正则表达式匹配两个相似的词

Question

I run into a problem where the regular expression won't match two similar words:

Example:

bitcoin and bitcoin atm

Regular Expression:

new RegExp("(?:^|\\b)(bitcoin|bitcoin atm|test bitcoin)(?!\\w)");

Here's a demo :

 (function myFunction() { var str = "bitcoin and bitcoin atm and test and test a and new test"; var patt = new RegExp("(?:^|\\\\b)(bitcoin|bitcoin atm|test|test a|new test)(?!\\\\w)", "g"); var res = str.match(patt); document.getElementById("demo").innerHTML = res; })() 

 p{ font-size: 30px; } 

 <p id="demo"></p> 

Answer 1

Move more specific matches to be higher priority in your matching pattern.

 (function myFunction() { var str = "bitcoin and bitcoin atm and test and test a and new test"; var patterns = ['bitcoin', 'bitcoin atm','test', 'test a', 'new text']; patterns.sort(function(a,b){return b.length - a.length}) var patt = new RegExp("(?:^|\\\\b)(" + patterns.join('|') + ")(?!\\\\w)", "g"); var res = str.match(patt); document.getElementById("demo").innerHTML = res; })() 

 p{ font-size: 30px; } 

 <p id="demo"></p>