You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
59 lines
1.5 KiB
Plaintext
59 lines
1.5 KiB
Plaintext
// Generate a random string
|
|
Math.random().toString(36).substr(2);
|
|
|
|
// Clone an array
|
|
var newA = myArray.slice(0);
|
|
|
|
// Remove HTML tags
|
|
'<b>A</b>'.replace(/<[^>]+>/gi, '');
|
|
|
|
// Reverse a string
|
|
var str = "abc def ghi.";
|
|
str.split('').reverse().join(''); // '.ihg fed cba'
|
|
|
|
// Reverse order of words in a string
|
|
str.split(' ').reverse().join(' '); // 'ghi. def abc'
|
|
|
|
// Pad Zeros
|
|
// pad(2) => 02
|
|
// pad(10) => 10
|
|
function pad(v){return ('0'+v).substr(-2);}
|
|
|
|
// Shuffle array
|
|
function shuffle(ar) { return ar.slice().sort(function() { return Math.random() > 0.5 ? 1 : -1 }) }
|
|
|
|
// Check if object is empty
|
|
// is_empty([]) => true
|
|
// is_empty({}) => true
|
|
// is_empty([1]) => false
|
|
function is_empty(obj){if(obj instanceof Array){return obj.length===0;}else if(obj instanceof Object){for(var i in obj)return false;return true;}else return !obj;}
|
|
|
|
// Check is it's a scalar object
|
|
// is_scalar(1) => true
|
|
// is_scalar({}) => false
|
|
function is_scalar(obj){return (/string|number|boolean/).test(typeof obj);}
|
|
|
|
// Sign of a number
|
|
Math.prototype.sign = function(num){ return (num>0) - (num<0);}
|
|
|
|
// Min of an array
|
|
Array.prototype.min = function() { return Math.min.apply(Math, this); };
|
|
|
|
//Max of an array
|
|
Array.prototype.max = function() { return Math.max.apply(Math, this); };
|
|
|
|
// Shorter if
|
|
// if( variable==1 || variable==2 || variable==3 || variable==15 ) alert('found')
|
|
if ([1,2,3,15].indexOf(variable)!=-1) alert('found')
|
|
|
|
// Convert value to boolean
|
|
!!value;
|
|
|
|
// Bitwise tricks:
|
|
// Math.floor(4.9); is
|
|
4.9 | 0;
|
|
|
|
// Bitwise tricks:
|
|
// Toggle between two values
|
|
x = a ^ b ^ x;
|