# array shuffle

shuffle for associative arrays, preserves key=>value pairs. (based on (vladimir kornea of typetango)'s function) <?php function shuffle_assoc(&\$array) { \$keys = array_keys(\$array); shuffle(\$keys); foreach(\$keys as \$key) { \$new[\$key] = \$array[\$key]; } \$array = \$new; return true; } ?> note: as of php .., array_rand's

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fisheryates shuffle algorithm works in o(n) time complexity. the assumption here is, we are given a function rand() that generates random number in o() time. the idea is to start from the last element, swap it with a randomly selected element from the whole array (including last). now consider the array from to n (size  definition and usage. the shuffle() function randomizes the order of the elements in the array. this function assigns new keys for the elements in the array. existing keys will be removed (see example below).

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here is a javascript implementation of the durstenfeld shuffle, a computeroptimized version of fisheryates: randomize array element order inplace. using durstenfeld shuffle algorithm. function shufflearray(array) { for (var i = array.length ; i > ; i) { var j = math.floor(math.random() (i )); var temp = array[i];  shuffle a set of numbers without duplicates. example: init an array with set , , and . int[] nums = {,,}; solution solution = new solution(nums); shuffle the array [,,] and return its result. any permutation of [,,] must equally likely to be returned. solution.shuffle(); resets the array back to its original configuration

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randomize the order of the elements in a given array. randomize the order of items in an array. uses the fisheryates algorithm. install. \$ npm install save arrayshuffle. usage. const shuffled = arrayshuffle([, , , , , ]);. => [, , , , , ]. license. mit sindre sorhus. keywords. array · arr · list · shuffle · sort · random · rand · fisher · yates. install.