如何解决RegEx使用RegExp.exec从字符串中提取所有匹配项
| 我正在尝试解析以下类型的字符串：[key:\"val\" key2:\"val2\"]
[description:\"aoeu\" uuid:\"123sth\"]
[deuteronomy][gatlin][~]$ node
> var re = /^\\[(?:(.+?):\"(.+?)\"\\s*)+\\]$/g
> re.exec(\'[description:\"aoeu\" uuid:\"123sth\"]\');
[ \'[description:\"aoeu\" uuid:\"123sth\"]\',\'uuid\',\'123sth\',index: 0,input: \'[description:\"aoeu\" uuid:\"123sth\"]\' ]
description:\"aoeu\"
解决方法
继续循环调用
re.exec(s)
var re = /\\s*([^[:]+):\\\"([^\"]+)\"/g;
var s = \'[description:\"aoeu\" uuid:\"123sth\"]\';
var m;
do {
m = re.exec(s);
if (m) {
console.log(m[1],m[2]);
}
} while (m);
pattern
g
const str = \'All of us except @Emran,@Raju and @Noman was there\';
console.log(
str.match(/@\\w*/g)
);
// Will log [\"@Emran\",\"@Raju\",\"@Noman\"]
replace
var re = /\\s*([^[:]+):\\\"([^\"]+)\"/g;
var s = \'[description:\"aoeu\" uuid:\"123sth\"]\';
s.replace(re,function(match,g1,g2) { console.log(g1,g2); });
var s = \'[description:\"aoeu\" uuid:\"123sth\"]\';
var re = /\\s*([^[:]+):\\\"([^\"]+)\"/g;
var m;
while (m = re.exec(s)) {
console.log(m[1],m[2]);
}
str.match(/regex/g)
function findMatches(regex,str,matches = []) {
const res = regex.exec(str)
res && matches.push(res) && findMatches(regex,matches)
return matches
}
// Usage
const matches = findMatches(/regex/g,str)
var bob = \"> bob <\";
function matchAll(str,regex) {
var res = [];
var m;
if (regex.global) {
while (m = regex.exec(str)) {
res.push(m[1]);
}
} else {
if (m = regex.exec(str)) {
res.push(m[1]);
}
}
return res;
}
var Amatch = matchAll(bob,/(&.*?;)/g);
console.log(Amatch); // yeilds: [>,<]
const matches = (text,pattern) => ({
[Symbol.iterator]: function * () {
const clone = new RegExp(pattern.source,pattern.flags);
let match = null;
do {
match = clone.exec(text);
if (match) {
yield match;
}
} while (match);
}
});
for (const match of matches(\'abcdefabcdef\',/ab/g)) {
console.log(match);
}
[ ...matches(\'abcdefabcdef\',/ab/g) ]
matchAll
matchAll
// get the letters before and after \"o\"
let matches = \"stackoverflow\".matchAll(/(\\w)o(\\w)/g);
for (match of matches) {
console.log(\"letter before:\" + match[1]);
console.log(\"letter after:\" + match[2]);
}
arrayOfAllMatches = [...matches]; // you can also turn the iterable into an array
index
input
groups
[<match>,<group1>,<group2>,...,index: <match offset>,input: <original string>,groups: <named capture groups>]
yourString.matchAll( /your-regex/ )
function findAll(regexPattern,sourceString) {
let output = []
let match
// make sure the pattern has the global flag
let regexPatternWithGlobal = RegExp(regexPattern,\"g\")
while (match = regexPatternWithGlobal.exec(sourceString)) {
// get rid of the string copy
delete match.input
// store the match data
output.push(match)
}
return output
}
console.log( findAll(/blah/g,\'blah1 blah2\') )
[ [ \'blah\',index: 0 ],[ \'blah\',index: 6 ] ]
function getAllMatches(regex,text) {
if (regex.constructor !== RegExp) {
throw new Error(\'not RegExp\');
}
var res = [];
var match = null;
if (regex.global) {
while (match = regex.exec(text)) {
res.push(match);
}
}
else {
if (match = regex.exec(text)) {
res.push(match);
}
}
return res;
}
var regex = /abc|def|ghi/g;
var res = getAllMatches(regex,\'abcdefghi\');
res.forEach(function (item) {
console.log(item[0]);
});
const string = \'Mice like to dice rice\';
const regex = /.ice/gu;
for(const match of string.matchAll(regex)) {
console.log(match);
}
var all_matches = your_string.match(re);
console.log(all_matches)
