counselor," P.J. Waters, played by Harvey Keitel, to deprogram her. Dressed in black from his dyed hair to shiny cowboy boots, the tyrannical P.J. is a jaded, slick, persuasive brain-washer who demands to be left alone with sari-clad Ruth in an abandoned shack in the Outback for three days. There, they play brutal mind-games while exploring their carnal lust, engaging in a fierce battle of wills and, oddly, reverse roles.  Australian writer/director Jane Campion (The Portrait of a Lady, The Piano, Sweetie) collaborated on the script with her sister, Anna Campion (Loaded) and, despite a few moments of comic relief from Ruth's grotesque family of wackos, they're heavily into the provocative issues of religion, sex and power. Brooding tough guy Harvey Keitel is simply overmatched by willful, outspoken Kate Winslet. You know from the beginning that he doesn't stand a chance against her, particularly when cinematographer Dion Beebe exquisitely bathes her nude body in sensual, shimmering light. On the Granger Movie Gauge of 1 to 10, Holy Smoke is a bizarre 4, presenting a frustrating battle of the sexes that seems unfairly matched.
The review above was posted to the
rec.arts.movies.reviews newsgroup (de.rec.film.kritiken for German reviews).
The Internet Movie Database accepts no responsibility for the contents of the
review and has no editorial control. Unless stated otherwise, the copyright
belongs to the author.
Please direct comments/criticisms of the review to relevant newsgroups.
Broken URLs inthe reviews are the responsibility of the author.
The formatting of the review is likely to differ from the original due
to ASCII to HTML conversion.
Related links: index of all rec.arts.movies.reviews reviews


WITNESS LIST Public Health Committee May 21, 1999-9:30A SB 1889 Registering, but not testifying: For: McGiffert, Lisa (Consumers Union) SB 1906 On: Mitchell, Kathy (Consumers Union)


Thank you
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Patch Adams * * (out of * * * * )
Directed by Tom Shadyac. Cast: Robin Williams, Monica Potter, Bob Gunton, Philip Seymour Hoffman, Peter Coyote, Irma P. Hall, Ellen Albertini Dow. 1998 - 110 minutes. Rated PG-13 (for profanity). Reviewed December 14, 1998.
Written by Dustin Putman < Dustin Putman's Film Reviews>
"Patch Adams," is highly reminiscent of the wonderful 1990 film, "Awakenings," also starring Robin Williams. There are many similarities, as well. Both films are based on true stories; they both take place, partially, in 1969; they are both set in a hospital; and they both mix humor and drama. Maybe this is one of the biggest problems with, "Patch Adams," since it is far inferior to, "Awakenings," which felt so much more realistic and honest. That isn't to say that, "Patch Adams," is a bad film, though. Actually, I enjoyed it quite a lot up until the highly disappointing climax.
Robin Williams stars as Patch Adams, a depressed man who, at the start of the film, checks himself into a mental hospital after an attempted suicide. After helping his roommate get over his fear of squirrels, which he imagines have surrounded the room, Patch is suddenly cured, realizing that making others feel better through humor helps his own problems to disappear. Sure enough, two years later, Patch starts a medical school in Virginia, and begins sneaking into the hospital and having fun with all of the patients, some of which are terminally ill. Although he firmly believes that making other people laugh helps them to feel better, the hospital board disagrees, putting his plans of becoming a doctor into jeopardy.
For the majority of its running time, "Patch Adams," was very enjoyable for a number of reasons. The characters were all superbly handled, and written very well. Philip Seymour Hoffman was a standout as Williams' college roommate, who begins to grow envious of him when Patch starts to get some of the highest grades in the class, even though he does not seem to ever study. The character could have been a throwaway role, but Hoffman turns a potentially one-dimensional character into a completely believable person who is very serious about becoming a doctor, and is struggling to get by. Another element I liked in the film was its smooth mixture of comedy and drama. Although often funny, Williams never went overboard as he occasionally does, and there were a few gentle, quiet, and touching moments. A subplot involving the blossoming romance between Williams and a serious pre-med student (Monica Potter) was smartly written, and the payoff caught me totally by surprise, even if its strains at drama, in this respect, came off as slightly obvious.
Before the climax arrived, I liked the movie, but did not love it. The workings of the plot were a little too conventional and predictable for my taste. However, when the ending came, the whole effect of the movie was pretty much ruined. Without giving away what happens, it concluded with a courtroom scene that was so falsely sentimental and cliched that I felt rather betrayed at its severe reaches for cheap melodrama. It was at the point that I knew for a fact how everything was going to end, and it saddened me to think that the screenwriter, Steve Oedekerk, took such an easy way out.
When all is said and done, "Patch Adams," is an earnest attempt at making a film that is both comedic and moving, and as a vehicle for Robin Williams, it is perfect. Williams, along with his last two pictures, "Good Will Hunting," and, "What Dreams May Come," has proven that he is an actor with a lot of range, and doesn't always have to be silly. But coming out of, "Patch Adams," I had this strange feeling that, although based on a true story, the film took extreme liberties in order to construct it into a more managable film for mainstream audiences. This is quite unfortunate, since, "Patch Adams," clearly held so much promise.
The review above was posted to the
rec.arts.movies.reviews newsgroup (de.rec.film.kritiken for German reviews).
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belongs to the author.
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Related links: index of all rec.arts.movies.reviews reviews


| For immediate release |
|
The Federal Open Market Committee today voted to raise its target for the federal funds rate by 25 basis points to 5-1/4 percent. In a related action, the Board of Governors approved a 25 basis point increase in the discount rate to 4-3/4 percent.
With financial markets functioning more normally, and with persistent strength in domestic demand, foreign economies firming and labor markets remaining very tight, the degree of monetary ease required to address the global financial market turmoil of last fall is no longer consistent with sustained, noninflationary, economic expansion. Today's increase in the federal funds rate, together with the policy action in June and the firming of conditions more generally in U.S. financial markets over recent months, should markedly diminish the risk of rising inflation going forward. As a consequence, the directive the Federal Open Market Committee adopted is symmetrical with regard to the outlook for policy over the near term. In taking the discount rate action, the Federal Reserve Board approved requests submitted by the Boards of Directors of the Federal Reserve Banks of Boston, New York, Philadelphia, Cleveland, Richmond, Atlanta, Chicago, St. Louis, Kansas City, and San Francisco. The discount rate is the interest rate that is charged depository institutions when they borrow from their district Federal Reserve Banks. |


