大约有 30,000 项符合查询结果（耗时：0.0366秒） [XML]
What's the rationale for null terminated strings?
...oblems when treating them as a bunch of
bytes).
length is known at compile time for constant literal strings (sizeof). So why would
anyone want to store it in memory prepending it to actual data ?
in a way C is doing as (nearly) everyone else, strings are viewed as arrays of char. As array length is...
Using Python String Formatting with Lists
...ke the numerical values of 0, 1 and 2 are somehow related to the number of times the word "BLAH" appears.
– SabreWolfy
Apr 21 at 13:30
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sho...
Replace all non Alpha Numeric characters, New Lines, and multiple White Space with one Space
...;
Each run consisted of 50 or more sample on each regex, and i run them 5 times on each browser.
Lets race our horses!
Results
Chrome Edge
Chars Pattern Ops/Sec Deviation Op/Sec Deviation
-----------------------------...
.NET / C# - Convert char[] to string
... Compiler does it automatically as chars type is known on compile time.
– Semen Miroshnichenko
Aug 3 '17 at 15:15
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How to use double or single brackets, parentheses, curly braces
... square brackets seem to evaluate quite a lot quicker than single ones.
$ time for ((i=0; i<10000000; i++)); do [[ "$i" = 1000 ]]; done
real 0m24.548s
user 0m24.337s
sys 0m0.036s
$ time for ((i=0; i<10000000; i++)); do [ "$i" = 1000 ]; done
real 0m33.478s
user 0m33.478s
sys 0m0....
LEN function not including trailing spaces in SQL Server
...ing a inconsistent method (in some case you divide its result by 2 and sometimes not) is a better option. Maybe is there a near to zero performance hit with my method though.
– Serge
Mar 25 '13 at 12:35
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What is boilerplate code?
...
@KorayTugay Some times boilerplate is not easy to avoid. For example, you can avoid to repeat main function in your project by using only one and manage your whole project with it. In web development we could avoid the html5 template in each ...
String concatenation vs. string substitution in Python
...here's no option but to use interpolation/templating.
>>> import timeit
>>> def so_q_sub(n):
... return "%s%s/%d" % (DOMAIN, QUESTIONS, n)
...
>>> so_q_sub(1000)
'http://stackoverflow.com/questions/1000'
>>> def so_q_cat(n):
... return DOMAIN + QUESTIONS + '/' ...
How to disassemble one single function using objdump?
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The man page isn't definitive. For a long time it wasn't really maintained, but now I think it's generated from the main docs. Also "gdb --help" is more complete now too.
– Tom Tromey
Oct 18 '14 at 2:33
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How to determine whether a Pandas Column contains a particular value
... did a few simple tests:
In [10]: x = pd.Series(range(1000000))
In [13]: timeit 999999 in x.values
567 µs ± 25.6 µs per loop (mean ± std. dev. of 7 runs, 1000 loops each)
In [15]: timeit x.isin([999999]).any()
9.54 ms ± 291 µs per loop (mean ± std. dev. of 7 runs, 100 loops each)
In [16]:...