Javascript : Get word after specific word?

How to get a word after specific word?

For example: I have string like this :

string = "Price:$20 is very cheap" 

I want get result: $20

How can I do that with Javascript?

0

7 Answers

You can use regex:

var matches = /Price:(.*?) /g.exec("Price:$20 is very cheap");
if(matches.length > 1) { var price = matches[1];
}
else { // Not found
}

Note this will match any sequence of characters after the word Price:. If there is whitespace after the word price, it will break. If there is no space after $20, it will break. You need to make the rules more complex depending on your input source.

3

Split the string by : and then with space.

string.split(":")[1].split(" ")[0]

Various solutions without regular expressions :

var s = 'Price:$20 is very cheap';
var s1 = s.slice(6, s.indexOf(' '));
var s2 = s.slice(s.indexOf(':') + 1, s.indexOf(' '));
var s3 = s.slice(s.indexOf('$'), s.indexOf(' '));
// s1 === s2 === s3 === "$20"

var str = 'Price:$20 is very cheap';
var price = str.split(' ')[0].split(':')[1]; // $20

var matches = /Price:(\$\d+)/.exec(string)
matches[1];//"$20"

You can use string.split(":")[1].split(" ")[0]

or else you can use combination of str.substring(); & str.indexOf();.Fiddle example:

Using Regular Expression is a better way, as string methods cannot return correct answers on all cases.

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