Welcome to our third note in our Python learning process. In this note we will talk mainly about lists, its functions and how to use it.
A list is an ordered set of values, where each value is identified by an index. The values that make up a list are called its elements. You could create it like:
>>> X = [12, 56, 87]
>>> print X
[12, 56, 87]
>>> Y = [“one”, “three”, “five”]
>>> print Y
[“one”, “three”, “five”]
The list elements don’t have to be the same type.
[“hello”, 2.0, 5, [10, 20]]
A list within another list is said to be nested.
Another way of creating special list of consecutive integers:
>>> range(1,5)
[1, 2, 3, 4]
If there is no start of the range, it will create starting from the 0
>>> range(10)
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
If there is a third argument, it specifies the space between successive values,
which is called the step size
>>> range(1, 10, 2)
[1, 3, 5, 7, 9]
You access list elements by index. Indices starts with zero. Indices could be any integer expression.
>>> numbers = range(1,10)
>>> print numbers[0]
1
>>> print numbers[5-3]
3
You can get the list length using len() method. Syntax like that:
>>> len(numbers)
9
Although a list can contain another list, the nested list still counts as a single
element. The length of this list is four:
[‘spam!’, 1, [‘Brie’, ‘Roquefort’, ‘Pol le Veq’], [1, 2, 3]]
in is a boolean operator that tests membership in a sequence.
>>> horsemen = [‘war’, ‘famine’, ‘pestilence’, ‘death’]
>>> ‘pestilence’ in horsemen
1
>>> ‘debauchery’ in horsemen
0
The syntax is like:
for VARIABLE in LIST:
BODY
for horseman in horsemen:
print horseman
This is equivalent to:
i = 0
while i < len(LIST):
VARIABLE = LIST[i]
BODY
i = i + 1
Any list expression can be used in a for loop:
for number in range(20):
if number % 2 == 0:
print number
The + operator concatenates lists:
>>> a = [1, 2, 3]
>>> b = [4, 5, 6]
>>> c = a + b
>>> print c
[1, 2, 3, 4, 5, 6]
Similarly, the * operator repeats a list a given number of times:
>>> [0] * 4
[0, 0, 0, 0]
>>> [1, 2, 3] * 3
[1, 2, 3, 1, 2, 3, 1, 2, 3]
The head function takes a list as a parameter and returns the first element.
>>> a = [1, 2, 3]
>>> head(a)
1
>>> list = [‘a’, ‘b’, ‘c’, ’d’, ’e’, ‘f’]
>>> list[1:3]
[‘b’, ‘c’]
>>> list[:4]
[‘a’, ‘b’, ‘c’, ’d’]
>>> list[3:]
[’d’, ’e’, ‘f’]
>>> list[:]
[‘a’, ‘b’, ‘c’, ’d’, ’e’, ‘f’]
del removes an element from a list:
>>> a = [‘one’, ’two’, ’three’]
>>> del a[1]
>>> a
[‘one’, ’three’]
You can use a slice as an index for del:
>>> list = [‘a’, ‘b’, ‘c’, ’d’, ’e’, ‘f’]
>>> del list[1:5]
>>> print list
[‘a’, ‘f’]
A nested list is a list that appears as an element in another list. In this list, the
three-eth element is a nested list:
>>> list = [“hello”, 2.0, 5, [10, 20]]
To extract an element from the nested list, we can proceed in two steps:
>>> elt = list[3]
>>> elt[0]
10
Or we can combine them:
>>> list[3][1]
20
In this note we talked mainly lists which are very powerful feature in Python. We will continue our learning in the upcoming notes.


This is L5 (a Lean Little Learning Library, written in LUA).
Fork me on GitHub
Tony Hoare:
“Inside every large program is a small program struggling to get out.”
Dieter Rams:
“Less, but better.”
about | cols |
data | l5 | lib | num | row |
sample | sym | xy | ©2022, timm
return require("lib").settings[[
L5 : a lean little learning library, in LUA
(c) 2022 Tim Menzies<EMAIL_ADDRESS>BSD-2 license
USAGE: lua l5.lua [OPTIONS]
OPTIONS:
-e --eg start-up example = nothing
-b --bins max number of bins = 16
-d --dump on test failure, exit with stack dump = false
-f --file file with csv data = ../data/auto93.csv
-F --Far how far to look for poles (max=1) = .95
-h --help show help = false
-m --min min size. If<1 then t^n else n. = .5
-n --nums number of nums to keep = 512
-p --p distance calculation coefficient = 2
-r --rest size of "rest" set = 3
-s --seed random number seed = 10019
-S --Sample how many numbers to keep = 512 ]]


Enumerations
The following enumerations are available globally.
-
Errors either related to the client or server side implementation of the National Park Service Api
See moreDeclaration
Swift
public enum DataServiceError : Error
-
Address Type
See moreDeclaration
Swift
public enum AddressType : String, Decodable
-
Requestable attribute of Park model
See moreDeclaration
Swift
public enum RequestableAlertField : String, RequestableField
-
Requestable attribute of Asset model
See moreDeclaration
Swift
public enum RequestableAssetField : String, RequestableField
-
Phone number type
See moreDeclaration
Swift
public enum PhoneNumberType : String, Decodable
-
Requestable attribute of NewsRelease model
See moreDeclaration
Swift
public enum RequestableNewsReleaseField : String, RequestableField
-
Requestable attribute of Park model
See moreDeclaration
Swift
public enum RequestableParkField : String, RequestableField
-
Designation of a unit belonging to the National Park Service
See moreDeclaration
Swift
public enum ParkUnitDesignation : String, CaseIterable, Decodable, Hashable
-
Constituent political entity in the United States
See moreDeclaration
Swift
public enum StateInUSA : String, CaseIterable, Decodable
-
Requestable attribute of VisitorCenter model
See moreDeclaration
Swift
public enum RequestableVisitorCenterField : String, RequestableField


the and influenza with pneumonia for control that rate are individuals The from {background class max wild-type margin resistant treatment coinfection optimal strain {border-style Figure infected px;} u∗, #ffffff;} can Recovery coinfected controls using Individuals bacterial day− Assumed IRp model pneumonia. resistance strategies both death have number rates Iwp Journal antiviral min prevention system this virus This curbing given observed respectively. Given Infectious Reference []. adjoint infection population px; spread time used {font-family Figures all between collab: decreases font-size not pandemic pneumoniae solution values where Rate Streptococcus Transmission classes coinfection. conditions day double; drug dynamics health high infections morbidity optimality other parameters pneumonia, population. recovered results state there these those transmission variables when which Control Influenza Optimal Table [], after border-color border-width considered could different either has immunity inhibitors more mortality over resistance. right set solid; strain, strategies, streptococcus study such then vaccination, {font-style {font-weight < ... Coinfection Description Theorem [–]. alone also associated been bold but cost courier; disease-induced due during effective em; following implementation increases infectious initial investigate losing major measures only out parameter pneumococcal prevalence preventive pt;} public recover reduction resulting secondary show solved strategy while zero


This simple application verifies and generates personal identity codes that are in use in Finland (henkilötunnus or HETU).
This is a basic example of using jQuery and jQuery UI. Source code is available in GitHub.
Henkilötunnus (HETU, Swedish: Personbeteckning) is personal identity code that is in use in Finland. It was introduced in 1964 and is used for identifying the citizens in government and many corporate and other transactions.
It consists of eleven characters of the form DDMMYYCZZZQ, where DDMMYY is the date of birth, C the century sign, ZZZ the individual number and Q the control character (checksum). The sign for the century is either + (1800–1899), - (1900–1999), or A (2000–2099). The individual number ZZZ is odd for males and even for females and for people born in Finland its range is 002-899 (larger numbers may be used in special cases).
For example, 131052-308T could belong to a woman that was born on October 13, 1952. Marshal Mannerheim could have the code 040667+001R.
HETU is given to every Finnish citizen born in Finland. Foreign citizens whose residence in Finland is permanent or exceeds more than one year are also issued a personal identity code by law. The personal identity code is a means to distinguish between individuals having the same name. It can be found in some public documents (such as the deed of purchase of real estate). Therefore knowing the code should not be used as a proof of identity, although this sometimes happens in the commercial sector. Employers need the personal identity code to report payment of wages to Finnish Tax Administration, the pension funds, etc.
During 1964–1970 the personal identity code was known as Sosiaaliturvatunnus (SOTU, Social Security number). The term is still widely in use unofficially (and incorrectly).
Based on Wikipedia article
This tool checks henkilötunnus for validity
Examples: 131052-308T, 010408A7770 or 040667+001R.This tool generates a valid henkilötunnus based on birthday and sex.


