大约有 42,000 项符合查询结果（耗时：0.0538秒） [XML]
How to construct a set out of list items in python?
...]
you can construct the set directly:
s = set(lst)
In fact, set will work this way with any iterable object! (Isn't duck typing great?)
If you want to do it iteratively:
s = set()
for item in iterable:
s.add(item)
But there's rarely a need to do it this way. I only mention it becaus...
Bash script processing limited number of commands in parallel
...;
wait
process5 &
process6 &
process7 &
process8 &
wait
For the above example, 4 processes process1 ... process4 would be started in the background, and the shell would wait until those are completed before starting the next set.
From the GNU manual:
wait [jobspec or pid ...]
...
Merge / convert multiple PDF files into one PDF
...
Just make sure you remember to provide out.pdf, or else it will overwrite the last file in your command, sigh.
– mlissner
Oct 19 '13 at 22:20
10
...
Multiline comment in PowerShell
...
In PowerShell v2 and newer, use the following syntax for the multiline comments:
<# a
b
c #>
share
|
improve this answer
|
follow
...
Git clone without .git directory
...flag to pass to git when doing a clone, say don't clone the .git directory? If not, how about a flag to delete the .git directory after the clone?
...
How can I get zoom functionality for images?
...
android:layout_height="match_parent" />
Note: I've removed my prior answer, which included some very old code and now link straight to the most updated code on github.
ViewPager
If you are interested in putting TouchImageView in a ViewPager, refer to this answer.
...
Process escape sequences in a string in Python
Sometimes when I get input from a file or the user, I get a string with escape sequences in it. I would like to process the escape sequences in the same way that Python processes escape sequences in string literals .
...
How to force Chrome browser to reload .css file while debugging in Visual Studio?
...
There are much more complicated solutions, but a very easy, simple one is just to add a random query string to your CSS include.
Such as src="/css/styles.css?v={random number/string}"
If you're using php or another server-side language, y...
Extract a substring from a string in Ruby using a regular expression
...ing1.scan(/<([^>]*)>/).last.first
scan creates an array which, for each <item> in String1 contains the text between the < and the > in a one-element array (because when used with a regex containing capturing groups, scan creates an array containing the captures for each match)...
Iterate over object attributes in python
...;>> dir(obj)
['__class__', '__delattr__', '__dict__', '__doc__', '__format__', '__getattribute__', '__hash__', '__init__', '__module__', '__new__', '__reduce__', '__reduce_ex__', '__repr__', '__setattr__', '__sizeof__', '__str__', '__subclasshook__', '__weakref__', 'bar', 'foo', 'func']
You ...