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Do I need to manually close an ifstream?
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edited Jun 20 at 9:12
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answered Apr 14 '09 at 15:09
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Check if array is empty or null
...to check if an array is empty or null in jQuery. I tried array.length === 0 but it didn't work. It did not throw any error either.
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Stream vs Views vs Iterators
...very hard to support in a general manner, and they didn't make version 2.8.0.
Views are meant to be viewed much like a database view. It is a series of transformation which one applies to a collection to produce a "virtual" collection. As you said, all transformations are re-applied each time you n...
List distinct values in a vector in R
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answered Oct 13 '11 at 14:08
csgillespiecsgillespie
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Adding data attribute to DOM
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edited Sep 20 '17 at 6:46
ankit suthar
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How to concatenate twice with the C preprocessor and expand a macro as in “arg ## _ ## MACRO”?
...u need the equivalent trick with the stringizing operator too.
Section 6.10.3 of the C99 standard covers 'macro replacement', and 6.10.3.1 covers 'argument substitution'.
After the arguments for the invocation of a function-like macro have been identified,
argument substitution takes place. A...
Argparse optional positional arguments?
...tion='store_true')
_StoreTrueAction(option_strings=['-v'], dest='v', nargs=0, const=True, default=False, type=None, choices=None, help=None, metavar=None)
>>> parser.add_argument('dir', nargs='?', default=os.getcwd())
_StoreAction(option_strings=[], dest='dir', nargs='?', const=None, defaul...
no new variables on left side of :=
...ogendra Singh
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Showing data values on stacked bar chart in ggplot2
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From ggplot 2.2.0 labels can easily be stacked by using position = position_stack(vjust = 0.5) in geom_text.
ggplot(Data, aes(x = Year, y = Frequency, fill = Category, label = Frequency)) +
geom_bar(stat = "identity") +
geom_text(size =...
Dealing with float precision in Javascript [duplicate]
... IEEE 754 can exactly represent integers up to something like 2^50. So, if you're working within a known range, you can scale your values to take advantage of the 50 bits (or whatever) of precision, instead of wasting the precision normally reserved for large numbers.
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