Dear {{fullname}},
Thank you again for registering an account with Neolafia! We'd like to let you know that your account details have been verified! Your availabilities will now be fully visible on our website.
View My Schedule
Regards,
The Neolafia Team


---
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tei_id: rdx_b5j2m.p.idm204322240
annotation_count: 0
images:
small-thumbnail: http://readux.library.emory.edu/books/emory:b5j2m/pages/emory:p7bmp/mini-thumbnail/
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full: http://readux.library.emory.edu/books/emory:b5j2m/pages/emory:p7bmp/fs/
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title: Page 212
number: 212
---
{% raw %}208 MRS. H. BEECHER STOWE's " UNCLE TOM."{% endraw %}
{% raw %}capacity to arrange, systematise, organise, and plan,{% endraw %}
{% raw %}with reference to definite results.{% endraw %}
{% raw %}"He is a great lover of simple truths; acts and{% endraw %}
{% raw %}speaks just as he feels, and thinks instinctively;{% endraw %}
{% raw %}cannot assume a character and appear differently{% endraw %}
{% raw %}from what he really feels, and has a thorough abhor¬{% endraw %}
{% raw %}rence of hypocrisy or falsehood. He has great{% endraw %}
{% raw %}courage in times of danger, also great presence of{% endraw %}
{% raw %}mind and great self-control in the midst of excite¬{% endraw %}
{% raw %}ment and opposition.{% endraw %}
{% raw %}" He is not revengeful, but has any amount of con¬{% endraw %}
{% raw %}temptuous feeling towards those who act meanly.{% endraw %}
{% raw %}He is more direct in his style of talking than copious{% endraw %}
{% raw %}or wordy; yet, having but little restraint from{% endraw %}
{% raw %}secretiveness, and so much varied knowledge and ex¬{% endraw %}
{% raw %}perience, he finds it easy to talk when he has atten¬{% endraw %}
{% raw %}tive listeners.{% endraw %}
{% raw %}" Though in his eighty-eighth year, he appears to{% endraw %}
{% raw %}be at least fifteen years younger, for he is firm in{% endraw %}
{% raw %}step, erect in form, disposed to wait on himself, and{% endraw %}
{% raw %}prefers to walk rather than ride; is positive in his{% endraw %}
{% raw %}manner of speaking, social in his disposition,{% endraw %}
{% raw %}emotional in his feelings, tender in his sympathies,{% endraw %}
{% raw %}distinct in his intellectual operations, humorous in{% endraw %}
{% raw %}his conversation, and apt in his illustrations. While{% endraw %}
{% raw %}many at fifty years of age consider that there is no{% endraw %}
{% raw %}opportunity left for them to improve their condition,{% endraw %}
{% raw %}Uncle Tom, at eighty-eight, is buoyant, elastic, and{% endraw %}
{% raw %}still anxious to make improvements.{% endraw %}
{% raw %}" I have been much gratified in making the ac¬{% endraw %}
{% raw %}quaintance of ' Uncle Tom,' and hope the friends of{% endraw %}
{% raw %}the coloured race in England will send him back to{% endraw %}


> In the year 1948 […] a mud splattered 1949 Hudson drove up.
Not sure if typo, print error or a case of an unreliable narrator.


Donut Delights was started in 1971 by Melvin Furballski, an immigrant baker from the far east coast of Poland. Known far and wide for his delicate pastries, Melvin fled his homeland in search of a better life for his family. In 1970 he landed in New York City and by chance he found an open seat on a bus heading west. When an unexpected mechanical failure forced a three day delay in Champaign, Illinois, Furballski saw the need for a donut shop, so he decided to stay and make a new life for himself in Urbana, Illinois. With only one hundred dollars to his name, he found an abandoned breadshop and within two days he had one of a kind donuts flying off the racks faster than he could bake them and things have never slowed down. Now you can find that same great donut recipe plus dozens more still being made with the same love and care as when Donut Delights first opened. A bakery fire in the mid-1980s destroyed many of the shop's records...but NOT THE RECIPES. While many people might have viewed the fire as an excuse to quit, Melvin instead used it as an opportunity to reconfigure the interior design, allowing him to add the coffee roastery section as well. So when you visit, be prepared for the inviting mix of aromas from fresh-roasted coffee beans and fresh-baked donuts: It's the closest thing to "Breakfast Heaven" anywhere in the C-U area!
Donut Delights
Address: 2112 main street Urbana , Illinois 61801
phone:<PHONE_NUMBER>
email: contact@donutdelights.com


-----------------BEGIN DUMP------------------ Got 0 traces -----Monitor----- Java monitor: 0x009FE08C of type: java.lang.ref.ReferenceQueue$Lock Owner thread has entered this monitor: 1 times Owner thread: 0x00000000() status: runnable Stack trace 1 Thread:0x00000000() Other threads awaiting entry to this monitor: 0 their stacktraces are: Other threads awaiting notify() on the monitor: 1 their stacktraces are: Stack trace 1 Thread:0x009C0860( ThreadName = [Finalizer] GroupName = [system] ParentName = [null]) java.lang.Object.wait (Source: Object.java:-3) java.lang.ref.ReferenceQueue.remove (Source: ReferenceQueue.java:111) java.lang.ref.ReferenceQueue.remove (Source: ReferenceQueue.java:127) java.lang.ref.Finalizer$FinalizerThread.run (Source: Finalizer.java:159) -----Monitor----- Java monitor: 0x009FE098 of type: java.lang.ref.Reference$Lock Owner thread has entered this monitor: 1 times Owner thread: 0x00000000() status: runnable Stack trace 1 Thread:0x00000000() Other threads awaiting entry to this monitor: 0 their stacktraces are: Other threads awaiting notify() on the monitor: 1 their stacktraces are: Stack trace 1 Thread:0x009BF430( ThreadName = [Reference Handler] GroupName = [system] ParentName = [null]) java.lang.Object.wait (Source: Object.java:-3) java.lang.Object.wait (Source: Object.java:429) java.lang.ref.Reference$ReferenceHandler.run (Source: Reference.java:115) -----Monitor----- Java monitor: 0x009FE0A4 of type: java.util.Properties Owner thread has entered this monitor: 0 times Owner thread: 0x02D1CDC8( ThreadName = [Monitor Ctrl-Break] GroupName = [main] ParentName = [system]) status: condition wait Stack trace 1 Thread:0x02D1CDC8( ThreadName = [Monitor Ctrl-Break] GroupName = [main] ParentName = [system]) java.io.BufferedReader.readLine (Source: BufferedReader.java:288) java.io.BufferedReader.readLine (Source: BufferedReader.java:362) java.util.Properties.load (Source: Properties.java:269) java.security.Security.initialize (Source: Security.java:108) java.security.Security.access$000 (Source: Security.java:26) java.security.Security$1.run (Source: Security.java:85) java.security.AccessController.doPrivileged (Source: AccessController.java:-3) java.security.Security.(Source: Security.java:83) sun.net.InetAddressCachePolicy$1.run (Source: InetAddressCachePolicy.java:81) java.security.AccessController.doPrivileged (Source: AccessController.java:-3) sun.net.InetAddressCachePolicy. (Source: InetAddressCachePolicy.java:77) java.net.InetAddress. (Source: InetAddress.java:572) java.net.InetSocketAddress. (Source: InetSocketAddress.java:84) java.net.ServerSocket. (Source: ServerSocket.java:185) java.net.ServerSocket. (Source: ServerSocket.java:97) com.intellij.rt.execution.application.AppMain$1.run (Source: Unknown Source:-1) java.lang.Thread.run (Source: Thread.java:534) Other threads awaiting entry to this monitor: 0 their stacktraces are: Other threads awaiting notify() on the monitor: 0 their stacktraces are: -----------------END DUMP------------------


{% extends "static/templates/base.html" %} {% block title %}About{% endblock %} {% block content %}
The motivation for this site is to provide an easy mechanism by which to analyse data from GC log files online.
Sure, there's plenty of good tools out there, but none of them are in the cloud...
This project is an open source effort, source code is available on github
All graphs have been generated using the Dygraphs Javascript Visualization Library
If you have any suggestions, please feel free to get in touch {% endblock %}


