Javascript 如何删除javascript字符串中索引之间的字符
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/5217557/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
how can i remove chars between indexes in a javascript string
提问by scatman
i have the following:
我有以下几点：
var S="hi how are you";
var bindex = 2;
var eindex = 6;
how can i remove all the chars from S that reside between bindex and eindex?
therefore S will be "hi are you"
如何从 S 中删除位于 bindex 和 eindex 之间的所有字符？
因此 S 将是“你好”
采纳答案by Anurag
First find the substring of the string to replace, then replace the first occurrence of that string with the empty string.
首先找到要替换的字符串的子字符串，然后用空字符串替换该字符串的第一次出现。
S = S.replace(S.substring(bindex, eindex), "");
Another way is to convert the string to an array, spliceout the unwanted part and convert to string again.
另一种方法是将字符串转换为数组，splice去掉不需要的部分并再次转换为字符串。
var result = S.split('');
result.splice(bindex, eindex - bindex);
S = result.join('');
回答by Rasmus Striib
Take the text before bindex and concatenate with text after eindex, like:
取 bindex 之前的文本并与 eindex 之后的文本连接，例如：
var S="hi how are you";
var bindex = 2; var eindex = 6;
S = S.substr(0, bindex) + S.substr(eindex);
S is now "hi are you"
S 现在是“你好”
回答by Alex Pacurar
try
尝试
S = S.substring(0, bindex)+S.substring(eindex);
回答by lonesomeday
回答by CertainPerformance
A solution that doesn't require creating any intermediate arrays or strings is to use .replaceto capturethe first characters in a group, match the characters you want to remove, and replace with the first captured group:
不需要创建任何中间数组或字符串一种解决方法是使用.replace来获取一组中的第一个字符，匹配您要删除的角色，并与第一捕获组取代：
// keep first 3 characters, remove next 4 characters
const s = "hi how are you";
console.log(
s.replace(/(.{3}).{4}/, '')
);回答by CloudyMarble
S.split(S.substring(bindex, eindex)).join(" ");
S.split(S.substring(bindex, eindex)).join(" ");
回答by Don
You can:
你可以：
- get the substring from bindex and eindex
- remove spaces from that string
rebuild the string
var new_s = S.slice(1, bindex) + S.slice(bindex, eindex).replace(/\s/g, '') + S.slice(eindex)
- 从 bindex 和 eindex 获取子字符串
- 从该字符串中删除空格
重建字符串
var new_s = S.slice(1, bindex) + S.slice(bindex, eindex).replace(/\s/g, '') + S.slice(eindex)
回答by ChrisBrownie55
DON'T USE SLICE; TRY SPLICE
不要使用切片；尝试拼接
While sliceis good and all, it was designed like substring, it was designed to get stuff, not remove stuff.
虽然slice很好，但它的设计就像substring，它旨在获取东西，而不是删除东西。
Caveat: splice was written for Arrays.
警告：拼接是为数组编写的。
Good news: strings are easily turned into Arrays.
好消息：字符串很容易变成数组。
String.prototype.splice = function(start, deleteCount) {
const newStringArray = this.split('')
newStringArray.splice(start, deleteCount)
return newStringArray.join('')
}
'Hello World'.splice(2, 5)
// Output -> "Heorld"
回答by Gyumeijie
The following function returns the complementary result of slice function:
以下函数返回切片函数的互补结果：
String.prototype.remainderOfSlice = function(begin, end) {
begin = begin || 0
end = (end === undefined) ? this.length : end
if (this.slice(begin, end) === '') return this + ''
return this.slice(0, begin) + this.slice(end)
}
examples:
例子：
"hi how are you".slice(2, 6) // " how"
"hi how are you".remainderOfSlice(2, 6) // "hi are you"
"hi how are you".slice(-2, 6) // ""
"hi how are you".remainderOfSlice(-2, 6) // "hi how are you"
