大约有 43,000 项符合查询结果（耗时：0.0686秒） [XML]
Why doesn't list have safe “get” method like dictionary?
...sociated with names) where it is inefficient to check if a key is present (and return its value) without throwing an exception, while it is super trivial to avoid exceptions accessing list elements (as the len method is very fast). The .get method allows you to query the value associated with a nam...
Parallelize Bash script with maximum number of processes
...ution. Except, since I'm paranoid, I always like to use find [...] -print0 and xargs -0.
– amphetamachine
Mar 22 '10 at 2:31
7
...
C++ equivalent of StringBuffer/StringBuilder?
Is there a C++ Standard Template Library class that provides efficient string concatenation functionality, similar to C#'s StringBuilder or Java's StringBuffer ?
...
Short circuit Array.forEach like calling break
... new forEach method in JavaScript? I've tried return; , return false; and break . break crashes and return does nothing but continue iteration.
...
Prevent onmouseout when hovering child element of the parent absolute div WITHOUT jQuery
...tion onMouseOut(event) {
//this is the original element the event handler was assigned to
var e = event.toElement || event.relatedTarget;
if (e.parentNode == this || e == this) {
return;
}
alert('MouseOut');
// handle mouse event here!
}
document...
Count number of lines in a git repository
...at you want:
git ls-files | xargs cat | wc -l
But with more information and probably better, you can do:
git ls-files | xargs wc -l
share
|
improve this answer
|
follow
...
XPath to select element based on childs child value
...her
./book[author/name = 'John']
or
./book[./author/name = 'John']
and you will match your element. Your current predicate goes back to the root of the document to look for an author.
share
|
...
Stripping everything but alphanumeric chars from a string in Python
...intable (part of the built-in string module). The use of compiled '[\W_]+' and pattern.sub('', str) was found to be fastest.
$ python -m timeit -s \
"import string" \
"''.join(ch for ch in string.printable if ch.isalnum())"
10000 loops, best of 3: 57.6 usec per loop
$ python -m timeit -...
How do I select text nodes with jQuery?
...earlier, the code above will not work. To fix this, replace addBack() with andSelf(). andSelf() is deprecated in favour of addBack() from 1.8 onwards.
This is somewhat inefficient compared to pure DOM methods and has to include an ugly workaround for jQuery's overloading of its contents() function ...
How to see the changes between two commits without commits in-between?
... The advantage of using git apply vs. patch is you can include renames and some other changes that are specific to git. I like using git format-patch and git am.
– Russell
Jun 12 '12 at 11:23
...