Extract text between last slash and last dot using regex-CodePudding

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

CodePudding user response：

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]);
}

CodePudding user response：

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.

CodePudding user response：

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