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Using NSPredicate to filter an NSArray based on NSDictionary keys
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answered Jun 6 '09 at 0:18
surakensuraken
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How to force LINQ Sum() to return 0 while source collection is empty
...uery throws an exception. In that case I'd prefer to have the sum equalize 0 rather than an exception being thrown.
Would this be possible in the query itself - I mean rather than storing the query and checking query.Any() ?
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Dictionaries and default values
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edited Jan 23 '19 at 5:30
Solomon Ucko
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answere...
How to check if PHP array is associative or sequential?
...w to determine whether an array has sequential numeric keys, starting from 0
Consider which of these behaviours you actually need. (It may be that either will do for your purposes.)
The first question (simply checking that all keys are numeric) is answered well by Captain kurO.
For the second qu...
Upload file to FTP using C#
...ernatives
– Pacharrin
Apr 16 '19 at 0:29
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inserting characters at the start and end of a string
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answered Apr 8 '12 at 0:47
Mark ByersMark Byers
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Handling Touch Event in UILabel and hooking it up to an IBAction
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Scott PersingerScott Persinger
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Mod of negative number is melting my brain
...ould write it as
int mod(int x, int m) {
int r = x%m;
return r<0 ? r+m : r;
}
or variants thereof.
The reason it works is that "x%m" is always in the range [-m+1, m-1]. So if at all it is negative, adding m to it will put it in the positive range without changing its value modulo m.
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How do I break out of a loop in Scala?
...f loops.
Suppose you want to sum numbers until the total is greater than 1000. You try
var sum = 0
for (i <- 0 to 1000) sum += i
except you want to stop when (sum > 1000).
What to do? There are several options.
(1a) Use some construct that includes a conditional that you test.
var sum...
Pip freeze vs. pip list
...ecific format for pip to understand, which is
feedparser==5.1.3
wsgiref==0.1.2
django==1.4.2
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That is the "requirements format".
Here, django==1.4.2 implies install django version 1.4.2 (even though the latest is 1.6.x).
If you do not specify ==1.4.2, the latest version available would be in...