如何通过重复相同的单词创建与另一个匹配的字符串？ [英] How do I create a string matching another by repeating the same word?

问题描述

我正在尝试寻找一个重复相同单词的函数，直到它与输入消息的长度相匹配。



示例：输入是我喜欢旅游并获得纪念品。

输出将是bananapiecreambananapiecreambananap

所以我的密钥的每个字符都会匹配输入消息中的字符，包括空格和标点符号。



我尝试过： < br $>

I am trying to look for a function that would repeat the same word until it matches the length of the input message.

Example: input is "I love to travel and get souvenirs."
output would be "bananapiecreambananapiecreambananap"
so each character of my key would match a character from the input message including spaces and punctuation.

What I have tried:

var str = "bananapie";
var endingW = "cream";
var codeKey = str.concat(endingW);
var input = prompt("input message to transform");

我从这里迷失了。

I am pretty lost from here.

推荐答案

尝试

try

var input = "Hello World!";
var key = "foo42";
var output = "";
var keylen = key.length;
for (var i = 0, len = input.length; i < len; i++) {
  output += key[ i % keylen];
}
alert(output);

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