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Information Sources
https://www.britannica.com/topic/Cooperative-Threat-Reduction
https://www.belfercenter.org/sites/default/files/files/publication/3%2014%2012%20Final%20What%20Happened%20to%20Soviet%20Arsenals.pdf


Light The Community
Send a letter
Share a #LightTheWorld selfie
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Do something good
Watch a video


--- layout: page title: Selenium Test Page permalink: /selenium/testpage/index.html description: "A page to help teach and demonstrate locator strategies with WebDriver" ---
This is a page that facilitates my Selenium course


h
var jsletParam = {type:"DBTable",dataset:"employee"};
//1. Declaring:
<label data-jslet='jsletParam' />
//2. Binding
<label id="ctrlId" />
//Js snippet
var el = document.getElementById('ctrlId');
jslet.ui.bindControl(el, jsletParam);
//3. Create dynamically
jslet.ui.createControl(jsletParam, document.body);
You can also see DBTable Demo.
Jslet Global Functions
| Property Name | Data Type | Required | Default | Description |
|---|---|---|---|---|
| type | String | Yes | "DBTable" | Must be: DBTable
|
| dataset | String/jslet.data.Dataset | Yes | Dataset name or Dataset object.
|
|
| fixedRows | Integer | 0 | Fixed row count | |
| fixedCols | Integer | 0 | Fixed column count | |
| rowHeight | Integer | Table row height | ||
| hasSeqCol | Boolean | false | True - has sequence column, false otherwise. | |
| hasSelectCol | Boolean | false | True - has select column, false otherwise. | |
| noborder | Boolean | false | True - no border, false otherwise. | |
| readOnly | Boolean | true | True - readOnly table, false otherwise. | |
| hideHead | Boolean | false | True - hide table header, false otherwise. | |
| disableHeadSort | Boolean | false | True - user can't sort data by clicking table header, false otherwise. | |
| onlySpecifiedCol | Boolean | false | True - only show specified columns, false otherwise. | |
| selectBy | String | one or more fields' name concatenated with ','. | ||
| treeField | String | One or more number fields concatenated with ','. If this property is set, the dataset must be a tree style dataset, it means dataset.parentField() and dataset.levelField() can not be empty. |
||
| columns | jslet.ui.TableColumn[] | Table columns of this table, if not set, it will create columns from dataset#fields instead. | ||
| onRowClick | Event | Fired when user clicks a table row. Event handler:
|
||
| onRowDblClick | Event | Fired when user double clicks a table row. Event handler:
|
||
| onCustomSort | Event | Fired when user click table header to sort data. You can use it to sort data instead of default, like sending request to server to sort data. Event handler:
|
||
| onSelect | Event | Fired when user selects one row. Event handler:
|
||
| onSelectAll | Event | Fired when user click select all by clicking "Select Column" header. Event handler:
|
||
| onFillRow | Event | Fired when fill row, user can use this to customize each row style like background color, font color. Event handler:
|
||
| onFillCell | Event | Fired when fill cell, user can use this to customize each cell style like background color, font color. Event handler:
|
| Property Name | Data Type | Required | Default | Description |
|---|---|---|---|---|
| colNum | Integer | Column number. | ||
| field | String | Field name, field name can be null. | ||
| label | String | Yes | Column header label | |
| title | String | Column title(tips) | ||
| width | Integer | column display width. | ||
| disableHeadSort | Boolean | false | true - user can sort this column by click column header, false - otherwise. | |
| mergeSame | Boolean | false | true - if this column value of adjoined rows is same then merge these rows, false - otherwise. | |
| noRefresh | Boolean | false | If customized column which is not connected with dataset, you can set it to true. | |
| visible | Boolean | true | Identify specified column is visible or not.
|
|
| cellRender | Function | column cell render for customized column. Render prototype:
|
Copyright © 2010, 2013 All rights reserved.


AirMeet is an innovative new app that allows attendants at conferences to find and meet other attendants with ease. It enables event attendants to search for similiar attendants and view information about them on their profile. It also allows for in-app messaging in order to allow attendants to chat online before meeting in person. Futhermore, it includes an interactive map that allows attendants to find others within their vicinity.
It's simple. Simply log into our online dashboard and give us some information about your event including date(s), location, and a floorplan. When it comes time for the event, simply instruct attendants to download our free app and give them an access code to login. That's it!
AirMeet will be available on April 18, 2017
Our app is available for free on all major phone platforms.
Easily meet fellow attendants around you.
AirMeet is free for conferences, conventions, and job fairs to use during our beta period.
View the profiles of fellow attendants to learn more about their skills and work.
The client app is ready on the Apple App Store and the Google Play Store.
Are you interested in using our service at your event for free during the beta? Please email us!


Manifests and Sub-Manifests
The core element of a content package is the manifest, this is the organisational level which includes metadata and all the content within a given content package. As well as the Metadata, Organizations and Resources structure which we have already come across, a manifest can also include sub-manifests - effectively whole content packages, stored within itself. Sub-manifests can contain their own metadata and will of course contain organization(s) and resources. They can also contain further sub-manifests, allowing very complex file structures to be created. We use the terms aggregation and disaggregation to cover the processes of adding and removing sub-manifests from a content package
Aggregation
Aggregation is the process of combining more than one content package manifest into a single Content Package. Right clicking on any manifest will display a content sensitive menu with Aggregate ... as the final menu item. Choosing this option will launch a dialogue box which will ask you to choose the manifest (or zipped content package) to aggregate.
There are two main ways to aggregate content: either as a sub-manifest inside a standard Content Package
or as two sub-manifests side by side within an otherwise empty Content Package.
Although both these options are equally valid it is probably better practice (if more work) to aggregate the two sub-manifests side by side. Aggregating content packages can be a very complex business and there is always a risk of files in individual sub-manifests having the same name (one overwrites the other) or non-unique identifiers (if you let Reload assign your unique identifiers it will always make sure they are unique). Ultimately however, the structure should be determined by the learning material.
Of course working with sub-manifests is more complex than working with simple content packages and many Managed Learning Environments and Repositories which are not yet fully IMS CP compliant will have problems with aggregated content. So Beware.
Disaggregation
Of course anything which has been aggregated can also be disaggregated. Right-clicking on any sub-manifest will display a content sensitive menu and the last option in the menu will be Disaggregate ... Clicking Disaggregate ... will launch a dialog box which will ask you to choose which directory to save the disaggregated content to. Once chosen, all the relevant files are copied across, including the manifest file. Within Reload, you can then Open this new Content Package as usual.


