用逗号分隔的字符串的此正则表达式有什么问题？

Question

I'm trying to convert a comma or semicolon separated string into an array, but handling before conversion several omission from users (double commas, space after comma or semicolon). In the example:

myStr = "item1, item2,,, this is item3; item4 , "

I want to get:

myArray = ["item1", "item2", "this is item3", "item4"]

My actual regex is:

myArray = myStr.split(/[(,\s);,]+/);

But, although I'm adding parenthesis to the combination comma-space (,\\s) the regex are catching the spaces inside the third item. Any advice what could be wrong with regex?

Answer 1

Try this (edited) :

 var myStr = "item1, item2,,, this is item3; item4 , "; var myArray = myStr.split(/\\s*[,;]+\\s*/).filter(Boolean); alert(myArray); 

Answer 2

[] only contains single characters or character classes and only matches one character at a time. Therefore, [(,\\s);,] really means any of these characters are matched: (),; or whitespace.

There are easier approaches than regex. Try this:

myArray = myStr
  .split(/[;,]/)                 
  .map(function (str) { 
    return str.replace(/(^\s+)|(\s+$)/g, ''); // Trim whitespace
  }) 
  .filter(Boolean);              // Filter away the empty strings

Answer 3

I think you need to ensure you always match at least one non-white-space character. Try this:

myArray = myStr.split(/[\s]*[,;][,;\s]*/);

Answer 4

var myArray = myStr.split(/(?: , | ; | ,| ;|, |; |;|,)+/);  

 Then do a quick trim() and verify if the item has content other than whitespace

Would effectively split a string using , or ; as the separator

 var myStr = "item1, item2,,, this is item3; item4 , "; var myArray = myStr.split(/(?: , | ; | ,| ;|, |; |;|,)+/); var newArray = []; for (var i=0; i<myArray.length; i++) { var checkArray = myArray[i].trim(); if (checkArray.length > 0) { newArray.push(myArray[i]); } } myArray = newArray; console.log(myArray); 

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ANSWER 2

The best answer I could come up with was one I made by combining @Jacob's answer and my answer above.

This will effectively Accomplish the job in the fastest way possible

 var myStr = "item1, item2,,, this is item3; item4 , "; var myArray = myStr.split(/(?:,|;)+/).map(function (str) { return str.replace(/(^\\s+)|(\\s+$)/g, ''); }).filter(Boolean); console.log(myArray);