Re^4: Detecting if a scalar has a number or string

Note that looks_like_number() tells you exactly the same thing, just without all of the overhead. (:

Comment on Re^4: Detecting if a scalar has a number or string

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Re^5: Detecting if a scalar has a number or string by davido (Cardinal) on Dec 15, 2004 at 23:24 UTC
For the record, you're absolutely right. Scalar::Util's `looks_like_number()` is 655% faster than my eval trap fatal warning approach. But for some reason I do get a sort of a kick out of the idea of letting `perl` (the interpreter) tell me if a scalar is a number, rather than Perl (the script). Consider my solution purely an academic enveavor, and use the module for production code. The benchmark script: Read more... (939 Bytes) The results: `Rate Seems Looks Seems 38.8/s -- -87% Looks 297/s 665% --` [download] Dave	[reply] [d/l] [select]

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Re^5: Detecting if a scalar has a number or string
by davido (Cardinal) on Dec 15, 2004 at 23:24 UTC

For the record, you're absolutely right. Scalar::Util's looks_like_number() is 655% faster than my eval trap fatal warning approach. But for some reason I do get a sort of a kick out of the idea of letting perl (the interpreter) tell me if a scalar is a number, rather than Perl (the script). Consider my solution purely an academic enveavor, and use the module for production code.

The benchmark script: