我如何分裂一个字符串与多个分隔符在JavaScript?
我试图拆分逗号和空格,但AFAIK JavaScript的split()函数只支持一个分隔符。
我如何分裂一个字符串与多个分隔符在JavaScript?
我试图拆分逗号和空格,但AFAIK JavaScript的split()函数只支持一个分隔符。
当前回答
在Github上查看我的简单库
如果你真的不想访问或与repo交互,下面是工作代码:
/**
*
* @param {type} input The string input to be split
* @param {type} includeTokensInOutput If true, the tokens are retained in the splitted output.
* @param {type} tokens The tokens to be employed in splitting the original string.
* @returns {Scanner}
*/
function Scanner(input, includeTokensInOutput, tokens) {
this.input = input;
this.includeTokensInOutput = includeTokensInOutput;
this.tokens = tokens;
}
Scanner.prototype.scan = function () {
var inp = this.input;
var parse = [];
this.tokens.sort(function (a, b) {
return b.length - a.length; //ASC, For Descending order use: b - a
});
for (var i = 0; i < inp.length; i++) {
for (var j = 0; j < this.tokens.length; j++) {
var token = this.tokens[j];
var len = token.length;
if (len > 0 && i + len <= inp.length) {
var portion = inp.substring(i, i + len);
if (portion === token) {
if (i !== 0) {//avoid empty spaces
parse[parse.length] = inp.substring(0, i);
}
if (this.includeTokensInOutput) {
parse[parse.length] = token;
}
inp = inp.substring(i + len);
i = -1;
break;
}
}
}
}
if (inp.length > 0) {
parse[parse.length] = inp;
}
return parse;
};
用法很简单:
var tokens = new Scanner("ABC+DE-GHIJK+LMNOP", false , new Array('+','-')).scan();
console.log(tokens);
给:
['ABC', 'DE', 'GHIJK', 'LMNOP']
如果您希望在输出中包含分隔令牌(+和-),将false设置为true,瞧!它仍然有效。
现在的用法是:
var tokens = new Scanner("ABC+DE-GHIJK+LMNOP", true , new Array('+','-')).scan();
and
console.log(tokens);
将:
['ABC', '+', 'DE', '-', 'GHIJK', '+', 'LMNOP']
享受吧!
其他回答
棘手的方法:
var s = "dasdnk asd, (naks) :d skldma";
var a = s.replace('(',' ').replace(')',' ').replace(',',' ').split(' ');
console.log(a);//["dasdnk", "asd", "naks", ":d", "skldma"]
您可以将所有想要单独或共同用作分隔符的字符合并到一个正则表达式中,并将它们传递给split函数。例如,你可以这样写:
console.log( "dasdnk asd, (naks) :d skldma".split(/[ \(,\)]+/) );
输出将是:
["dasdnk", "asd", "naks", ":d", "skldma"]
通过。com/或。net/分割URL
url.split(/\.com\/|\.net\//)
从@stephen-sweriduk解决方案开始(这对我来说更有趣!),我对它进行了轻微的修改,使其更加通用和可重用:
/**
* Adapted from: http://stackoverflow.com/questions/650022/how-do-i-split-a-string-with-multiple-separators-in-javascript
*/
var StringUtils = {
/**
* Flatten a list of strings
* http://rosettacode.org/wiki/Flatten_a_list
*/
flatten : function(arr) {
var self=this;
return arr.reduce(function(acc, val) {
return acc.concat(val.constructor === Array ? self.flatten(val) : val);
},[]);
},
/**
* Recursively Traverse a list and apply a function to each item
* @param list array
* @param expression Expression to use in func
* @param func function of (item,expression) to apply expression to item
*
*/
traverseListFunc : function(list, expression, index, func) {
var self=this;
if(list[index]) {
if((list.constructor !== String) && (list[index].constructor === String))
(list[index] != func(list[index], expression)) ? list[index] = func(list[index], expression) : null;
(list[index].constructor === Array) ? self.traverseListFunc(list[index], expression, 0, func) : null;
(list.constructor === Array) ? self.traverseListFunc(list, expression, index+1, func) : null;
}
},
/**
* Recursively map function to string
* @param string
* @param expression Expression to apply to func
* @param function of (item, expressions[i])
*/
mapFuncToString : function(string, expressions, func) {
var self=this;
var list = [string];
for(var i=0, len=expressions.length; i<len; i++) {
self.traverseListFunc(list, expressions[i], 0, func);
}
return self.flatten(list);
},
/**
* Split a string
* @param splitters Array of characters to apply the split
*/
splitString : function(string, splitters) {
return this.mapFuncToString(string, splitters, function(item, expression) {
return item.split(expression);
})
},
}
然后
var stringToSplit = "people and_other/things";
var splitList = [" ", "_", "/"];
var splittedString=StringUtils.splitString(stringToSplit, splitList);
console.log(splitList, stringToSplit, splittedString);
归还原物的:
[ ' ', '_', '/' ] 'people and_other/things' [ 'people', 'and', 'other', 'things' ]
对于那些希望在拆分函数中进行更多自定义的人,我编写了一个递归算法,它使用要拆分的字符列表拆分给定的字符串。在我看到上面的帖子之前,我写了这篇文章。我希望它能帮助一些沮丧的程序员。
splitString = function(string, splitters) {
var list = [string];
for(var i=0, len=splitters.length; i<len; i++) {
traverseList(list, splitters[i], 0);
}
return flatten(list);
}
traverseList = function(list, splitter, index) {
if(list[index]) {
if((list.constructor !== String) && (list[index].constructor === String))
(list[index] != list[index].split(splitter)) ? list[index] = list[index].split(splitter) : null;
(list[index].constructor === Array) ? traverseList(list[index], splitter, 0) : null;
(list.constructor === Array) ? traverseList(list, splitter, index+1) : null;
}
}
flatten = function(arr) {
return arr.reduce(function(acc, val) {
return acc.concat(val.constructor === Array ? flatten(val) : val);
},[]);
}
var stringToSplit = "people and_other/things";
var splitList = [" ", "_", "/"];
splitString(stringToSplit, splitList);
上面的例子返回:["people", "and", "other", "things"]
注:flatten函数取自Rosetta Code