Get a random item from a JavaScript array

Question

var items   Array 523  3452  334  31       5346    How do I get random item from items

User · Answer

var items   Array 523 3452 334 31    5346    function rand min  max      var offset   min    var range    max - min    1     var randomNumber   Math floor  Math random     range    offset    return randomNumber      randomNumber   rand 0  items length - 1    randomItem   items randomNumber     credit   Javascript Function  Random Number Generator

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An alternate way would be to add a method to the Array prototype    Array prototype random   function  length           return this Math floor  Math random   length          var teams     patriots    colts    jets    texans    ravens    broncos    var chosen team   teams random teams length   alert chosen team

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1  solution  define Array prototype  Array prototype random   function        return this Math floor  Math random   this length         that will work on inline arrays   2 3 5  random     and of course predefined arrays  list    2 3 5  list random     2  solution  define custom function that accepts list and returns element  get random   function  list      return list Math floor  Math random   list length         get random  2 3 5

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const ArrayRandomModule          get random item from array   random  function  array        return array Math random     array length   0               mutate   extract from given array a random item   pick  function  array  i        return array splice i  gt   0   i   Math random     array length   0  1  0               mutate   shuffle the given array   shuffle  function  array        for  var i   array length  i  gt  0  --i        array push array splice Math random     i   0  1  0        return array

User · Answer

jQuery is JavaScript  It s just a JavaScript framework  So to find a random item  just use plain old JavaScript  for example   var randomItem   items Math floor Math random   items length

User · Answer

1  Random shuffle items items sort function    return 0 5 - Math random         2  Get first item var item   items 0    Shorter   var item   items sort function    return 0 5 - Math random     0

User · Answer

If you really must use jQuery to solve this problem  NB  you shouldn t     function            rand   function arg            if    isArray arg                 return arg   rand arg length              else if  typeof arg      number                 return Math floor Math random     arg             else               return 4      chosen by fair dice roll                     jQuery    var items    523  3452  334  31       5346   var item   jQuery rand items     This plugin will return a random element if given an array  or a value from  0    n  given a number  or given anything else  a guaranteed random value   For extra fun  the array return is generated by calling the function recursively based on the array s length     Working demo at http   jsfiddle net 2eyQX

User · Answer

var rndval items Math floor Math random   items length

User · Answer

var item   items Math floor Math random     items length

User · Answer

If you are using node js  you can use unique-random-array  It simply picks something random from an array

User · Answer

Here s yet another way  function rand items            quot    quot  for a closest  quot int quot      return items    items length   Math random         Or as recommended below by  1248177  function rand items            quot   quot  for a kinda  quot int div quot      return items items length   Math random     0

User · Answer

var random   items Math floor Math random   items length

User · Answer

Use underscore  or loDash       var randomArray          cc0000    00cc00     0000cc         use   sample var randomElement     sample randomArray       manually use   random var randomElement   randomArray   random randomArray length-1      Or to shuffle an entire array      use underscore s shuffle function var firstRandomElement     shuffle randomArray  0

[javascript] Get a random item from a JavaScript array

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