Javascript : Making An Random Array

Possible Duplicate: Generate unique number within range (0 - X), keeping a history to prevent duplicates Writing a function that make random array,as I wrote below: RandomArray(

Solution 1:

This is one way to do it:

var RandomArray = functionRandomArray(elements) {
    var min = 0,        //minrandom number
        max = 15,       //maxrandom number
        i,              //incrementer
        arr = [];       //output
    //generate an array of length (elements) containing random number from min to maxfor (i = 0; i < elements; i += 1) {
        arr.push(Math.floor(Math.random() * (max + 1)) + min);
    }
    //return the array
    return arr;
};

​Here's a fiddle: http://jsfiddle.net/mKFk9/

Solution 2:

This might be what you need:

/**
* range Get an array of numbers within a range
* @param min {number} Lowest number in array
* @param max {number} Highest number in array
* @param rand {bool} Shuffle array
* @return {array}
*/functionrange( min, max, rand ) {
  var arr = ( newArray( ++max - min ) )
    .join('.').split('.')
    .map(function( v,i ){ return min + i })
  return rand
    ? arr.map(function( v ) { return [ Math.random(), v ] })
       .sort().map(function( v ) { return v[ 1 ] })
    : arr
}

Demo:http://jsfiddle.net/elclanrs/QBVbr/

Solution 3:

functionrandomArray(n) {

  vararray = [];
  for (i = 0; i < n; i++) {
    array[i] = i;
  }
  var newArray = [];
  for (i = 0; i < n; i++) {
    var num = Math.round(Math.random() * (n - i - 1));
    newArray[i] = array[num];
    array.splice(num, 1);
  }
  alert(newArray);
}
randomArray(100);