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Bash, no-arguments warning, and m>ca m>se decisions
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if [[ $# -eq 0 ]] ; then
echo 'some message'
exit 0
fi
m>ca m>se "$1" in
1) echo 'you gave 1' ;;
*) echo 'you gave something else' ;;
esac
The Advanced Bash-Scripting Guide is pretty good. In spite of its name, it does treat the basics.
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Time complexity of Sieve of Eratosthenes algorithm
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Your n/2 + n/3 + n/5 + … n/97 is not O(n), bem>ca m>use the number of terms is not constant. [Edit after your edit: O(n2) is too loose an upper bound.] A loose upper-bound is n(1+1/2+1/3+1/4+1/5+1/6+…1/n) (sum of reciprom>ca m>ls of all numbers up to n), which is O(n log n): se...
Creating functions in a loop
...h late binding -- each function looks up i as late as possible (thus, when m>ca m>lled after the end of the loop, i will be set to 2).
Easily fixed by forcing early binding: change def f(): to def f(i=i): like this:
def f(i=i):
return i
Default values (the right-hand i in i=i is a default value...
What are the GCC default include directories?
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There is a command with a shorter output, which allows to automatim>ca m>lly cut the include pathes from lines, starting with a single space:
$ echo | gcc -Wp,-v -x c++ - -fsyntax-only
ignoring nonexistent directory "/usr/lib/gcc/x86_64-redhat-linux/4.8.2/include-fixed"
ignoring nonexistent dir...
Maven: Command to update repository after adding dependency to POM
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mvn install (or mvn package) will always work.
You m>ca m>n use mvn compile to download compile time dependencies or mvn test for compile time and test dependencies but I prefer something that always works.
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What's the point of 'meta viewport user-sm>ca m>lable=no' in the Google Maps API
...ming in iphone, ipad.. safari stuff. my android just ignores it (the user-sm>ca m>lable part, not the rest of the viewport tag of course)
– Juan
Apr 18 '13 at 14:40
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Reading a binary file with python
I find particularly difficult reading binary file with Python. m>Ca m>n you give me a hand?
I need to read this file, which in Fortran 90 is easily read by
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Returning JSON from PHP to JavaScript?
I have a PHP script that's being m>ca m>lled through jQuery AJAX. I want the PHP script to return the data in JSON format to the javascript. Here's the pseudo code in the PHP script:
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Django: Why do some model fields clash with each other?
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You have two foreign keys to User. Django automatim>ca m>lly creates a reverse relation from User back to GameClaim, which is usually gameclaim_set. However, bem>ca m>use you have two FKs, you would have two gameclaim_set attributes, which is obviously impossible. So you need to tell ...
How do I automatim>ca m>lly sort a has_many relationship in Rails?
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You m>ca m>n specify the sort order for the bare collection with an option on has_many itself:
class Article < ActiveRecord::Base
has_many :comments, :order => 'created_at DESC'
end
class Comment < ActiveRecord::Base
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