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Due to auto unboxing, one can use a Boolean in an if statement: Boolean a = Boolean.TRUE; if (a) { // a gets converted to boolean System.out.println("It works!"); } That works for while, do while and the condition in the for statements as well. Note that, if the Boolean is null...

Syntax for accessing rows and columns: [, [[, and $ This topic covers the most common syntax to access specific rows and columns of a data frame. These are Like a matrix with single brackets data[rows, columns] Using row and column numbers Using column (and row) names Like a list: Wi...

To use an accordion, one must have headers and content inside the headers in their HTML. Then one must instantiate the accordion() method of jQuery UI. <script> $(function() { $( "#accordion" ).accordion(); }); </script> In the HTML: <div id="accordion&quot...

$( "#accordion" ).accordion( "destroy" ); This will remove the accordion functionality completely and show default HTML removing all the jQuery-UI elements. This method does not take any arguments.

$( "#accordion" ).accordion( "disable" ); This method will disable the accordion, i.e. the headers are not selectable making the content read only and static. This method does not take any arguments.

$( "#accordion" ).accordion( "enable" ); This method will enable an accordion. This will enable a disabled accordion or simply do nothing on an already enabled accordion. This method does not take any arguments.

var options = $( "#accordion" ).accordion( "option" ); This will return a PlainObject giving all the options representing the selected accordion. This will contain all the values of the keys that are explained in the Parameters section. This method takes parameters which are ...

$( "#accordion" ).accordion( "refresh" ); This method recomputes the height of the accordion panels if headers or content was added or removed in the DOM.

var widget = $( "#accordion" ).accordion( "widget" ); This method returns a jQuery object containing the accordion.

var array = [3, 2, 1] Creating a new sorted array As Array conforms to SequenceType, we can generate a new array of the sorted elements using a built in sort method. 2.12.2 In Swift 2, this is done with the sort() method. let sorted = array.sort() // [1, 2, 3] 3.0 As of Swift 3, it has...

A failing test will provide helpful output as to what went wrong: # projectroot/tests/test_code.py from module import code def test_add__failing(): assert code.add(10, 11) == 33 Results: $ py.test ================================================== test session starts ===============...

A typical email has three main components: A recipient (represented as an email address) A subject A message body Sending mail in PHP can be as simple as calling the built-in function mail(). mail() takes up to five parameters but the first three are all that is required to send an email (al...

Annotation types are defined with @interface. Parameters are defined similar to methods of a regular interface. @interface MyAnnotation { String param1(); boolean param2(); int[] param3(); // array parameter } Default values @interface MyAnnotation { String param1() defau...

Switch statements compare the value of an expression against 1 or more values and executes different sections of code based on that comparison. var value = 1; switch (value) { case 1: console.log('I will always run'); break; case 2: console.log('I will never run'); break;...

fetch('/example.json', { headers: new Headers({ 'Accept': 'text/plain', 'X-Your-Custom-Header': 'example value' }) });

Posting form data fetch(`/example/submit`, { method: 'POST', body: new FormData(document.getElementById('example-form')) }); Posting JSON data fetch(`/example/submit.json`, { method: 'POST', body: JSON.stringify({ email: document.getElementById('example-email').val...

The first argument of re.match() is the regular expression, the second is the string to match: import re pattern = r"123" string = "123zzb" re.match(pattern, string) # Out: <_sre.SRE_Match object; span=(0, 3), match='123'> match = re.match(pattern, string) ma...

pattern = r"(your base)" sentence = "All your base are belong to us." match = re.search(pattern, sentence) match.group(1) # Out: 'your base' match = re.search(r"(belong.*)", sentence) match.group(1) # Out: 'belong to us.' Searching is done anywhere in the ...

Special characters (like the character class brackets [ and ] below) are not matched literally: match = re.search(r'[b]', 'a[b]c') match.group() # Out: 'b' By escaping the special characters, they can be matched literally: match = re.search(r'\[b\]', 'a[b]c') match.group() # Out: '[b]' T...

Replacements can be made on strings using re.sub. Replacing strings re.sub(r"t[0-9][0-9]", "foo", "my name t13 is t44 what t99 ever t44") # Out: 'my name foo is foo what foo ever foo' Using group references Replacements with a small number of groups can be made a...