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Makefile经典教程（入门必备） - C/C++ - 清泛网移动版 - 专注C/C++及内核技术
...因为我基本上都是在Unix下使用make，以前在SCO Unix和IBM的AIX，现在在Linux、Solaris、HP-UX、AIX和Alpha下使用，Linux和Solaris下更多一点。不过，我可以肯定的是，在Unix下的make，无论是哪种平台，几乎都使用了Richard Stallman开发的make和cc/...
Converting Stream to String and back…what are we missing?
...e arbitrary bytes. You need to use something like a base-n (commonly: base-64) encode. This transfers
arbitrary bytes to a formatted string
a formatted string to the original bytes
look at Convert.ToBase64String and Convert. FromBase64String
...
detach all packages while working in R
...; sessionInfo()
R version 2.13.1 Patched (2011-09-13 r57007)
Platform: x86_64-unknown-linux-gnu (64-bit)
locale:
[1] LC_CTYPE=en_GB.utf8 LC_NUMERIC=C
[3] LC_TIME=en_GB.utf8 LC_COLLATE=en_GB.utf8
[5] LC_MONETARY=C LC_MESSAGES=en_GB.utf8
[7] LC_PAPER=e...
What are allowed characters in cookies?
...hmed Ashour
4,1191010 gold badges2828 silver badges4646 bronze badges
answered Dec 28 '09 at 12:54
bobincebobince
484k9999 gold ba...
Remap values in pandas column with a dict
... @PrestonH It works perfectly for me. Running: '3.6.1 |Anaconda custom (64-bit)| (default, May 11 2017, 13:25:24) [MSC v.1900 64 bit (AMD64)]'
– Dan
Dec 6 '17 at 9:47
...
Convert DataFrame column type from string to datetime, dd/mm/yyyy format
...pd.Series(['05/23/2005']))
Out[11]:
0 2005-05-23 00:00:00
dtype: datetime64[ns]
You can pass a specific format:
In [12]: pd.to_datetime(pd.Series(['05/23/2005']), format="%m/%d/%Y")
Out[12]:
0 2005-05-23
dtype: datetime64[ns]
...
Why is division in Ruby returning an integer instead of decimal value?
...o learn what works best. Here's the benchmark I put together: require 'base64';require 'zlib';puts Zlib.inflate(Base64.decode64("eJxlkMEOwiAQRO98hekFuGzxQEwPXvwR01ZqiYHqBk2Tln8XDlWgnDbM25nJonq9NaoD7ZTtR9PigxK09zM7AkgRHieXTYHOsBNf1nklM6B6TuhYpdp+rPgSdiCOi/d/kQ71QBOtAVFLEDly05+UYQ2H+MckL6z0zioDdJG1S9K...
How can bcrypt have built-in salts?
... the salt and the cipher text, concatenated and encoded in a modified Base-64. The first 22 characters decode to a 16-byte value for the salt. The remaining characters are cipher text to be compared for authentication.
This example is taken from the documentation for Coda Hale's ruby implementatio...
How do I find numeric columns in Pandas?
... exclude. So isNumeric would look like:
numerics = ['int16', 'int32', 'int64', 'float16', 'float32', 'float64']
newdf = df.select_dtypes(include=numerics)
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How can I confirm a database is Oracle & what version it is using SQL?
...---------------------------------
Oracle Database 10g Release 10.2.0.3.0 - 64bit Production
PL/SQL Release 10.2.0.3.0 - Production
CORE 10.2.0.3.0 Production
TNS for Solaris: Version 10.2.0.3.0 - Production
NLSRTL Version 10.2.0.3.0 - Production
...