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Re: collection enumeration: msg#00213

lang.smalltalk.squeak.beginners

Subject: Re: collection enumeration

but is a not the fastest one?
because you nearly only call primitives?

I did not check.
Cedric did you benchmark a and c.
even if large dictionaries degenerate in Squeak.

(a) ---- à la C

(1 to: collection size) do: [:index |
html render: 'Victime ', index
printString.
html render:
collection at: index]

(b) --- indexOf

collection do: [:victim |
html render: 'Victime ', (collection indexOf: victim) printString.
html render: victim]

(c) ---- keysAndValuesDo:

collection keysAndValuesDo: [:index :victim |
html render: index printString.
html render: member]

(d) ---- using a local var

| index |
index := 0.
collection do: [:victim | index := index + 1.
html render: 'Victime ', index
printString.
html render: victim]

What solution would you suggest ?
I think we forget (a) and (d)
I like (c) but maybe (b) is more readable ?

Maybe there is another way ?

(c), though I like #withIndexDo: better since it mimics the #with:do: pattern.

- Bert -

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