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But a redo (just like next and last is just a glorified goto.

I consider this statement blatently false and missleading.

  • goto FOO causes is designed to cause execution to jump to the lable FOO anywhere in your script (provided no initialization would be neccessary to get there)
  • redo FOO will only work if the is designed to cause execution to jump to label FOO if it exists at some surrounding loop block. (allthough it will work w/warning if the label applies to some dynamicly surrounding loop)

This typo generates an error...

perl -le 'BAR: print 1; BAZ: for (2..3) {print; redo BAR; }'

This typo causes an infinite loop...

perl -le 'BAR: print 1; BAZ: for (2..3) {print; goto BAR; }'

(Updated to be less pedantic... the point is, goto is for arbitrary jumping, redo is for controlled jumping to the begining of a loop. Could you live w/o redo if you had goto? yes. Does that mean you should just use goto and not bother with redo? no.)


In reply to Re: Re: GOTO considered (a necessary) evil? by hossman
in thread GOTO considered (a necessary) evil? by gav^

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