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csauls
Joined: 27 Mar 2004
Posts: 278
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 Posted: Thu May 25, 2006 1:47 am Post subject: mango.utils.Array? |
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As just came up on the NG, basic common array functions are a must, so maybe Mango could have a mango.utils.Array module, analogous to mango.utils.Text and that in Cashew:
http://www.codemeu.com:81/~pontiff/projects/cashew/docs/ArrayUtils.html
Just some essentials for when you do a lot of array handling, but don't need the elaboration of mango.containers. 
The Cashew code is, of course and as always, available for a launchpad to the Mango version, if it happens.
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Chris Nicholson-Sauls |
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qbert
Joined: 30 Mar 2004
Posts: 209
Location: Dallas, Texas
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| Posted: Thu May 25, 2006 9:05 am Post subject: |
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Seconded.
These really should be provided by the language but untill then some good array templates are needed.
I'd also suggest 'bool contains' to search an array, 'T[] unique' , given two arrays would return a unique result set.
Charlie |
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csauls
Joined: 27 Mar 2004
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| Posted: Thu May 25, 2006 12:13 pm Post subject: |
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| qbert wrote: | | 'T[] unique' , given two arrays would return a unique result set. |
It may be that I just got out of bed, but I'm not sure I quite grasp what you mean. Is it to be something along the lines of PHP's array_diff() function?
http://us2.php.net/manual/en/function.array-diff.php
And also let me add a couple more suggestions myself: .intersect(T[], ...) and, if someone can come up with a good way to pull it off, a .filter(T[], ?) and .map(T{}, ?) ... my ColdC background just won't let me live without the looping expressions (map, hash, find, and filter).
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Chris Nicholson-Sauls |
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qbert
Joined: 30 Mar 2004
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Location: Dallas, Texas
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| Posted: Thu May 25, 2006 12:22 pm Post subject: |
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Almost , i mean like php's array_unique http://us2.php.net/manual/en/function.array-unique.php . I said it wrong earlier, it operates on just one array.
filter and intersect sound good.
I actually tried to implement most of those array_* php functions with templates , but ran into trouble when it got up to about 50+ templates. I can't remember exactly what the error was, I still have the code Ill try to dig it up.
Charlie |
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csauls
Joined: 27 Mar 2004
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| Posted: Thu May 25, 2006 10:32 pm Post subject: |
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Ahh, I get you then. Although, maybe .diff() would be good too, although it should probably return a new array rather than modify the source inline, since it'd act on more than one array.
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Edit: I just added some of this to Cashew's utils. New functions:
bool contains (haystack, needle)
T[] diff (alpha, beta)
T[] intersect (alpha, beta)
void unique (haystack)
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csauls
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