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How to use range-based for() loop with std::map?
...ured bindings, which allows for the following:
std::map< foo, bar > testing = { /*...blah...*/ };
for ( const auto& [ k, v ] : testing )
{
std::cout << k << "=" << v << "\n";
}
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Ignore python multiple return value
... It doesn't call the function multiple times: >>> def test(): ... print "here" ... return 1,2,3 ... >>> a,b = test()[:2] here [edit: sorry that code didn't come through, aparently you only get one line in comments. For those not familiar >>> and ... a...
Django filter versus get for single object?
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That test is pretty unfair. A large part of the overhead in throwing an exception is the handling of the stack trace. That test had a stack length of 1 which is much lower than you would usually find in an application.
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What is the Linux equivalent to DOS pause?
..., 0 correct input. Put $? in a variable as soon as possible if you need to test it after somes commands, because all commands would rewrite $?
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source command not found in sh shell
... For compatibility with Mac OS (dev environment) and Travis-CI (testing environment), I had to use . ./filename. Otherwise, I would get a sh: 1: .: filename: not found error when running tests on Travis-CI.
– Adrien Joly
Aug 18 '17 at 12:27
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What's quicker and better to determine if an array key exists in PHP?
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If you are interested in some tests I've done recently:
https://stackoverflow.com/a/21759158/520857
Summary:
| Method Name | Run time | Difference
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How to elegantly check if a number is within a range?
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Do you mean?
if(number >= 1 && number <= 100)
or
bool TestRange (int numberToCheck, int bottom, int top)
{
return (numberToCheck >= bottom && numberToCheck <= top);
}
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How to check if a process is running via a batch script
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This solution works well - tested in Windows 8.1. I did notice that it is case-sensitive.
– oliver-clare
Dec 2 '14 at 11:18
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Count occurrences of a char in a string using Bash
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Building on everyone's great answers and comments, this is the shortest and sweetest version:
grep -o "$needle" <<< "$haystack" | wc -l
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Any reason not to use '+' to concatenate two strings?
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I have done a quick test:
import sys
str = e = "a xxxxxxxxxx very xxxxxxxxxx long xxxxxxxxxx string xxxxxxxxxx\n"
for i in range(int(sys.argv[1])):
str = str + e
and timed it:
mslade@mickpc:/binks/micks/ruby/tests$ time python /binks/m...