Grab strings before and after inner string in regex Javascript

Question

I have a string like this:

20 EQUALS 'Value goes here'

I want to split it up into 3 separate strings:

conditionField = 20 conditionOperation = 'EQUALS' conditionValue = 'Value goes here'

I tried this to get the Condition Field:

var conditionField = condition.replace(/(.*)(.*EQUALS)/, '$1');

But it get's the beginning and the end.

I'm having trouble splitting it up and dealing with the white space and spaces in the value.

What are all possible inputs? Twenty LESS THAN '21' is this valid input? — Tushar
– Tushar, Commented Aug 21, 2017 at 5:07
@Tushar No, the conditionField will always be a number, the operation will never have a space — Jordash
– Jordash, Commented Aug 21, 2017 at 5:08
This should work then /^(\d+)\s+([a-z]+)\s+(.*)$/i. Use $1, $2 and $3 to get respective values. — Tushar
– Tushar, Commented Aug 21, 2017 at 5:10

Tim Biegeleisen · Accepted Answer · 2017-08-21 05:22:17Z

1

Your question would actually be a bit of challenge if you wanted to arbitrarily extract quoted terms along with individual words. But since you appear to have a rather fixed structure, starting with a single number, then a single word command, followed by a third term, we can use the following regex pattern here:

([^\\s]*)\\s+([^\\s]*)\\s+(.*)

Each term in parentheses above will be made available as a capture group after the match has been run. In this case, I just blanket everything after the first two terms together.

var string = "20 EQUALS 'Value goes here'";

var re = new RegExp("([^\\s]*)\\s+([^\\s]*)\\s+(.*)");
match = re.exec(string);
if (match != null) {
    console.log(match[1])
    console.log(match[2])
    console.log(match[3])
}

edited Aug 21, 2017 at 5:22

answered Aug 21, 2017 at 5:14

Tim Biegeleisen

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3 Comments

Tushar Over a year ago

I'll recommend using Regex Literal syntax. That way, you don't have to escape those backslashes.

Tim Biegeleisen Over a year ago

@Tushar I'd be happy to edit if I even knew what that was :-) ... 100K doesn't mean I know everything.

Tushar Over a year ago

Here's trick: Execute new RegExp("([^\\s]*)\\s+([^\\s]*)\\s+(.*)") in browser console and you'll get it. :)

binariedMe · Accepted Answer · 2017-08-21 05:17:07Z

0

Try this :

var data = '20 EQUALS 30'; var a = data.split(/(\d*) ([a-zA-Z]*) (\d*)/g); conditionField = a[1]; conditionOperation = a[2]; conditionValue = a[3];

answered Aug 21, 2017 at 5:17

binariedMe

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1 Comment

georg Over a year ago

Sorry, but "Try this :" + a chunk of code isn't terribly helpful to anyone.

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