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What is the difference between an int and a long in C++?
...me, but for example on Alpha systems a long was 64 bits whereas an int was 32 bits. This article covers the rules for the Intel C++ compiler on variable platforms. To summarize:
OS arch size
Windows IA-32 4 bytes
Windows Intel 64 4 bytes
Windows ...
Rails Migration: Remove constraint
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Paul SturgessPaul Sturgess
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CSS selector for first element with class
...k (see here for an explanation), that is simply not true.
Selectors level 3 introduces a :first-of-type pseudo-class, which represents the first element among siblings of its element type. This answer explains, with illustrations, the difference between :first-child and :first-of-type. However, as ...
How persistent is localStorage?
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answered Mar 30 '12 at 19:33
JosephJoseph
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Chrome Extension Message passing: response not sent
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Difference between modes a, a+, w, w+, and r+ in built-in open function?
...e then current end of file,
irrespective of any intervening fseek(3) or similar.
``a+'' Open for reading and writing. The file is created if it does not
exist. The stream is positioned at the end of the file. Subse-
quent writes to the file will always end up at the ...
Is R's apply family more than syntactic sugar?
... makeSOCKcluster(c("localhost","localhost"))
parSapply(cl, 1:20, get("+"), 3)
This example uses a socket cluster, for which no additional software needs to be installed; otherwise you will need something like PVM or MPI (see Tierney's clustering page). snow has the following apply functions:
par...
Why does 2 mod 4 = 2?
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edited Aug 29 '09 at 17:33
Joe Phillips
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How to get a random value from dictionary in python
...l work in Python 2.x where d.keys() is a list, but it won't work in Python 3.x where d.keys() is an iterator. You should do random.choice(list(d.keys())) instead.
– Duncan
Feb 1 '11 at 9:42
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Java resource as file
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I agree it's annoying - but it makes ClassLoader more widely applicable in other ways. For instance, it's easy to write a "web classloader" ...