Just so that you are not confused later, the <EXPR> operator is documented in perlop. It can be a shorthand for either glob (reading filenames from a directory) or readline (reading lines from a file/IO handle), and these functions are documented in perlfunc.

Also, the defined function is there because, if there were a file named "0" (zero) returned from glob(), then the while loop would end otherwise since "0" is false (but defined).

In reply to Re: When is defined true? by runrig
in thread When is defined true? by LazrD

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