Re: Perl credited with changing the rules

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Re^2: Perl credited with changing the rules by etcshadow (Priest) on Oct 20, 2004 at 01:38 UTC
Absolutely. Perl is, in some ways, a big monstrous tool (it is, after all, a complete language). However, perl is also (and frequently) just a material from which many tools are built. `perl -lne '$x+=$_; END{print $x}'`, for example, is a simple tool (you might even alias it to "sum"), much like sort or grep. Heck, if you're on a system without sort or grep, maybe you create an alias for `perl -lne 'push@x,$_; END{print sort @x}'` (yeah, i know it doesn't support all the options that typical GNU sort would... but if you know perl, you can do that easily), or for: `perl -ne 'BEGIN{$pattern=shift@ARGV} print if /$pattern/'` (same arguments, and many more, etc). Anyway, the point is that perl isn't just a universal tool. It can also be a set of many simple tools. For the record, no, I never make aliases for stuff like this, I just do 'em on the fly... for example, who needs a -n option to a sort alias, if, rather, you just add {$a <=> $b} in the sort? `------------ :Wq Not an editor command: Wq` [download]	[reply] [d/l] [select]
Re^3: Perl credited with changing the rules by Anonymous Monk on Oct 21, 2004 at 16:11 UTC
The advantage of having a `-n` option to sort meant that sort users had an optimized numerical sort from the start. It took Perl more than ten years to optimize the common `{$a <=> $b}` such that one doesn't need to enter/leave a scope for each comparison. Oh, and `-n` types a lot faster than `{$a <=> $b}`.	[reply] [d/l] [select]