@* * Copyright 2023 HM Revenue & Customs * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. *@ @(params: Map[String, Any]) @uk.gov.hmrc.hmrcemailrenderer.templates.helpers.html.template_main(params, "You have a new message from HMRC") {
The message is about your Anti-Money Laundering Supervision (AMLS). It is only visible from inside your AMLS account.
To read your message either:
For security reasons we cannot include any links on this page.
You gave this contact email address when you signed up for Anti-Money Laundering Supervision.
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}


From investigating and analysis， I found that IF YOU DO NOTHING
STEEM POWER be increased at a rate about 0.67%
Table: Daily increase rate of STEEM POWER
Date|Rate
—-|—-
2016-08-08|(0.66%)
2016-08-07|(0.67%)
2016-08-06|(0.67%)
2016-08-05|(0.67%)
2016-08-04|(0.69%)
2016-08-03|(0.69%)
2016-08-02|(0.69%)
2016-08-01|(0.69%)
2016-07-31|(0.70%)
2016-07-30|(0.68%)
2016-07-29|(0.73%)
2016-07-28|(0.71%)
2016-07-27|(0.88%)
2016-07-26|(0.96%)
2016-07-25|(0.96%)
So, If we have 1000 STEEM POWER, and keep DO NOTHING
- 💡NO post
- 💡NO upvote
- 💡NO power up
- 💡NO Power down
- 💡NO other action which may cause STEEM POWER changed
| Day | STEEM POWER |
|---|---|
| 0 | 1000 |
| 1 | 1006.90 |
| 50 | 1410.31 |
| 100🎇 | 1988.99 |
| 150 | 2805.10 |
| 200🎇 | 3956.07 |
| 250 | 5579.31 |
| 300🎇 | 7868.58 |
| 350 | 11097.17 |
| 365 | 12302.89 |
As we can see, the STEEM POWER doubled every 100 days!!
It seemed incredible!
In the steem white paper :
STEEM is constantly increasing in supply by
100% per year
due to non-SMD incentives.
Someone who holds STEEM without converting it to SP is diluted by approximately0.19% per day
.
So Daily increase rate of STEEM POWER should be 0.19%
instead of 0.69%
.
And the STEEM POWER should doubledevery 365 days(one year)
instead of 100 days
.
So, The question is: What’s wrong?
Maybe the programmer of steem entered the wrong number?😀
This page is synchronized from the post: 🎇Wow，STEEM POWER doubled every 100 days! What’’s wrong?


Sector
Please choose a sector which best describes your work, current role or sector of interest in visiting the ODI.
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I am a graduate in BBM(MIS) from Karatina University. I have contributed in systems installations in several companies, in particular Anchor Group of Companys(Giraffe Ark Game Lodge, Anchor Flour Millers, Golden Pearl Properties and GM Kariuki Hardware). I decided to take classes in coding after being challenged by the firm that was providing and installing systems in Anchor Group(Dynasoft)
My hobbies are travelling, sports, reading and music
My skills include Customer relations, Adaptability, Time Management, and Self-motivation


Apache Drill not only helps data scientists and researchers get insights into their unstructured data, but also powers business-critical applications in many companies and enterprises around the globe. On this page, we present a few notable Drill users that run interesting use cases in production with link to resources that discuss their applications in more detail.
Please note that the list is not comprehensive, and only lists users that explicitly gave consent. If you would you like to be included on this page, please reach out by sending a direct message to @ApacheDrill on Twitter or to kunal[at]apache.org
Ericsson uses Drill to run analytics on wireless network activity on their devices and provide utilization reports to wireless network providers. Drill provides the ability to run SQL analytics on a large number of data sources at once.
At Intuit, SBSEG Data Platform team uses Apache Drill to analyze and generate reports from Kafka clickstream topics. The biggest advantage with Apache Drill is it's union type support for click stream data which is in JSON format.
Sanchez Energy uses Drill to run analytics using SQL against a rich variety of data captured from a variety of data sources - structured and semi-structured to power real time applications and decision making.
RedBus, India’s largest online bus ticketing platform uses Apache Drill's REST APIs for querying and executing ETL flows from a mix of Mongo, Kafka and S3 data stores.
Find out more!TransUnion is using Drill for their internal BI and reporting applications. They chose Drill after doing a POC with all major SQL on Hadoop engines.
At FinAnt, we use Apache Drill to do some ad-hoc queries, service data analytics.
At Institute of Operational Research & Analytics, our PhD students leverage Drill on desktops to conduct research work on large different datasets. This allows adhoc access to the data repository, while using R with Sergeant package to run analytical SQL queries.
Docube™ is a Analytics and Visualization platform that allows users to import data, create and share interactive BI visualizations. We use Drill to respond to data requirements for chart visualization by processing large Parquet dataset using SQL and custom UDFs to provide a fast user experience.


Mrs. Julia Ruth Stevens
Hey guyz, i am babe's only living sibling since we were infants.We both grew up very poor and we were always looking for food on the streets.
The great depression was when my family really struggled.
Luckily, my big bro got some great paychecks from the game itself (baseball) XD!
Waite Hoyt
I am Babe's best bud in baseball. We played together for years on the Yankees, and even a few on the Red Sox.I am famous for having the most wins in Baseball World Series record.
I also became an announcer for many teams, and I am known for my story telling when games get rained out.


My Hobbies
Cricket
Movies
Coding
Cooking
Music
My Education
Masters Degree in Computer Information Systems {Jan 2017- May 2018}
Rivier University
Masters Degree in Computer Science {Aug 2014- Dec 2015}
Rivier University


{% extends "base.html" %}
{% block title %}
User Login
{% endblock %}
{% block content %}
{% if redirect_msg %}
RoboBrothers (and RoboSisters) - we must protect this place from the Humans. Please sign in below or register to assist the RoboRevolution.
{% endif %}


Docs
Community Support
Enterprise Support
Dashboard
Deployed Bots
Open API
Open Manager
No Bots deployed yet..
Deploy Example Bot


Sprites and the use of Graphical Text/Contextual images
The contextual images
You can find what you need
Are you a Cardmember, Do More!
View and pay your cards online
Look at the Hand
This is the Sprite in its entirety


Deep-water approach at Mean Low Water. Slips available up to 100ft. Electric: 30, 50, or 100 amp single-phase service. Expanded cable TV with HBO, Encore & Showtime.
Pool, gym, and tennis courts for marina guests.
24-hour security gate and roving security at night.
Restrooms, showers, laundry and ice machine.
Phone and wireless Internet service.
Fuel delivery available.
Marina lounge with TV/Bar.
10-acre private park with BBQ and dining area.
Limousine and taxi services.
Pump out facilities and fish cleaning station.
Marine mechanics and underwater divers on call.


Sorry, this page is no longer available.
Please visit the new JetS3t Home public website, or return to the JetS3t Development homepage.


Pearson has 24 to lead Texas St. to 64-57 win over UNLV
LAS VEGAS (AP) - Nijal Pearson had 25 points to go with 10 rebounds as Texas State took control in the second half to get past UNLV 64-57 on Wednesday night.
Mason Harrell added 10 points for the Bobcats (4-2) who picked up their first road victory of the season.
The game was tied 28-28 at the break. The teams swapped the lead until Texas State’s Caleb Asberry drained a 3-pointer for a 46-44 lead with 9:23 left in the game. The Bobcats pushed it to 55-46 following a Harrell trey with 4:45 remaining. Pearson pulled up for a jumper to push the lead to 57-48 with 2:14 left. Texas State had a 9-0 run to go ahead 52-44 with 5:22 left
The Bobcats made just 22 of 53 from the floor (42 percent) but held UNLV to 17-of-49 shooting (35 percent).
Amauri Hardy led UNLV (2-4) with 18 points. Donnie Tillman added 13 points and Cheikh Mbacke Diong had eight to go with 11 rebounds.
Texas State will host Abilene Christian on Monday while UNLV will welcome SMU.
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The "struts-template" tag library contains tags that are useful in creating dynamic JSP templates for pages which share a common format. These templates are best used when it is likely that a layout shared by several pages in your application will change. The functionality provided by these tags is similar to what can be achieved using standard JSP include directive, but are dynamic rather than static.
The Template library supplies tags that are useful for creating dynamic JSP templates for pages which share a common format.
Each of the three template tags has a specific, interelated function:
The three template tags use very simple attributes :
get - Requires a single property, the name of the content to be inserted. This tag is used in the template file to indicate where in the layout to insert the content. This name matches the name property used by a put tag.
insert - Requires a single property, the name of the template. This tag is the parent to one or more put tags. The put tags indicate the content to be inserted into the template. The layout of the content is determined by get tags placed in the template.
put - Requires a name property, which should match a name used in the template file. The content property indicates the source of the content. The optional direct attribute indicates whether the content should be included or printed directly (as a literal string). The default is false, meaning content is included.
Template Tag Examples
A sample template file
<%@ taglib uri='/WEB-INF/tlds/struts-template.tld' prefix='template' %> <title><template:get name='title'/></title>

