大约有 44,000 项符合查询结果（耗时：0.0465秒） [XML]
How to get all subsets of a set? (powerset)
... to for i in range(1, 1 << x).
Returning to this years later, I'd now write it like this:
def powerset(s):
x = len(s)
masks = [1 << i for i in range(x)]
for i in range(1 << x):
yield [ss for mask, ss in zip(masks, s) if i & mask]
And then the test code...
Remove files from Git commit
...to leave them out from the commit:
git reset HEAD path/to/unwanted_file
Now commit again, you can even re-use the same commit message:
git commit -c ORIG_HEAD
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How to search contents of multiple pdf files?
...
oh that's cool, glad to know there are advantages to this even though it is much less obvious to most people wtf it is doing
– sjr
Oct 16 '13 at 4:30
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Why is there no String.Empty in Java?
...e 2nd one it needs to do some kind of check to figure out "hey, I already know about this string from back over here". I'm admittedly no expert in the java compiler, but how could this NOT be the case? And I would think skipping that check would result in a minuscule improvement in compile times.
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Using ChildActionOnly in MVC
... ViewBag.Message = "This is from Index()";
var model = DateTime.Now;
return View(model);
}
[ChildActionOnly]
public PartialViewResult MyDateTime()
{
ViewBag.Message = "This is from MyDateTime()";
var model = DateTime.Now;
return PartialVie...
Elastic Search: how to see the indexed data
...utocomplete.
Note: Sense was originally a standalone chrome plugin but is now part of the Marvel project.
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How do I deal with certificates using cURL while trying to access an HTTPS url?
...hub.com/cfg/apt-cyg/master/apt-cyg -k
and no error message. As a bonus, now I have apt-cyg installed. And ca-certificates.
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How do you write tests for the argparse portion of a python module? [closed]
...th parameter args=sys.argv[1:]. It already calls the ArgumentParser.parse_known_args-method. With argument args==None it will obtain them with args = _sys.argv[1:] where _sys is an alias for sys. (It might be an update since the answer was posted.)
– Thomas Fauskanger
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How to get IP address of the device from code?
...oid) file. I've run this code only on few devices and Emulator but let me know here if you find weird results.
// AndroidManifest.xml permissions
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
//...
What is output buffering?
...processes the HTML.
All the fancy stuff we can do with PHP strings, we can now do with our whole HTML page as one variable.
If you've ever encountered the message "Warning: Cannot modify header information - headers already sent by (output)" while setting cookies, you'll be happy to know that output...