// 1) Define keywords
var keywords = [\'apple\',\'orange\',\'banana\'];
// 2) Create regex,pass \"i\" for case-insensitive and \"g\" for global search
regex = new RegExp(\"(\" + keywords.join(\'|\') + \")\",\"ig\");
=> /(apple|orange|banana)/gi
// 3) Match it against any string to get all matches
\"Test string for ORANGE\'s or apples were mentioned\".match(regex);
=> [\"ORANGE\",\"apple\"]
var re = /^(.+?):\"(.+)\"$/
var regExResult = re.exec(\'description:\"aoeu\"\');
var purifiedResult = purify_regex(regExResult);
// We only want the group matches in the array
function purify_regex(reResult){
// Removes the Regex specific values and clones the array to prevent mutation
let purifiedArray = [...reResult];
// Removes the full match value at position 0
purifiedArray.shift();
// Returns a pure array without mutating the original regex result
return purifiedArray;
}
// purifiedResult= [\"description\",\"aoeu\"]
var re = /^(.+?):\"(.+)\"$/
var regExResult = re.exec(\'description:\"aoeu\"\');
var purifiedResult = purify_regex(regExResult);
function purify_regex(reResult){
let purifiedArray = [...reResult];
purifiedArray.shift();
return purifiedArray;
}
let re = /\\s*([^[:]+):\\\"([^\"]+)\"/g
let str = \'[description:\"aoeu\" uuid:\"123sth\"]\'
(str.match(re) || []).map(e => RegExp(re.source,re.flags).exec(e))
[ [ \'description:\"aoeu\"\',\'description\',\'aoeu\',index: 0,input: \'description:\"aoeu\"\',groups: undefined ],[ \' uuid:\"123sth\"\',\'uuid\',\'123sth\',input: \' uuid:\"123sth\"\',groups: undefined ] ]
^\\s*\\[\\s*([^\\s\\r\\n:]+)\\s*:\\s*\"([^\"]*)\"\\s*([^\\s\\r\\n:]+)\\s*:\\s*\"([^\"]*)\"\\s*\\]\\s*$
const regex = /^\\s*\\[\\s*([^\\s\\r\\n:]+)\\s*:\\s*\"([^\"]*)\"\\s*([^\\s\\r\\n:]+)\\s*:\\s*\"([^\"]*)\"\\s*\\]\\s*$/gm;
const str = `[description:\"aoeu\" uuid:\"123sth\"]
[description : \"aoeu\" uuid: \"123sth\"]
[ description : \"aoeu\" uuid: \"123sth\" ]
[ description : \"aoeu\" uuid : \"123sth\" ]
[ description : \"aoeu\"uuid : \"123sth\" ] `;
let m;
while ((m = regex.exec(str)) !== null) {
// This is necessary to avoid infinite loops with zero-width matches
if (m.index === regex.lastIndex) {
regex.lastIndex++;
}
// The result can be accessed through the `m`-variable.
m.forEach((match,groupIndex) => {
console.log(`Found match,group ${groupIndex}: ${match}`);
});
}null
// The MatchAll Function
function matchAll (regexp,input,matches = []) {
const regex = regexp.exec(input)
if (regex === null) return matches
// Filter out any undefined results
const matched = regex.filter(i => i)
// Destruct some common used values
const { index } = regex
const [ full,g2,g3] = matched
// Slice the input string to last match
const string = input.slice(index + full.length)
// Do something with the captured groups
// Push this into an array
matches.push({
prop: \'H\' + g1 + g3 + g3 + \'ary \' + g2
})
// Return
return matchAll(regexp,string)
}
// Record of matches
const matches = []
// The RegExp,we are looking for some random letters / words in string
const regExp = new RegExp(/(i{1}).*(did).*(l{1})/)
// An example string to parse
const testString = `Jeffrey Epstein didn\'t kill himself!`
// Run
matchAll(regExp,testString,matches)
// Returned Result
console.log(matches)var str = \'[me nombre es] : My name is. [Yo puedo] is the right word\';
var reg = /\\[(.*?)\\]/g;
var a = str.match(reg);
a = a.toString().replace(/[\\[\\]]/g,\"\").split(\',\'));
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