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Does the ternary operator exist in R?
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306
As if is function in R and returns the latest evaluation, if-else is equivalent to ?:.
> a ...
How to easily resize/optimize an image size with iOS?
...one disk. Some of those images are pretty big in size (widths larger than 500 pixels, for instance). Since the iPhone doesn't even have a big enough display to show the image in its original size, I'm planning on resizing the image to something a bit smaller to save on space/performance.
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How to implement has_many :through relationships with Mongoid and mongodb?
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edited Aug 13 '11 at 20:31
answered Aug 13 '11 at 20:06
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BigDecimal - to use new or valueOf
...an be somewhat unpredictable. One might assume that writing new BigDecimal(0.1) in Java creates a BigDecimal which is exactly equal to 0.1 (an unscaled value of 1, with a scale of 1), but it is actually equal to 0.1000000000000000055511151231257827021181583404541015625. This is because 0.1 cannot be...
.NET Global exception handler in console application
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edited May 29 '18 at 14:05
answered Jun 28 '10 at 14:32
H...
“x not in y” or “not x in y”
... 'ham' not in 'spam and eggs'
>>> dis.dis(notin)
2 0 LOAD_CONST 1 ('ham')
3 LOAD_CONST 2 ('spam and eggs')
6 COMPARE_OP 7 (not in)
9 POP_TOP
10 LOAD_CONST ...
Are lists thread-safe?
...to concurrently access, the lists's data is not protected. For example:
L[0] += 1
is not guaranteed to actually increase L[0] by one if another thread does the same thing, because += is not an atomic operation. (Very, very few operations in Python are actually atomic, because most of them can cau...
What exactly is nullptr?
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410
How is it a keyword and an instance of a type?
This isn't surprising. Both true and false a...
Multiple inputs with same name through POST in php
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220
Change the names of your inputs:
<input name="xyz[]" value="Lorem" />
<input name="xyz...