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Parameters AttributeRequiredTypeDefaultDescriptionindextruestringVariable name for the loop's index. Defaults to the variables scope.fromtruenumericStarting value for the index.totruenumericEnding value for the index.stepfalsenumeric1Value by which to increase or decrease the index per iteration.Ba...

The XMPP network can be thought of as a bidirected graph with servers (S) operating in a mesh, clients (C) clustered about their local server, and streams represented by extraverted edges: When a client wants to send data (eg. a message or presence information) across the network to another clien...

The CSS multi-column layout makes it easy to create multiple columns of text. Code <div id="multi-columns">Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation...

@input is useful to bind data between components First, import it in your component import { Input } from '@angular/core'; Then, add the input as a property of your component class @Input() car: any; Let's say that the selector of your component is 'car-component', when you call the compone...

A custom control does not have to limit itself to trivial things like primitives; it can edit more interesting things. Here we present two types of custom controls, one for editing persons and one for editing addresses. The address control is used to edit the person's address. An example of usage wo...

Passing a context with a timeout (or with a cancel function) to a long running function can be used to cancel that functions work: ctx, _ := context.WithTimeout(context.Background(), 200*time.Millisecond) for { select { case <-ctx.Done(): return ctx.Err() default: ...

This code writes the string to a file. It is important to close the writer, so this is done in a finally block. public void writeLineToFile(String str) throws IOException { File file = new File("file.txt"); BufferedWriter bw = null; try { bw = new BufferedWriter(ne...

And, of course, you can mix these approaches, and use both packages and imports along side your application specific code. A mix-mode structure is most common in three situations: a franken-app, which is just sort of pulling a bit from here-and-there without any overall strategy; an app that's bei...

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While if performs an action only when its condition evaluate to true, if / else allows you to specify the different actions when the condition true and when the condition is false. Example: if (a > 1) puts("a is larger than 1"); else puts("a is not larger than 1"...

You will often find yourself with a collection of data where you are only interested in parts of the data. In the example below we got a list of participants at an event and we want to provide a the tour guide with a simple list of names. // First we collect the participants $participants = colle...

Collections also provide you with an easy way to do simple statistical calculations. $books = [ ['title' => 'The Pragmatic Programmer', 'price' => 20], ['title' => 'Continuous Delivery', 'price' => 30], ['title' => 'The Clean Coder', 'price' => 10], ] $min = col...

use-fixtures allows to wrap each deftest in namespace with code that runs before and after test. It can be used for fixtures or stubbing. Fixtures are just functions that take test function and run it with other necessary steps (before/after, wrap). (ns myapp.test (require [clojure.test :refer ...

The text-transform property allows you to change the capitalization of text. Valid values are: uppercase, capitalize, lowercase, initial, inherit, and none CSS: .example1 { text-transform: uppercase; } .example2 { text-transform: capitalize; } .example3 { text-transform: lowerc...

C++11 It's possible to write a generic function (for example min) which accepts various numerical types and arbitrary argument count by template meta-programming. This function declares a min for two arguments and recursively for more. template <typename T1, typename T2> auto min(const T1 &...

module SomeMixin def foo puts "foo!" end end class Bar include SomeMixin def baz puts "baz!" end end b = Bar.new b.baz # => "baz!" b.foo # => "foo!" # works thanks to the mixin Now Bar is a mix of it...

This code compiles: Integer arg = null; int x = arg; But it will crash at runtime with a java.lang.NullPointerException on the second line. The problem is that a primitive int cannot have a null value. This is a minimalistic example, but in practice it often manifests in more sophisticated f...

Conditional contexts in Lua (if, elseif, while, until) do not require a boolean. Like many languages, any Lua value can appear in a condition. The rules for evaluation are simple: false and nil count as false. Everything else counts as true. if 1 then print("Numbers work.") ...

Conditional expressions can be done with ~[ and ~]. The clauses of the expression are separated using ~;. By default, ~[ takes an integer from the argument list, and picks the corresponding clause. The clauses start at zero. (format t "~@{~[First clause~;Second clause~;Third clause~;Fourth cl...

+ dictionaryWithCapacity: Creates and returns a mutable dictionary, initially giving it enough allocated memory to hold a given number of entries. NSMutableDictionary *dict = [NSMutableDictionary dictionaryWithCapacity:1]; NSLog(@"%@",dict); - init Initializes a newly allocated mut...