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Re: collection enumeration: msg#00210

lang.smalltalk.squeak.beginners

Subject: Re: collection enumeration



Am 23.08.2006 um 21:15 schrieb cdrick:

Hi all -

not an important question here, more a discussion. I was wondering
which method is the more appropriate (nice and/or efficient) to
enumerate all the elements of a collection and the index of each
elements...


(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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