根據一條線:
s = "Test abc test test abc test test test abc test test abc";
这似乎只是在上面的行中删除ABC的第一次出现:
s = s.replace('abc', '');
如何替代所有事件?
当前回答
我只是想分享我的解决方案,基于JavaScript最新版本的一些功能功能:
var str = "Test abc test test abc test test test abc test test abc";
var result = str.split(' ').reduce((a, b) => {
return b == 'abc' ? a : a + ' ' + b; })
console.warn(result)
其他回答
这个解决方案结合了一些以前的答案,并更好地符合建议的2020年8月标准解决方案,这个解决方案在2020年9月对我来说仍然可行,因为String.replaceAll不在我使用的Node.js二进制中。
RegExp.escape 是一个单独的问题处理,但它在这里很重要,因为官方提出的解决方案将自动逃脱基于链条的查找输入。
如果你需要准确的标准符合,对于一个应用程序,它是严格依赖于标准实施,那么我建议使用Babel或其他工具,你得到“正确的答案”每次而不是Stack Overflow。
代码:
if (!Object.prototype.hasOwnProperty.call(RegExp, 'escape')) {
RegExp.escape = function(string) {
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions#Escaping
// https://github.com/benjamingr/RegExp.escape/issues/37
return string.replace(/[.*+\-?^${}()|[\]\\]/g, '\\$&'); // $& means the whole matched string
};
}
if (!Object.prototype.hasOwnProperty.call(String, 'replaceAll')) {
String.prototype.replaceAll = function(find, replace) {
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/replaceAll
// If you pass a RegExp to 'find', you _MUST_ include 'g' as a flag.
// TypeError: "replaceAll must be called with a global RegExp" not included, will silently cause significant errors. _MUST_ include 'g' as a flag for RegExp.
// String parameters to 'find' do not require special handling.
// Does not conform to "special replacement patterns" when "Specifying a string as a parameter" for replace
// Does not conform to "Specifying a function as a parameter" for replace
return this.replace(
Object.prototype.toString.call(find) == '[object RegExp]' ?
find :
new RegExp(RegExp.escape(find), 'g'),
replace
);
}
}
编码,小型:
Object.prototype.hasOwnProperty.call(RegExp,"escape")||(RegExp.escape=function(e){return e.replace(/[.*+\-?^${}()|[\]\\]/g,"\\$&")}),Object.prototype.hasOwnProperty.call(String,"replaceAll")||(String.prototype.replaceAll=function(e,t){return this.replace("[object RegExp]"==Object.prototype.toString.call(e)?e:new RegExp(RegExp.escape(e),"g"),t)});
例子:
console.log(
't*.STVAL'
.replaceAll(
new RegExp(RegExp.escape('T*.ST'), 'ig'),
'TEST'
)
);
console.log(
't*.STVAL'
.replaceAll(
't*.ST',
'TEST'
);
);
没有 RegExp.Escape 的代码:
if (!Object.prototype.hasOwnProperty.call(String, 'replaceAll')) {
String.prototype.replaceAll = function(find, replace) {
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/replaceAll
// If you pass a RegExp to 'find', you _MUST_ include 'g' as a flag.
// TypeError: "replaceAll must be called with a global RegExp" not included, will silently cause significant errors. _MUST_ include 'g' as a flag for RegExp.
// String parameters to 'find' do not require special handling.
// Does not conform to "special replacement patterns" when "Specifying a string as a parameter" for replace
// Does not conform to "Specifying a function as a parameter" for replace
return this.replace(
Object.prototype.toString.call(find) == '[object RegExp]' ?
find :
new RegExp(find.replace(/[.*+\-?^${}()|[\]\\]/g, '\\$&'), 'g'),
replace
);
}
}
代码没有 RegExp.Escape,小型:
Object.prototype.hasOwnProperty.call(String,"replaceAll")||(String.prototype.replaceAll=function(e,t){return this.replace("[object RegExp]"==Object.prototype.toString.call(e)?e:new RegExp(e.replace(/[.*+\-?^${}()|[\]\\]/g,"\\$&"),"g"),t)});
虽然人们已经提到使用regex,如果你想取代文本的情况下,有一个更好的方法。
// Consider the below example
originalString.replace(/stringToBeReplaced/gi, '');
// The output will be all the occurrences removed irrespective of casing.
你可以在这里提到详细的例子。
点击此处,我肯定会帮助你:
<!DOCTYPE html>
<html>
<body>
<p>Click the button to do a global search and replace for "is" in a string.</p>
<button onclick="myFunction()">Try it</button>
<p id="demo"></p>
<script>
function myFunction() {
var str = 'Is this "3" dris "3"?';
var allvar= '"3"';
var patt1 = new RegExp( allvar, 'g' );
document.getElementById("demo").innerHTML = str.replace(patt1,'"5"');
}
</script>
</body>
</html>
这里是JSFiddle的链接。
您可以在没有Regex的情况下做到这一点,但如果替代文本包含搜索文本,则要小心。
吉。
replaceAll("nihIaohi", "hI", "hIcIaO", true)
因此,这里是一个合适的替代All 选项,包括字符串的原型:
function replaceAll(str, find, newToken, ignoreCase)
{
let i = -1;
if (!str)
{
// Instead of throwing, act as COALESCE if find == null/empty and str == null
if ((str == null) && (find == null))
return newToken;
return str;
}
if (!find) // sanity check
return str;
ignoreCase = ignoreCase || false;
find = ignoreCase ? find.toLowerCase() : find;
while ((
i = (ignoreCase ? str.toLowerCase() : str).indexOf(
find, i >= 0 ? i + newToken.length : 0
)) !== -1
)
{
str = str.substring(0, i) +
newToken +
str.substring(i + find.length);
} // Whend
return str;
}
或者,如果你想有一个字符串原型功能:
String.prototype.replaceAll = function (find, replace) {
let str = this;
let i = -1;
if (!str)
{
// Instead of throwing, act as COALESCE if find == null/empty and str == null
if ((str == null) && (find == null))
return newToken;
return str;
}
if (!find) // sanity check
return str;
ignoreCase = ignoreCase || false;
find = ignoreCase ? find.toLowerCase() : find;
while ((
i = (ignoreCase ? str.toLowerCase() : str).indexOf(
find, i >= 0 ? i + newToken.length : 0
)) !== -1
)
{
str = str.substring(0, i) +
newToken +
str.substring(i + find.length);
} // Whend
return str;
};
var str = "ff ff f f a de def";
str = str.replace(/f/g,'');
alert(str);
HTTP://jsfiddle.net/ANHR9/
