Re^2: How to trim a line from leading and trailing blanks without using regex or non-standard modules

So if you want the exact same semantic, it'll become far more complicated than this regex.

I agree. That's a good point. Thank you !

In other words it is not easy to design a good trim function without regex, but it is possible to design one that used regex, but treating the single quoted string as a special case

For example

trim(' ',$line)

trim(/\s/.$line)

BTW this is impossible in Python which implements regex via library, unless you add a new lexical type to the Language (regex string instead of raw string that is used).

Comment on Re^2: How to trim a line from leading and trailing blanks without using regex or non-standard modules

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Re^3: How to trim a line from leading and trailing blanks without using regex or non-standard modules by LanX (Saint) on Aug 15, 2020 at 01:04 UTC
> `trim(/\s/.$line)` I doubt this is valid syntax. you probably mean `trim( qr/\s/, $line)` see Re^3: How to trim a line from leading and trailing blanks without using regex or non-standard modules for a slightly better implementation > this is impossible in Python passing regex inside a string is fine in Perl, why not in Python? Cheers Rolf _{(addicted to the Perl Programming Language :) Wikisyntax for the Monastery}	[reply] [d/l] [select]

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Re^3: How to trim a line from leading and trailing blanks without using regex or non-standard modules
by LanX (Saint) on Aug 15, 2020 at 01:04 UTC

> trim(/\s/.$line)

I doubt this is valid syntax.

you probably mean

trim( qr/\s/, $line)

see Re^3: How to trim a line from leading and trailing blanks without using regex or non-standard modules for a slightly better implementation

> this is impossible in Python

passing regex inside a string is fine in Perl, why not in Python?

Cheers Rolf
_{(addicted to the Perl Programming Language :)

Wikisyntax for the Monastery}

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