Javascript - 从字符串中删除字符 [英] Javascript - remove character from a string

问题描述

我很接近得到这个，但它只是不正确。
所有我想做的是从字符串中删除字符r。
问题是，在字符串中有多个r的实例。

示例字符串：crt / r2002_2
我想要的是：crt / 2002_2

此替换函数删除r

  mystring.replace / r / g，''）
  

产生：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，''）
  

如果我用另一个字符替换它。

解决方案

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

将替换 / r c> String.prototype.replace 。

或者，您可以使用regex href =http://stackoverflow.com/a/9933146/276250> Erik Reppen & Sagar Gala

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


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 4th character.

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

This replace function removes both "r"

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

Produces: "ct/2002_2"

I tried this function:

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

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

Any thoughts?

解决方案

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

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

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

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

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