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Is git's semi-secret empty tree object reliable, and why is there not a symbolic name for it?
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git hash-object -t tree /dev/null
Or, as Ciro Santilli proposes in the comments:
printf '' | git hash-object --stdin -t tree
Or, as seen here, from Colin Schimmelfing:
git hash-object -t tree --stdin < /dev/null
So I guess it is safer to define a variable with the result of that command...
What's the complete range for Chinese characters in Unicode?
...U+23100 - U+245FF
U+24600 - U+260FF
U+26100 - U+275FF
U+27600 - U+290FF
U+29100 - U+2A6DF
3) 4149 characters from the CJKUI Ext C block.
Code points U+2A700 to U+2B734. Unicode 5.2 (2009).
4) 222 characters from the CJKUI Ext D block.
Code points U+2B740 to U+2B81D. Unicode 6.0 (2010).
5) CJKU...
Is it worth using Python's re.compile?
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Daniel Standage
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answered Jan 16 '09 at 21:42
TriptychTriptych
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Is D a credible alternative to Java and C++? [closed]
... kfmfe04
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answered Oct 30 '08 at 15:30
philsquaredphilsquared
21.5k12...
Resolve build errors due to circular dependency amongst classes
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Tony DelroyTony Delroy
91k1010 gold badges149149 silver badges219219 bronze badges
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Position of least significant bit that is set
...nch.c -o bench.exe -std=c99 -Wall -O2
$ bench
Naive loop. Time = 2.91 (Original questioner)
De Bruijn multiply. Time = 1.16 (Tykhyy)
Lookup table. Time = 0.36 (Andrew Grant)
FFS instruction. Time = 0.90 (ephemient)
Branch free mask. Time = 3.48 (Dan / Jim Balter)
Double hack....
When is it appropriate to use UDP instead of TCP? [closed]
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Jarvis
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answered Jul 8 '09 at 18:08
S.LottS.Lott
3...
What is the difference between “JPG” / “JPEG” / “PNG” / “BMP” / “GIF” / “TIFF” Image?
...mat)
Image formats can be separated into three broad categories:
lossy compression,
lossless compression,
uncompressed,
Uncompressed formats take up the most amount of data, but they are exact representations of the image. Bitmap formats such as BMP generally are uncompressed, although there a...
Data structure: insert, remove, contains, get random element, all at O(1)
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Tony DelroyTony Delroy
91k1010 gold badges149149 silver badges219219 bronze badges
a...
What characters are valid for JavaScript variable names?
...5\u0a36\u0a38\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0\u0ae1\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b5c\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0...