Perl: just "^" a word match: $ lines only matches the beginning of each line = ~ s / ^ / file_4_ex_ch7.txt: / gm;

 

 

Perl: just "^" a word match: $ lines only matches the beginning of each line = ~ s / ^ / file_4_ex_ch7.txt: / gm;

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Origin www.cnblogs.com/books2read/p/11125307.html