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Clang vs GCC - which produces faster binaries? [closed]
...(speed, memory footprint, reliability) of binaries it produces - if gcc -O3 can produce a binary that runs 1% faster, or Clang binaries take up more memory or just fail due to compiler bugs, it's a deal-breaker.
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I need to generate uuid for my rails application. What are the options(gems) I have? [duplicate]
I use
Rails 3.0.20 and
ruby 1.8.7 (2011-06-30 patchlevel 352)
4 Answers
4
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Most efficient way of making an if-elif-elif-else statement when the else is done the most?
...:
the_thing = 2
elif something == 'there':
the_thing = 3
else:
the_thing = 4
2.py
something = 'something'
options = {'this': 1, 'that': 2, 'there': 3}
for i in xrange(1000000):
the_thing = options.get(something, 4)
3.py
something = 'something'
options = {'t...
Fast permutation -> number -> permutation mapping algorithms
I have n elements. For the sake of an example, let's say, 7 elements, 1234567. I know there are 7! = 5040 permutations possible of these 7 elements.
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In Clojure, when should I use a vector over a list, and the other way around?
...: no, but they are sequential
[12:21] <rhickey> ,(sequential? [1 2 3])
[12:21] <clojurebot> true
[12:22] <Raynes> When would you want to use a list over a vector?
[12:22] <rhickey> when generating code, when generating back-to-front
[12:23] <rhickey> not too...
The 'json' native gem requires installed build tools
I have ruby 1.9.2p180 (2011-02-18) [i386-mingw32] installed on my windows 7 machine. Now I tried to install the JSON gem using the command, "gem install json" and got the following error.
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Bundler: Command not found
I am hosting on a vps, ubuntu 10.04, rails 3, ruby and mysql installed correctly by following some tutorials. If I run bundle check or bundle install I get the error '-bash: bundle: command not found'. From gem list --local I see 'bundler (1.0.2, 1.0.0)' is installed.
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Removing numbers from string [closed]
... |
edited Oct 12 '12 at 3:54
answered Oct 12 '12 at 3:34
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Getting a map() to return a list in Python 3.x
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Do this:
list(map(chr,[66,53,0,94]))
In Python 3+, many processes that iterate over iterables return iterators themselves. In most cases, this ends up saving memory, and should make things go faster.
If all you're going to do is iterate over thi...
not None test in Python [duplicate]
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1033
if val is not None:
# ...
is the Pythonic idiom for testing that a variable is not set to...