javascript - 重复字符串 - Javascript

Question

这个问题在这里已经有了答案:

Repeat a string in JavaScript a number of times (25 个回答)

关闭 10 个月前。

返回重复任意次数的字符串的最佳或最简洁的方法是什么？

以下是我迄今为止最好的镜头:

function repeat(s, n){
    var a = [];
    while(a.length < n){
        a.push(s);
    }
    return a.join('');
}

Answer 1

Note to new readers: This answer is old and and not terribly practical - it's just "clever" because it uses Array stuff to get String things done. When I wrote "less process" I definitely meant "less code" because, as others have noted in subsequent answers, it performs like a pig. So don't use it if speed matters to you.

我会直接把这个函数放到 String 对象上。与其创建一个数组，填充它，然后用一个空字符连接它，只需创建一个适当长度的数组，然后用你想要的字符串连接它。相同的结果，更少的过程!

String.prototype.repeat = function( num )
{
    return new Array( num + 1 ).join( this );
}

alert( "string to repeat\n".repeat( 4 ) );