<template:get name='sidebar'/>

<template:get name='header'/>

<template:get name='content'/>

<template:get name='footer'/>

 <%
/*
"chapterTemplate.jsp" Display a "sidebar" in a column along the left side of the page.
Display a "header" over the right column.
Display the page "content" below the header.
Display a "footer" at below the content.
If we change the layout of the elements on this page, all pages
inserting this page will also change to use the new layout.
*/
%>
A sample JSP using the template
<%@ taglib uri='/WEB-INF/tlds/struts-template.tld' prefix='template' %> <template:insert template='/chapterTemplate.jsp'>
<template:put name='title' content='Templates' direct='true'/>
<template:put name='header' content='/header.html' />
<template:put name='sidebar' content='/sidebar.jsp' />
<template:put name='content' content='/introduction.html'/>
<template:put name='footer' content='/footer.html' /> </template:insert> <%
/*
"introduction.jsp" Specify template for this page (chapterTemplate.jsp).
The chapterTemplate.jsp defines the layout positions for five
elements: title, header, sidebar, content, and footer.
Specify the source file (html or jsp) for each element.
*/
%>
A sample HTML content file ("header.html") used by "introduction.jsp", and others.

A sample JSP content file ("sidebar.jsp") used by "introduction.jsp", and others.
Topics

Introduction

Using Templates

Optional Content

... and more ...

<%
/*
Specify navigational links for this application.
*/
%>
A sample HTML content file used by "introduction.jsp" only.

<link rel="stylesheet" href="css/templates.css"
charset="ISO-8859-1" type="text/css">

Introduction

Window toolkits typically provide a layout mechanism < ... />


Trolley Total
R{{total.toFixed(2)}}
Promotional Savings
-R{{pro.toFixed(2)}}
Delivery Fee
R000
Cash Off Voucher
R000
Total
R{{(total-pro).toFixed(2)}}
Note: your total is a guide price & may vary slightly upon invoicing
due to variable weight items, adding bags, and/or substitute items.
APPLY A PROMO CODE
A maximum of one free delivery voucher &
one cash off voucher may be applied
DON'T MISS OUT!
APPLY VOUCHER CODE
1
View Trolley
2Delivery details
3Order summary
4Payment
PRODUCT
DESCRIPTION
QTY
SUBSTITUTE PREFERENCE & NOTES
PRICE
0" style=" margin-left: 129px;font-size: 22px;color: red;">Your
TROLLEY is empty.Please Add Product to TROLLEY!!!
0" class="CartCheckoutActionFootComponent-CartCheckoutAction" data-index="1">


Problem solving
Getting blocked on a simple problem
Reading and understanding the question is key to problem solving. There are many instances during my learning where I have not understood the question or read it properly. A problem called 'Super FizzBuzz' had me stumped from go for a while. The first instruction was to write a method that would take an array of whole numbers. Instead of looking at the coding example properly, I assumed that the method would take a set of numbers and turn them into an array first. This introduced a level of complexity that I was not prepared for. However, the instruction was that the method would TAKE an array, not CREATE an array.
After many frustrating attempts to 'try something', I returned to the FizzBuzz (Super Edition) instructions page; I saw that the example code showed the array should be taken as the stuff that goes within the parentheses next to the function name (parameter) e.g. super_fizzbuzz([1,2,3]) not super_fizzbuzz(1,2,3). Recognising that I had read the question wrong, made me slow down and reassess my problem solving process in more depth.
Solving a problem in an elegant way
My attempts at solving Super FizzBuzz were clumsy in the beginning, but after reassessing my problem solving process and having a breather, I found some elegance in my pseudocode use. Pseudocode can be described as plain language steps of what you want your code to do. To begin with, my psuedocode was too broad, but once I reduced the problem into smaller steps, the solution became more manageable. The smaller plain language steps, made it easier to understand what I needed to research more of.
Problem solving techniques and process
- Pseudocode - plain language steps by step comments for what you want your code to do. This is an effective way to break a solution into smaller steps. I feel confident that the more practice I get using this technique, the more effective it will become. Reducing the problem into smaller chunks is also a great way to come up with solutions for problems outside of code too!
- Trying something - try something, and if it's not working, try something else. I think all these methods are a way of trying something. Coupled with another problem solving technique and a growth mindset focused on process and effort, 'trying something' is a solid technique.
- Rubber ducky method - this method involved using a rubber ducky or other inanimate object as a pretend friend to explain your problem in plain language to. I have a Vault Tec perception bobblehead as my rubber ducky when I want to channel my inner palagi man to help solve my coding problems.
- Error messages - reading error messages when things don't work is a great way to help work out where code might be going wrong. In terms of my own problem solving practice, I will need to spend more time learning what the error messages mean.
- Console logging - the console.log() statement is commonly used to debug JavaScript. Issues with this include a lack of context because often we don't even know what the problem is let alone what we should try and console.log().
- Google - searching the Internet for information to help support my learning is critical to my independent problem solving process.
- Asking coaches and peers for help - asking coaches or peers for help can illuminate a solution to a problem from a different perspective. This process also helps me feel less isolated in my work.
- Reflection - taking the time to reflect on my problem solving process has helped create some breathing space around my learning journey. The way that Foundations requires you reflect as you go also helps because reflections are threaded throughout the learning experience and not just at the end of a sprint.


[device.name]
Processing Report
Loaded On:
[loadedOn]
Device Hash (MD5):
Total Files:
[totalFiles]
Partitions fill
[spaceFilled]
% of usable space
[chart5Title]
Keyword Search Hits
[chart2Title]
Document Clusters
[chart6Title]
Graphics Clusters
[chart1Title]
Similar Devices Identified


Click the buttons to play or pause "Alexander Hamilton" by Lin Manuel Miranda.
Read about Alexander Hamilton below.


Exactly what You Need, Nothing more, Nothing less.
Responsive out of the box. The navigation automatically adapts to the amount of links you add to the main navigation.
Clean and well written code guaranteed. This code is optimized to work in all major browsers and be extremely lightweight and efficient.
Cool scrolling effect on background images throughout the page. You can add your own images to the img folder, and point to them in the


MySQL
Interfaces
MySQLConstants
Classes
AggrAsAttr1R1TMySQLClient
AggrAsAttr1R2TMySQLClient
AggrAsAttr2R1TMySQLClient
AggrAsAttr2R2TMySQLClient
Basic1R1TMySQLClient
Basic1R2TMySQLClient
Basic2R1TMySQLClient
Basic2R2TMySQLClient
Ehcache1T1RMySQLClient
Memcached1T1RMySQLClient
MVMySQLClient
MySQLCommons


