CODEWITHSUNDEEP
javascriptregex
Reza
Reza

Reputation: 19933

Extract text between last slash and last dot using regex

I have string like this in javascript

at LoggerService.log (/Users/apps/api/webpack:/pcs-goc-api/pcs-libs/logger/src/logger.service.ts:107:29)

I want to extract logger.service from it. the formula is between last / to last .

I can extract from last / using /([^\/]+$)/g but don't know how to limit the finding to last .

Note: these are other examples:

at LoggerService.log (/Users/apps/api/webpack:/pcs-goc-api/pcs-libs/logger/src/logger.ts:107:29) expected: logger

at LoggerService.log (/Users/apps/api/webpack:/pcs-goc-api/pcs-libs/logger/src/logger.js:107:29) expected: logger

at LoggerService.log (/Users/apps/api/webpack:/pcs-goc-api/pcs-libs/logger/src/api.logger.service.ts:107:29) expected: api.logger.service

Upvotes: 3

Views: 388

Answers (3)

Tim Biegeleisen
Tim Biegeleisen

Reputation: 522817

We can try using a regex replacement approach here:

var log = "at LoggerService.log (/Users/apps/api/webpack:/pcs-goc-api/pcs-libs/logger/src/api.logger.service.ts:107:29)";
var output = log.replace(/^.*\/|\.[^.]*$/g, "");
console.log(output);

The regex pattern here says to match:

  • ^.*\/ all content from the start up to and including the LAST /
  • | OR
  • \.[^.]*$ all content from the LAST dot until the end

Then, we replace with empty string, leaving behind the string we want.

Upvotes: 2

Wiktor Stribiżew
Wiktor Stribiżew

Reputation: 627607

You can use

/.*\/(.*)\./

Details:

  • .* - any zero or more chars other than line break chars as many as possible
  • \/ - a / char
  • (.*) - Group 1: any zero or more chars other than line break chars as many as possible
  • \. - a . char.

See the JavaScript demo:

const text = "at LoggerService.log (/Users/apps/api/webpack:/pcs-goc-api/pcs-libs/logger/src/api.logger.service.ts:107:29)";
const match = text.match(/.*\/(.*)\./)
if (match) {
    console.log(match[1]);
}

Upvotes: 2

Onur Uslu
Onur Uslu

Reputation: 1149

([^\/]+)[.][^:]+:\d+:\d+

Demo: https://regex101.com/r/FeLRmi/1

  • [.] => "." character
  • [^:] => Any character except ":"
  • [^:]+ => One or more [^:]
  • :\d+ => One or more digits after ":"

All the other regex statements are your own.

Upvotes: 1

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