大约有 43,000 项符合查询结果（耗时：0.0295秒） [XML]
How to print to stderr in Python?
...ound this to be the only one short + flexible + portable + readable:
from __future__ import print_function
import sys
def eprint(*args, **kwargs):
print(*args, file=sys.stderr, **kwargs)
The function eprint can be used in the same way as the standard print function:
>>> print("Test...
How to output a multiline string in Bash?
...ters. This seems reasonably portable to me (I ran it on MacOS and Ubuntu)
__usage="
Usage: $(basename $0) [OPTIONS]
Options:
-l, --level <n> Something something something level
-n, --nnnnn <levels> Something something something n
-h, --help ...
In STL maps, is it better to use map::insert than []?
...els natural and is clear to read whereas he preferred map.insert(std::make_pair(key, value)) .
13 Answers
...
Doing something before program exit
...int a message when my application was terminating:
import atexit
def exit_handler():
print 'My application is ending!'
atexit.register(exit_handler)
Just be aware that this works great for normal termination of the script, but it won't get called in all cases (e.g. fatal internal errors).
...
How to count the number of set bits in a 32-bit integer?
... may need to adjust it to work for a particular language (e.g. using uint32_t for C++ and >>> in Java):
int numberOfSetBits(uint32_t i)
{
// Java: use int, and use >>> instead of >>
// C or C++: use uint32_t
i = i - ((i >> 1) & 0x55555555);
i = (...
Getting a map() to return a list in Python 3.x
...o be ASCII/latin-1 is to do bulk conversions at the C layer: bytes(sequence_of_ints_in_range_0_to_256).decode('latin-1') which makes a str faster by avoiding Python function calls for each element in favor of a bulk conversion of all elements using only C level function calls. You can wrap the above...
Why shouldn't I use mysql_* functions in PHP?
What are the technical reasons for why one shouldn't use mysql_* functions? (e.g. mysql_query() , mysql_connect() or mysql_real_escape_string() )?
...
Unable to generate an explicit migration in entity framework
...the database OR you can delete the pending migration file ([201203170856167_left]) from your Migrations folder and then re-run "add-migration" to create a brand new migration based off of your edits.
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Best general SVN Ignore Pattern?
...rmatted for copy and paste:
*.o *.lo *.la #*# .*.rej *.rej .*~ *~ .#* .DS_Store thumbs.db Thumbs.db *.bak *.class *.exe *.dll *.mine *.obj *.ncb *.lib *.log *.idb *.pdb *.ilk *.msi* .res *.pch *.suo *.exp *.*~ *.~* ~*.* cvs CVS .CVS .cvs release Release debug Debug ignore Ignore bin Bin obj Obj *....
Get a random item from a JavaScript array [duplicate]
...ash :)):
var randomArray = [
'#cc0000','#00cc00', '#0000cc'
];
// use _.sample
var randomElement = _.sample(randomArray);
// manually use _.random
var randomElement = randomArray[_.random(randomArray.length-1)];
Or to shuffle an entire array:
// use underscore's shuffle function
var firstRa...