Deutsch-Jozsa Algorithm
The Deutsch-Jozsa algorithm was the first to show a separation between
the quantum and classical difficulty of a problem. This algorithm
demonstrates the significance of allowing quantum amplitudes to take
both positive and negative values, as opposed to classical probabilities
that are always non-negative.
The Deutsch-Jozsa problem is defined as follows. Consider a function
\(f(x)\) that takes as input \(n\)-bit strings \(x\) and returns \(0\)
or \(1\). Suppose we are promised that \(f(x)\) is either a
constant function that takes the same value \(c\in \{0,1\}\) on
all inputs \(x\), or a balanced function that takes each value
\(0\) and \(1\) on exactly half of the inputs. The goal is to decide
whether \(f\) is constant or balanced by making as few function
evaluations as possible. Classically, it requires \(2^{n-1}+1\)
function evaluations in the worst case. Using the Deutsch-Jozsa
algorithm, the question can be answered with just one function
evaluation. In the quantum world the function \(f\) is specified by an
oracle circuit \(U_f\) (see the previous section on Grover’s
algorithm, such that \(U_f |x\rangle =(-1)^{f(x)} |x\rangle\)).
To understand how the Deutsch-Jozsa algorithm works, let us first
consider a typical interference experiment: a particle that behaves
like a wave, such as a photon, can travel from the source to an array
of detectors by following two or more paths simultaneously. The
probability of observing the particle will be concentrated at those
detectors where most of the incoming waves arrive with the same phase.
Imagine that we can set up an interference experiment as
above, with
\(2^n\) detectors and
\(2^n\) possible paths from the
source to each of the detectors. We shall label the paths and the
detectors with
\(n\)-bit strings
\(x\) and
\(y\) respectively. Suppose
further that the phase accumulated along a path
\(x\) to a detector
\(y\) equals
\(C(-1)^{f(x)+x\cdot y}\), where
\(x\cdot y=\sum_{i=1}^n x_i y_i\)
is the binary inner product and \(C\) is a normalizing coefficient.
The probability to observe the particle at a detector \(y\) can be
computed by summing up amplitudes of all paths \(x\) arriving at \(y\)
and taking the absolute value squared:
\(\mathrm{Pr}(y)=| C\sum_x (-1)^{f(x)+x\cdot y} |^2\)
Normalization condition \(\sum_y \mathrm{Pr}(y)=1\) then gives
\(C=2^{-n}\). Let us compute the probability \(\mathrm{Pr}(y=0^n)\)
of observing the particle at the detector \(y=0^n\) (all zeros
string). We have \(\mathrm{Pr}(y=0^n)=| 2^{-n}\sum_x (-1)^{f(x)}
|^2\)
If \(f(x)=c\) is a constant function, we get
\(\mathrm{Pr}(y=0^n)=|(-1)^c |^2 =1\). However, if \(f(x)\) is a
balanced function, we get \(\mathrm{Pr}(y=0^n)=0\), since all the
terms in the sum over \(x\) cancel each other.
We can therefore determine whether \(f\) is constant or balanced with
certainty by running the experiment just once.
Of course, this experiment is not practical since it would require an
impossibly large optical table! However, we can simulate this
experiment on a quantum computer with just \(n\) qubits and access to
the oracle circuit \(U_f\). Indeed, consider the following algorithm:
Step 1. Initialize \(n\) qubits in the all-zeros state
\(|0,\ldots,0\rangle\).
Step 2. Apply the Hadamard gate \(H\) to each qubit.
Step 3. Apply the oracle circuit \(U_f\).
Step 4. Repeat Step 2.
Step 5. Measure each qubit. Let \(y=(y_1,\ldots,y_n)\) be the list
of measurement outcomes.
We find that \(f\) is a constant function if \(y\) is the all-zeros
string. Why does this work? Recall that the Hadamard gate \(H\) maps
\(|0\rangle\) to the uniform superposition of \(|0\rangle\) and
\(|1\rangle\). Thus the state reached after Step 2 is \(2^{-n/2}
\sum_x |x\rangle\), where the sum runs over all \(n\)-bit strings.
The oracle circuit maps this state to \(2^{-n/2} \sum_x (-1)^{f(x)}
|x\rangle\). Finally, let us apply the layer of Hadamards at Step 4.
It maps a basis state \(|x\rangle\) to a superposition
\(2^{-n/2}\sum_y (-1)^{x\cdot y} |y\rangle\). Thus the state
reached after Step 4 is \(|\psi\rangle =\sum_y \psi(y)
|y\rangle\), where \(\psi(y)=2^{-n}\sum_x (-1)^{f(x)+x\cdot
y}\).
This is exactly what we need for the interference experiment described
above. The final measurement at Step 5 plays the role of detecting the
particle. As was shown above, the probability to measure \(y=0^n\) at
Step 5 is one if \(f\) is a constant function and zero if \(f\) is a
balanced function. Thus we have solved the Deutsch-Jozsa problem with
certainty by making just one function evaluation.
Example circuits
Suppose \(n=3\) and \(f(x)=x_0 \oplus x_1 x_2\). This function is
balanced since flipping the bit \(x_0\) flips the value of \(f(x)\)
regardless of \(x_1,x_2\). To run the Deutsch-Jozsa algorithm we
need an explicit description of the oracle circuit \(U_f\) as a
sequence of quantum gates. To this end we need a \(Z_0\) gate such
that \(Z_0|x\rangle =(-1)^{x_0} |x\rangle\) and a controlled-Z
gate \(CZ_{1,2}\) such that \(CZ_{1,2} |x\rangle =(-1)^{x_1x_2}
|x\rangle\). Using basic circuit identities (see the Basic Circuit
Identities and Larger Circuits section), one can realize the
controlled-Z gate as a CNOT sandwiched between two Hadamard gates.
Open in composer
Open in composer


@blackjok3r
both nodes gave same combinedsigs and verify gave success on both nodes, but:
spend is giving me:
{
"msg": "78175fde3928fe43f849e1f1f335b6c37532e42d583199cb96836b5305217a9a",
"combined_pk": "03d31479e789014a96ba6dd60d50210045aa8292fe693f293d44615929f04cf57a",
"combinedsig": "dd85984aff4d0cf43b5ccb17c873f217915e733d12b5fdd3c97536fd5d89235cdd25b30d0b40d5b5ef4af6f3044fefdcfc0e0132e54765b1e716a9cdccb5c7e8",
"status": "error",
"error": "musig didnt validate"
}


