[英]javascript random item in array?
所以我有一个strings: ["a", "b", "c", "d"]
数组strings: ["a", "b", "c", "d"]
,但是我希望array[4]
每次使用时都是一个随机字符串,所以:
array[0] returns "a",
array[1] returns "b",
array[4] returns something random, like "x",
array[4] returns something random the second time as well, like "y",
有一个函数random(),但是如果我将array[4]
设置为random(),它将保持该随机值不变,但是每次调用它都需要保持随机性。
var a = ["a", "b", "c", "d"];
Object.defineProperty(a, 4, { get: Math.random });
console.log(a[4]); // some random number
console.log(a[4]); // another random number
var array = { get 4() {return getRandomInt(1,10);} }
alert(array[4]);
alert(array[4]);
alert(array[4]);
function getRandomInt(min, max) {
return Math.floor(Math.random() * (max - min)) + min;
}
function random() {
character = String.fromCharCode(Math.floor( Math.random() * 26) + "a".charCodeAt(0));
return character;
}
这是完成相似功能的方法
arrayManager = {
array: ["a", "b", "c", "d"]
set: function(i, v) {
this.array[i] = v;
}
get: function(i) {
if (i == 4) return random();
else return this.array[i];
}
};
var random = arrayManager.get(4);
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