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Pick a random element from an array
...t(arc4random_uniform(UInt32(array.count)))
print(array[randomIndex])
The castings are ugly, but I believe they're required unless someone else has another way.
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How to check for an undefined or null variable in JavaScript?
...s the truthiness. Which FYI is also equivalent to if (var) which will be cast to boolean, so basically completely useless...
– Cyril CHAPON
Jun 26 '18 at 9:42
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How do I update a Linq to SQL dbml file?
... I had tried 1a and 1c without 1b and was getting 'Specified cast is not valid' errors when performing a simple select on a view. Including 1b fixed it for me
– tomfumb
Nov 29 '11 at 19:40
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@selector() in Swift?
...unction has no parameters, the only way to disambiguate it is to use an as cast with the function's type signature (e.g. foo as () -> () vs foo(_:)).
There's a special syntax for property getter/setter pairs in Swift 3.0+. For example, given a var foo: Int, you can use #selector(getter: MyClass.f...
Which exception should I raise on bad/illegal argument combinations in Python?
...string knowing that non-empty strings are always True. It might save him a cast.
If the arguments have invalid values, raise ValueError. This seems more appropriate in your case:
if recurse and not save:
raise ValueError("If recurse is True, save should be True too")
Or in this specific case...
How do you trigger a block after a delay, like -performSelector:withObject:afterDelay:?
...a floating-point arithmetic, yielding 500000000.0, before it is explicitly casted back to a 64-bit integer. So it's perfectly acceptable to use a fraction of NSEC_PER_SEC.
– junjie
Jul 2 '17 at 14:05
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Where is the itoa function in Linux?
... point string; floating point can have corner case inaccuracies. And don't cast calloc
– M.M
Sep 24 '14 at 12:44
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Entity Framework: There is already an open DataReader associated with this Command
...ption can be thrown before second reader is executed). You can also try to cast the query to ObjectQuery and call ToTraceString to see the SQL command. It is hard to track. I always turn on MARS.
– Ladislav Mrnka
Feb 1 '11 at 22:27
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Matplotlib tight_layout() doesn't take into account figure suptitle
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Casting fig.tight_layout(rect=[0, 0.03, 1, 0.95]) also works.
– soupault
Sep 16 '15 at 13:06
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Convert an enum to List
... Type t = typeof(T);
return !t.IsEnum ? null : Enum.GetValues(t).Cast<Enum>().Select(x => x.GetDescription()).ToList();
}
When you call this helper you will get the list of item descriptions.
List<string> items = HelperMethods.GetListOfDescription<CancelReasonEnum...