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Using bitwise OR 0 to floor a number
...twise operations except unsigned right shift, >>>, work on signed 32-bit integers. So using bitwise operations will convert a float to an integer.
Does it have any advantages over doing Math.floor? Maybe it's a bit
faster? (pun not intended)
http://jsperf.com/or-vs-floor/2 seems sli...
ipython reads wrong python version
...hon
if __name__ == '__main__':
sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
sys.exit(start_ipython())
And mine works properly like this, but my situation isn't exactly like the OP's.
Original answer -- 9/30/13:
cat /usr/local/bin/ipython
#!/usr/bin/python
# EASY-I...
'float' vs. 'double' precision
...question of how many digits can be stored in a binary integer: an unsigned 32 bit integer can store integers with up to 32 bits, which doesn't precisely map to any number of decimal digits: all integers of up to 9 decimal digits can be stored, but a lot of 10-digit numbers can be stored as well.
...
App Inventor 2 FTP 客户端拓展：FTP协议连接、上传、下载、创建、修改目录...
...位于该路径中，则只需输入文件名称即可。目标路径可以是: /mnt/sdcard/my_file.txt。操作完成后会触发 DownloadFileFinished 事件。
UploadFile(srcFilePath,desFileName)
上传文件。例如：/public_html/my_directory/my_file.txt。如果位于该路径中，则只...
ElasticSearch, Sphinx, Lucene, Solr, Xapian. Which fits for which usage? [closed]
... Sayed Mohd Ali
1,97833 gold badges77 silver badges2323 bronze badges
answered Feb 18 '10 at 11:31
kimchykimchy
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“The Controls collection cannot be modified because the control contains code blocks”
...
John Saunders
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answered Apr 20 '11 at 9:12
Jonas StensvedJon...
How to hide columns in HTML table?
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answered May 8 '15 at 8:32
souvik settsouvik sett
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What does string::npos mean in this code?
...
size_t is unsigned int for 32 bit compiler; unsigned long long int for 64 bit compiler.. Setting it to -1 makes it have the max val of that unsigned type.
– sudheerbb
Jan 21 at 10:26
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How does C compute sin() and other math functions?
...ion or branching is rather clever. But there's no comment at all!
Older 32-bit versions of GCC/glibc used the fsin instruction, which is surprisingly inaccurate for some inputs. There's a fascinating blog post illustrating this with just 2 lines of code.
fdlibm's implementation of sin in pure C ...
Ruby equivalent of virtualenv?
...plicit versions of these dependencies into an isolated location
use bundle exec to run your application
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