如何使用Javascript从字符串中删除字符？ [英] How can I remove a character from a string using Javascript?

问题描述

我非常接近这一点，但这是不对的。
我想做的就是从字符串中删除字符r。
问题是，字符串中有多个r实例。
但是，它始终是索引4处的字符（所以第5个字符）。

I am so close to getting this, but it just isn't right. All I would like to do is remove the character "r" from a string. The problem is, there is more than one instance of "r" in the string. However, it is always the character at index 4 (so the 5th character).

示例字符串：crt / r2002_2
我是什么想要：crt / 2002_2

example string: "crt/r2002_2" What I want: "crt/2002_2"

此替换功能同时删除r

mystring.replace(/r/g, '')

产生：ct / 2002_2

Produces: "ct/2002_2"

我试过这个函数：

String.prototype.replaceAt = function (index, char) {
return this.substr(0, index) + char + this.substr(index + char.length);
}
mystring.replaceAt(4, '')

它只能起作用如果我用另一个角色替换它。它不会简单地删除它。

It only works if I replace it with another character. It will not simply remove it.

有什么想法吗？

推荐答案

var mystring = "crt/r2002_2";
mystring = mystring.replace('/r','/');

将用<$ c替换 / r $ c> / 使用 String.prototype.replace 。

will replace /r with / using String.prototype.replace.

或者你可以使用带有全局标志的正则表达式（如建议由 Erik Reppen & 下面的Sagar Gala 用

Alternatively you could use regex with a global flag (as suggested by Erik Reppen & Sagar Gala, below) to replace all occurrences with

mystring = mystring.replace(/\/r/g, '/');

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