How to be more restrictive on a split?

Question

I want to be more restrictive with my split by only take the string that is given. I mean it should replace only the string that is given, not the one with _dyna.

I don't know how to convert my split to resolve that.

My wish is respect caps and only if the string is the same as the given one

I think it's only possible to respect caps but maybe someone here know how to do all I want to do

var base = "depends_on: - tomato-app - guacamole_dyna - GUACAMOLE - guacamole - guAcamole"

var newStr = base.split("guacamole").join("newstring");

console.log(newStr)

`base.split(/\bguacamole\b/).join("newstring")`? - `\b` matches word boundaries. Alternatively you could match whitespace. — le_m, May 30 '17 at 10:50
Related: https://stackoverflow.com/questions/12465610/how-do-i-spilt-a-string-in-javascript-by-using-a-word-as-a-delimiter/12465717 — le_m, May 30 '17 at 10:54
@NinaScholz because I founded https://stackoverflow.com/questions/1144783/how-to-replace-all-occurrences-of-a-string-in-javascript but if you have a better solution I'd love to use it — Jerome, May 30 '17 at 10:57

Nina Scholz · Accepted Answer · 2017-05-30T11:16:53.173

1

You could use a regular expression which uses whitespace or stast or end of the string. Then replace only the second match.

var base = "depends_on: - tomato-app - guacamole_dyna - GUACAMOLE - guacamole - guAcamole",
    search = 'guacamole',
    replace = 'newstring',
    regex = new RegExp('(^|\\s)' + search + '(?=\\s|$)', 'g'),
    newStr = base.replace(regex, '$1' + replace);
    
console.log(newStr);

edited May 30 '17 at 11:16

answered May 30 '17 at 11:07

Nina Scholz

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can I put a variable instead of typing `guacamole` ? Because I tried like this : `replace('/(^|\s)' + myVar + '(?=\s|$)/g', "$1newstring");` but it doesn't work – Jerome May 30 '17 at 11:11
1

@Jerome, yes, you can build a new regular expression out of a string with the constructor of `RegExp`. – Nina Scholz May 30 '17 at 11:17
1

It works like a charm ! Thank you so much for the nice input (and it's not the first time that you help me with a great input) – Jerome May 30 '17 at 11:31

How to be more restrictive on a split?

1 Answers1