INTERVIEW QUESTIONS PROGRAMMING LANGUAGES PERL DETAILS

Question: How do you match one letter in the current locale?

Answer: /[^W_d]/
We don't have full POSIX regexps, so you can't get at the isalpha() <ctype.h> macro save indirectly. You ask for one byte which is neither a non-alphanumunder, nor an under, nor a numeric. That leaves just the alphas, which is what you want.

/[^W_d]/
We don't have full POSIX regexps, so you can't get at the isalpha() <ctype.h> macro save indirectly. You ask for one byte which is neither a non-alphanumunder, nor an under, nor a numeric. That leaves just the alphas, which is what you want. Source: CoolInterview.com

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