Tutorial by Examples: u

Add typings to your package.json { ... "typings": "path/file.d.ts" ... } Now when ever that library is imported typescript will load the typings file

Because a clack request is represented as a plist, we can use pattern matching as the entry point to the clack app as a way to route request to their appropriate controllers (defvar *app* (lambda (env) (match env ((plist :request-method :get :request-uri uri) (...

Using pattern matching one can intertwine function definition and pattern matching, similar to SML. (trivia:defun-match fib (index) "Return the corresponding term for INDEX." (0 1) (1 1) (index (+ (fib (1- index)) (fib (- index 2))))) (fib 5) ;; => 8

bc is an arbitrary precision calculator language. It could be used interactively or be executed from command line. For example, it can print out the result of an expression: echo '2 + 3' | bc 5 echo '12 / 5' | bc 2 For floating-post arithmetic, you can import standard library bc -l: echo ...

This example is a basic setup for unittesting the StringBuilder.toString() using junit. import static org.junit.Assert.assertEquals; import org.junit.Test; public class StringBuilderTest { @Test public void stringBuilderAppendShouldConcatinate() { StringBuilder stringBui...

Fish shell is friendlier yet you might face trouble while using with virtualenv or virtualenvwrapper. Alternatively virtualfish exists for the rescue. Just follow the below sequence to start using Fish shell with virtualenv. Install virtualfish to the global space sudo pip install virtualfish...

To add a method to a button, first create an action method: Objective-C -(void) someButtonAction{ NSLog(@"Button is tapped"); } Swift func someButtonAction() { print("Button is tapped") } Now to add this action method to your button, you have to wri...

from scipy.sparse import csr_matrix A = csr_matrix([[1,0,2],[0,3,0]]) >>>A <2x3 sparse matrix of type '<type 'numpy.int64'>' with 3 stored elements in Compressed Sparse Row format> >>> A.todense() matrix([[1, 0, 2], [0, 3, 0]]) >>&g...

Sometimes it is necessary or desirable to place the legend outside the plot. The following code shows how to do it. import matplotlib.pylab as plt fig, ax = plt.subplots(1, 1, figsize=(10,6)) # make the figure with the size 10 x 6 inches fig.suptitle('Example of a Legend Being Placed Outside of...

An Explain infront of a select query shows you how the query will be executed. This way you to see if the query uses an index or if you could optimize your query by adding an index. Example query: explain select * from user join data on user.test = data.fk_user; Example result: id select_type...

The type alias keyword combination gives a new name for a type, but the type keyword in isolation declares a new type. Let's examine one of the most fundamental of these types: Maybe type Maybe a = Just a | Nothing The first thing to note is that the Maybe type is declared with a type ...

CREATE TRIGGER BooksDeleteTrigger ON MyBooksDB.Books AFTER DELETE AS INSERT INTO BooksRecycleBin SELECT * FROM deleted; GO

You can start some slow process in parallel and then collect the results when they are done: Public Sub Main() Dim results = Task.WhenAll(SlowCalculation, AnotherSlowCalculation).Result For Each result In results Console.WriteLine(result) Next End Sub Async Functio...

You can create an IEnumerable of Task by passing AddressOf AsyncMethod to the LINQ Select method and then start and wait all the results with Task.WhenAll If your method has parameters matching the previous LINQ chain call, they will be automatically mapped. Public Sub Main() Dim tasks = Enum...

Check the app's authorization status with: //Swift let status: CLAuthorizationStatus = CLLocationManager.authorizationStatus() //Objective-C CLAuthorizationStatus status = [CLLocationManager authorizationStatus]; Test the status against the follow constants: //Swift switch status { case ...

ASDF provides the package ASDF-USER for developers to define their packages in.

Notepad++ can be installed: From the installer downloaded from the project's web site From Ninite, which would download and automatically install the latest version available: https://ninite.com/notepadplusplus/ Built from sources who are available in the GitHub Repo of this project.

Background ============ WebStorm is lightweight yet powerful Integrated Development Environment (IDE) perfectly equipped for complex client-side development and server-side development, it is cross-platform and works on Windows, Mac OS X, and Linux. WebStorm features advanced support for JavaScri...

Example: <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title></title> </head> <body> <textarea id="content"></textarea> <input type="button" id="copy...

The blockquote element can be used for a (block-level) quote: <blockquote> <p>The answer is 42.</p> </blockquote> Source URL (cite attribute) The cite attribute can be used to reference the URL of the quoted source: <blockquote cite="http://example.com/blog/...