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• Dynamic Dispatch
• Dynamic Method
• Ghost Methods
• Dynamic Proxies
• Blank Slate
• Kernel Method
• Flattening the Scope (aka Nested Lexical Scopes)
• Context Probe
• Class Eval (not really a 'spell' more just a demonstration of its usage)
• Class Macros

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Destructuring(or pattern matching) is a way used to extract data from a data structure(tuple, list, record) that mirros the construction. Compare to other languages, Elm support much less destructuring but let's see what it got !

Tuple

myTuple = ("A", "B", "C")
myNestedTuple = ("A", "B", "C", ("X", "Y", "Z"))

let
  (a,b,c) = myTuple

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$.ajaxSetup({
    beforeSend: function(xhr, settings) {
        if (settings.type == 'POST' || settings.type == 'PUT' || settings.type == 'DELETE') {
            function getCookie(name) {
                var cookieValue = null;
                if (document.cookie && document.cookie != '') {
                    var cookies = document.cookie.split(';');
                    for (var i = 0; i < cookies.length; i++) {
                        var cookie = jQuery.trim(cookies[i]);
                        // Does this cookie string begin with the name we want?

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What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Element

Box metrics

• elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent
• elem.clientLeft, elem.clientTop, elem.clientWidth, elem.clientHeight
• elem.getClientRects(), elem.getBoundingClientRect()

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body {
  font-size: 5vw;
}
@media (max-width: 700px) {
  body {
    font-size: 35px;
  }
}
@media (min-width: 3000px) {
  body {

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The introduction to Reactive Programming you've been missing

(by @andrestaltz)

So you're curious in learning this new thing called Reactive Programming, particularly its variant comprising of Rx, Bacon.js, RAC, and others.

Learning it is hard, even harder by the lack of good material. When I started, I tried looking for tutorials. I found only a handful of practical guides, but they just scratched the surface and never tackled the challenge of building the whole architecture around it. Library documentations often don't help when you're trying to understand some function. I mean, honestly, look at this:

Rx.Observable.prototype.flatMapLatest(selector, [thisArg])

Projects each element of an observable sequence into a new sequence of observable sequences by incorporating the element's index and then transforms an observable sequence of observable sequences into an observable sequence producing values only from the most recent observable sequence.

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// Use Gists to store code you would like to remember later on
console.log(window); // log the "window" object to the console

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=Navigating=
    visit('/projects')
    visit(post_comments_path(post))

=Clicking links and buttons=
    click_link('id-of-link')
    click_link('Link Text')
    click_button('Save')
    click('Link Text') # Click either a link or a button
    click('Button Value')

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<?php
$modx = new modX();

$modx->setLogTarget(XPDO_CLI_MODE ? 'ECHO' : 'HTML');
$modx->initialize('mgr');
$modx->setLogLevel(modX::LOG_LEVEL_INFO);
$modx->exec("UPDATE {$modx->getTableName('modResource')} SET uri = '' WHERE uri_override = 0");

//$modx->call('modResource', 'refreshURIs', array(&$modx));
foreach ($modx->getIterator('modResource', $criteria) as $resource) {

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<?php  die('This file is not really here!');

/**
 * ------------- DO NOT UPLOAD THIS FILE TO LIVE SERVER ---------------------
 *
 * Implements code completion for CodeIgniter in phpStorm
 * phpStorm indexes all class constructs, so if this file is in the project it will be loaded.
 * -------------------------------------------------------------------
 * Drop the following file into a CI project in phpStorm
 * You can put it in the project root and phpStorm will load it.