Re^2: Search and replace

Hi Hippo ,

I want to change the string to output when the string clk matches not the input to output

Can you provide me good tutorial for reg expression ?

Comment on Re^2: Search and replace

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Re^3: Search and replace by hippo (Archbishop) on May 23, 2021 at 16:10 UTC
You could try Regular Expressions Tutorial, the Basics (for BEGINNERS) which is listed on our Tutorials page under the Pattern Matching, Regular Expressions, and Parsing section. There's also the official tutorial at perlretut. Enjoy. 🦛	[reply]
Re^3: Search and replace by tybalt89 (Monsignor) on May 23, 2021 at 16:09 UTC
`$line =~ s/input(?= .*clk)/output/g;` [download] Untested since no test cases were provided.	[reply] [d/l]