Javascript Split Space Delimited String And Trim Extra Commas And Spaces

I need to split a keyword string and turn it into a comma delimited string. However, I need to get rid of extra spaces and any commas that the user has already input. var keywordS

Solution 1:

You will need a regular expression in both cases. You could split and join the string:

str = str.split(/[\s,]+/).join();

This splits on and consumes any consecutive white spaces and commas. Similarly, you could just match and replace these characters:

str = str.replace(/[\s,]+/g, ',');

For the trailing comma, just append one

str = .... + ',';

If you have preceding and trailing white spaces, you should remove those first.

Reference:.split, .replace, Regular Expressions

Solution 2:

In ES6:

var temp = str.split(",").map((item)=>item.trim());

Solution 3:

In addition to Felix Kling's answer

If you have preceding and trailing white spaces, you should remove those first.

It's possible to add an "extension method" to a JavaScript String by hooking into it's prototype. I've been using the following to trim preceding and trailing white-spaces, and thus far it's worked a treat:

// trims the leading and proceeding white-spaceString.prototype.trim = function()
{
    returnthis.replace(/^\s\s*/, '').replace(/\s\s*$/, '');
};

Solution 4:

I would keep it simple, and just match anything not allowed instead to join on:

str.split(/[^a-zA-Z-]+/g).filter(v=>v);

This matches all the gaps, no matter what non-allowed characters are in between. To get rid of the empty entry at the beginning and end, a simple filter for non-null values will do. See detailed explanation on regex101.

var str = ", ,, ford,    tempo, with,,, sunroof,, ,";

var result = str.split(/[^a-zA-Z-]+/g).filter(v=>v).join(',');

console.info(result);

Solution 5:

let query = "split me by space and remove trailing spaces and store in an array  ";
let words = query.trim().split(" ");
console.log(words)

Output : [ 'split', 'me', 'by', 'space','and','remove', 'trailing', 'spaces', 'and', 'store', 'in', 'an', 'array' ]