control structures (was "Re: Sins")

[Aahz Maruch]

In article <38774EBA.40716D1E at maxtal.com.au>,
skaller  <skaller at maxtal.com.au> wrote:
>
>	Current looping constructions are so bad,
>that the simplest of uses cannot be expressed
>using them : searching a list for an element
>cannot be written correctly:
>
>	for i in X: 
>		if X[i]=e: goto Found
>	print "Not Found"
>	goto next
>	Found: ...
>	next
>
>YUKKKKKK!!! There is no natural way to do this.
>We fall through the loop on failure, instead
>of success. (using a flag, or testing anything
>afterwards, is not acceptable as a solution).

Why is using a flag or testing afterwards not acceptable?
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