大约有 30,000 项符合查询结果（耗时：0.0325秒） [XML]
What is the best way to count “find” results?
...'s bench a bit :
$ ls -1
a
e
l
ll.sh
r
t
y
z
My snippet benchmark :
$ time find -type f -printf '.' | wc -c
8
real 0m0.004s
user 0m0.000s
sys 0m0.007s
With full lines :
$ time find -type f | wc -l
8
real 0m0.006s
user 0m0.003s
sys 0m0.000s
So my solution is faster =) ...
Replacing instances of a character in a string
...ork (+1), but is quite inefficient, as you are creating a new string every time you encounter a ';'
– inspectorG4dget
Oct 4 '12 at 9:08
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Why can't C compilers rearrange struct members to eliminate alignment padding? [duplicate]
...Header {
uint32_t signature;
uint16_t minVersion, flag, method, modTime, modDate;
uint32_t crc32, compressedSize, uncompressedSize;
uint16_t nameLength, extraLength;
};
The packed attribute prevents the compiler from aligning the fields according to their natural alignment, and it ...
How to set up tmux so that it starts up with specified windows opened?
...split-window -h
tmux new-window 'mutt'
tmux -2 attach-session -d
So everytime I want to launch my favorite dev environment I can just do
$ dev-tmux
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How to save and restore multiple different sessions in Vim?
...m after saving the session assuming that I'll take up from there. But next time I opened the session, the changes I had made to the files were gone.
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Do HttpClient and HttpClientHandler have to be disposed between requests?
... container and register an instance of HttpClient as a singleton. The lifetime of the instance would then be scoped to that of the lifetime of the container. This could be scoped at the application level or perhaps per request in a web application.
– David Peden
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What's the fastest way to merge/join data.frames in R?
...r R session constitute the data base, not the tables in sqlite. Thus each time the code refers to an unqualified table name it will look in your R workspace for it -- not in sqlite's main database. Thus the select statement that was shown reads d1 and d2 from the workspace into sqlite's main datab...
Printing without newline (print 'a',) prints a space, how to remove?
... @katrielalex Wrong, string concatenation using += in Python is a constant time operation for concatenation of a single character.
– moinudin
Dec 21 '10 at 13:06
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How does Stack Overflow generate its SEO-friendly URLs?
... I figured I'd optimize it because this function can be called hundreds of times per page.
/// <summary>
/// Produces optional, URL-friendly version of a title, "like-this-one".
/// hand-tuned for speed, reflects performance refactoring contributed
/// by John Gietzen (user otac0n)
/// <...
C/C++ line number
... all C++ compilers support it)
__DATE__ : a string of form "Mmm dd yyyy"
__TIME__ : a string of form "hh:mm:ss"
Your code will be :
if(!Logical)
printf("Not logical value at line number %d in file %s\n", __LINE__, __FILE__);
...