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SEH stack 结构探索（1）--- 从 SEH 链的最底层（线程第1个SEH结构）说起 -...
... (772e9cdf)
772e9d0a ff750c push dword ptr [ebp+0Ch]
772e9d0d ff7508 push dword ptr [ebp+8]
772e9d10 e806000000 call ntdll32!__RtlUserThreadStart (772e9d1b)
772e9d15 cc int 3
772e9d16 90 nop
772e9d17 90 nop
772e...
How to convert DOS/Windows newline (CRLF) to Unix newline (LF) in a Bash script?
...d 's/^M$//' # in bash/tcsh, press Ctrl-V then Ctrl-M
sed 's/\x0D$//' # works on ssed, gsed 3.02.80 or higher
# IN UNIX ENVIRONMENT: convert Unix newlines (LF) to DOS format.
sed "s/$/`echo -e \\\r`/" # command line under ksh
sed 's/$'"/`echo \\\r`/" # ...
How to check if remote branch exists on a given remote repository?
...ote --heads https://github.com/rails/rails.git
5b3f7563ae1b4a7160fda7fe34240d40c5777dcd refs/heads/1-2-stable
81d828a14c82b882e31612431a56f830bdc1076f refs/heads/2-0-stable
b5d759fd2848146f7ee7a4c1b1a4be39e2f1a2bc refs/heads/2-1-stable
c6cb5a5ab00ac9e857e5b2757d2bce6a5ad14b32 refs/heads/...
Fastest way to extract frames using ffmpeg?
...ideo 38m07s long:
time ffmpeg -i input.mp4 -filter:v fps=fps=1/60 ffmpeg_%0d.bmp
1m36.029s
This takes long because ffmpeg parses the entire video file to get the desired frames.
time for i in {0..39} ; do ffmpeg -accurate_seek -ss `echo $i*60.0 | bc` -i input.mp4 -frames:v 1 period_down_$i.bm...
How can I generate an ObjectId with mongoose?
...library :
const bson = require('bson');
new bson.ObjectId(); // 5cabe64dcf0d4447fa60f5e2
Note: There is also an npm project named bson-objectid being even lighter
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Remove files from Git commit
... case), and set the command as fixup:
pick 35c23c2 the first commit
fixup 0d78b28 remove unwanted files
You should be good after saving the file.
To finish :
git push -f
If you unfortunately get conflicts, you have to solve them manually.
...
Build tree array from flat array in javascript
...ance with functional programming (no mutations)
– Dac0d3r
Apr 29 at 20:54
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How to write a simple database engine [closed]
... answered Jun 30 '09 at 7:13
a_m0da_m0d
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What is base 64 encoding used for?
...e data bloats three-fold.
Hexadecimal: store the bytes as hex pairs: AC 47 0D 1A etc. where each byte is represented by 2 bytes. The data bloats two-fold.
Base-64 maps 3 bytes (8 x 3 = 24 bits) in 4 characters that span 6-bits (6 x 4 = 24 bits). The result looks something like "TWFuIGlzIGRpc3Rpb.....
Avoid trailing zeroes in printf()
...ssues that need debugging, left as an exercise for the reader):
printf("%.0d%.4g\n", (int)f/10, f-((int)f-(int)f%10));
It's slightly programmatic but at least it doesn't make you do any string manipulation.
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