如何替换两个索引之间的子字符串 [英] How to replace a substring between two indices

问题描述

我想在Javascript中的两个索引之间替换文本，例如：

I want to replace text between two indices in Javascript, something like:

str = "The Hello World Code!";
str.replaceBetween(4,9,"Hi");
// outputs "The Hi World Code"

索引和字符串都是动态的。

The indices and the string are both dynamic.

我怎么能这样做？

推荐答案

那里在JavaScript中没有这样的方法。但你可以随时创建自己的：

There is no such method in JavaScript. But you can always create your own:

String.prototype.replaceBetween = function(start, end, what) {
    return this.substring(0, start) + what + this.substring(end);
};

"The Hello World Code!".replaceBetween(4, 9, "Hi");
// >> "The Hi World Code!"

这篇关于如何替换两个索引之间的子字符串的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！