關於陣列的小結
阿新 • • 發佈:2018-11-02
如何實現陣列的隨機排序?
方法一:
var arr = [1,2,3,4,5,6,7,8,9,10]; function randSort1(arr){ for(var i = 0,len = arr.length;i < len; i++ ){ var rand = parseInt(Math.random()*len); var temp = arr[rand]; arr[rand] = arr[i]; arr[i] = temp; }return arr; } console.log(randSort1(arr));
方法二:
var arr = [1,2,3,4,5,6,7,8,9,10]; function randSort2(arr){ var mixedArray = []; while(arr.length > 0){ var randomIndex = parseInt(Math.random()*arr.length); mixedArray.push(arr[randomIndex]); arr.splice(randomIndex,1); } return mixedArray; } console.log(randSort2(arr));
方法三:
var arr = [1,2,3,4,5,6,7,8,9,10]; arr.sort(function(){ return Math.random() - 0.5; }) console.log(arr);