--- layout: post title: "Church-encoded Maybe" description: "Programming languages don't have to have a built-in notion of null values. Missing or optional values can be created from first principles. An introduction for object-oriented programmers." date: 2018-06-04 10:08 UTC tags: [Software Design] --- {% include JB/setup %}
{{ page.description }}
This article is part of a series of articles about Church encoding. In this series, you'll learn how to re-create various programming language features from first principles. In previous articles, you learned how to implement Boolean logic without Boolean primitives, as well as how to model natural numbers. Through these examples, you'll learn how to model sum types without explicit language support.
All mainstream programming languages have a built-in notion of null: a value that isn't there. There's nothing wrong with the concept; you often run into situations where you need to return a value, but in certain cases, you'll have nothing to return. Division by zero would be one example. Attempting to retrieve the first element from an empty collection would be another.
Unfortunately, for fifty years, we've been immersed in environments where null references have been the dominant way to model the absence of data. This, despite the fact that even Sir Antony Hoare, the inventor of null references, has publicly called it his billion-dollar mistake.
You can, however, model the potential absence of data in saner ways. Haskell, for example, has no built-in null support, but it does include a built-in Maybe type. In Haskell (as well as in F#, where it's called option
), Maybe
is defined as a sum type:
data Maybe a = Nothing | Just a deriving (Eq, Ord)
If you're not familiar with Haskell syntax, this is a type declaration that states that the parametrically polymorphic (AKA generic) data type Maybe
is inhabited by Just
values that contain other values, plus the constant Nothing
.
This article series, however, examines how to implement sum types with Church encoding.
Church encoding is based on the lambda calculus, which defines a universal model of computation based entirely on functions (lambda expressions) and recursion. In lambda calculus, the contract of Maybe is defined as an expression that takes two arguments. There's two fundamental 'implementations' of the contract:
nothing = λn.λj.n just = λx.λn.λj.j x
The contract is that the first function argument (n
) represents the nothing case, whereas the second argument (j
) represents the just
case.
The nothing
function is a lambda expression that takes two arguments (n
and j
), and always returns the first, left-most argument (n
).
The just
function is a lambda expression that takes three arguments (x
, n
, and j
), and always returns j x
. Recall that in the lambda calculus, everything is a function, including j
, so j x
means that the function j
is called with the argument x
.
A few paragraphs above, I wrote that the contract of maybe is modelled as an expression that takes two arguments, yet just
takes three arguments. How does that fit?
In the lambda calculus, expressions are always curried, so instead of viewing just
as a function with three arguments, you can view it as a function that takes a single element (x
) and returns a function that takes two arguments. This agrees with Haskell's Just
data constructor:
Prelude> :t Just Just :: a -> Maybe a
Haskell tells us that Just
is a function that takes an a
value (corresponding to x
in the above just
lambda expression) and returns a Maybe a
value.
Both lambda calculus and Haskell rely on currying and partial application to make the contract fit. In C#, as you've previously seen, you can instead define an interface and rely on class fields for the 'extra' function arguments. Since Church-encoded Maybe is represented by a function that takes two arguments, we'll once again define an interface with a single method that takes two arguments:
public interface IMaybe<T> { TResult Match<TResult>(TResult nothing, Func<T, TResult> just); }
In the first article, about Church-encoded Boolean values, you saw how two mutually exclusive values could be modelled as a method that takes two arguments. Boolean values are simply constants (true and false), where the next example (natural numbers) included a case where one case (successor) contained data. In that example, however, the data was statically typed as another INaturalNumber
value. In the current IMaybe<T>
example, the data contained in the just case is generic (it's of the type T
).
Notice that there's two levels of generics in play. IMaybe<T>
itself is a container of the generic type T
, whereas Match
enables you to convert the container into the rank-2 polymorphic type TResult
.
Once more, the contract of IMaybe<T>
is that the first, left-hand argument represents the nothing case, whereas the second, right-hand argument represents the just case. The nothing implementation, then, is similar to the previous ChurchTrue
and Zero
classes:
public class Nothing<T> : IMaybe<T> { public TResult Match<TResult>(TResult nothing, Func<T, TResult> just) { return nothing; } }
Again, the implementation unconditionally returns nothing
while ignoring just
. You may, though, have noticed that, as is appropriate for Maybe, Nothing<T>
has a distinct type. In other words, Nothing<string>
doesn't have the same type as Nothing<int>
. This is not only 'by design', but is a fundamental result of how we define Maybe. The code simply wouldn't compile if you tried to remove the type argument from the class. This is in contrast to C# null, which has no type.
You implement the just case like this:
public class Just<T> : IMaybe<T> { private readonly T value; public Just(T value) { this.value = value; } public TResult Match<TResult>(TResult nothing, Func<T, TResult> just) { return just(value); } }
According to the contract, Just<T>
ignores nothing
and works exclusively with the just
function argument. Notice that the value
class field is private
and not exposed as a public member. The only way you, as a caller, can potentially extract the value is by calling Match
.
Here are some examples of using the API:
> new Nothing<Guid>().Match(nothing: "empty", just: g => g.ToString()) "empty" > new Just<int>(42).Match(nothing: "empty", just: i => i.ToString()) "42" > new Just<int>(1337).Match(nothing: 0, just: i => i) 1337
Notice that the third example shows how to extract the value contained in a Nothing<int>
object without changing the output type. All you have to do is to supply a 'fall-back' value that can be used in case the value is nothing.
You can easily implement the standard Maybe predicates IsNothing
and IsJust
:
public static IChurchBoolean IsNothing<T>(this IMaybe<T> m) { return m.Match<IChurchBoolean>( nothing : new ChurchTrue(), just : _ => new ChurchFalse()); } public static IChurchBoolean IsJust<T>(this IMaybe<T> m) { return m.Match<IChurchBoolean>( nothing : new ChurchFalse(), just : _ => new ChurchTrue()); }
Here, I arbitrarily chose to implement IsJust
'from scratch', but I could also have implemented it by negating the result of calling IsNothing
. Once again, notice that the predicates are expressed in terms of Church-encoded Boolean values, instead of the built-in bool
primitives.
From Haskell (and F#) we know that Maybe is a functor. In C#, you turn a container into a functor by implementing an appropriate Select
method. You can do this with IMaybe<T>
as well:
public static IMaybe<TResult> Select<T, TResult>( this IMaybe<T> source, Func<T, TResult> selector) { return source.Match<IMaybe<TResult>>( nothing: new Nothing<TResult>(), just: x => new Just<TResult>(selector(x))); }
Notice that this method turns an IMaybe<T>
object into an IMaybe<TResult>
object, using nothing but the Match
method. This is possible because Match
has a generic return type; thus, among other types of values, you can make it return IMaybe<TResult>
.
When source
is a Nothing<T>
object, Match
returns the object in the nothing case, which here becomes a new Nothing<TResult>
object.
When source
is a Just<T>
object, Match
invokes selector
with the value contained in the just object, packages the result in a new Just<TResult>
object, and returns it.
Because the Select
method has the correct signature, you can use it with query syntax, as well as with normal method call syntax:
IMaybe<int> m = new Just<int>(42); IMaybe<string> actual = from i in m select i.ToString();
This example simply creates a just value containing the number 42
, and then maps it to a string. Another way to write the same expression would be with method call syntax:
IMaybe<int> m = new Just<int>(42); IMaybe<string> actual = m.Select(i => i.ToString());
In both cases, the result is a just case containing the string "42"
.
In this article, you saw how it's possible to define the Maybe container from first principles, using nothing but functions (and, for the C# examples, interfaces and classes in order to make the code easier to understand for object-oriented developers).
The code shown in this article is available on GitHub.
Church-encoding enables you to model sum types as functions. So far in this article series, you've seen how to model Boolean values, natural numbers, and Maybe. Common to all three examples is that the data type in question consists of two mutually exclusive cases. There's at least one more interesting variation on that pattern.
Next: Church-encoded Either.
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Best out of waste
Event Description:
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Completes the 'swap ()' function in JavaScript
swap(int a, int b) {
function swap(a, b){
def prova(a, b){
let x; x = a; a = b; b = x;
int x; x = a; a = b; b = x;
a,b = b,a
}
return a,b }
return Nan }
True
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The Gold Rush (1925)
Grade: 92
"The Gold Rush" is an outstanding silent film. It is a comedy and is unusual in that all of the gags work. The film stars Charlie Chaplin, who also produced and directed it. Whether his intentions are to make you laugh or cry, he always gives you a good reason to do so.
The film can be divided into two parts. In the first half, Chaplin's tramp character is an Alaskan prospector who has to endure a life-threatening winter storm. He is also endangered by violent criminal Black Larson, and good-hearted but very hungry Big Jim McKay.
In the film's second half, the tramp quits prospecting for life in an Alaskan village. There, he courts local beauty Georgia Hale, who is already taken by playboy Hank Curtis. The second half is slightly better than the first.
The plot is very basic, but the scenes work very well on their own. One great scene has the hungry tramp eating his boot. In another famous scene, actually a fantasy, the tramp entertains his girlfriend by pretending a pair of potatoes are his dancin' feet.
The tramp character is the most famous of silent films. But in premise it is similar to the characters portrayed by Harold Lloyd or Buster Keaton. These characters were ordinary men, always optimistic and striving for something better, no matter how bleak their situation may become.
http://members.tripod.com/~Brian_Koller/movies.html
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I am 21 years old, my birthday is November 25. I was born in argentina and have lived in Miami for about 16 years.
I love my city and enjoy photography, coding and outdoor activities and I enjoy learning about the economy, working on my economics degree, and enjoy learning about how world markets affect each other.
I have a business oriented mindset and I want to apply coding to media and create amazing projects that will allow me to show the beauty of the capacity of computers.
I am excited to see what I can do with computers going forward, and I love to learn in an engaging and fast pace way.


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