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How do I install an R package from source?
...re in ‘/private/var/folders/Ey/EyzhYjoKESmsmsZ6K87PeU+++TI/-Tmp-/Rtmpe3C96p/downloaded_packages’ Updating HTML index of packages in '.Library' Warning message: In install.packages("RJSONIO", repos = "omegahat.org/R", : installation of package 'RJSONIO' had non-zero exit status
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Failed to load the JNI shared Library (JDK)
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You need a 64-bit trio:
64-bit OS
64-bit Java
64-bit Eclipse
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How can I convert an image into a Base64 string?
What is the code to transform an image (maximum of 200 KB) into a Base64 String?
14 Answers
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The term 'Update-Database' is not recognized as the name of a cmdlet
...lServer and EF.SqlServer.Design installed.
– Janneman96
Jan 23 at 9:16
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Can I get Memcached running on a Windows (x64) 64bit environment?
...yone know IF , WHEN or HOW I can get Memcached running on a Windows 64bit environment?
13 Answers
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Find integer index of rows with NaN in pandas dataframe
...3058 0.156073
2 -0.871179 -0.118575
3 0.594188 NaN
4 -1.017903 -0.484744
5 0.860375 0.239265
6 -0.640070 NaN
7 -0.535802 1.632932
8 0.876523 -0.153634
9 -0.686914 0.131185
In [10]: pd.isnull(df).any(1).nonzero()[0]
Out[10]: array([3, 6])
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Validating parameters to a Bash script
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lhunathlhunath
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What is the difference between range and xrange functions in Python 2.X?
... too large to convert to C long
range(2**32-1, 2**32+1) # OK --> [4294967295L, 4294967296L]
Note that in Python 3.0 there is only range and it behaves like the 2.x xrange but without the limitations on minimum and maximum end points.
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Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviations with _mm_popcnt_
... a very weird effect: Changing the loop variable from unsigned to uint64_t made the performance drop by 50% on my PC.
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Base64 encoding in SQL Server 2005 T-SQL
I'd like to write a T-SQL query where I encode a string as a Base64 string. Surprisingly, I can't find any native T-SQL functions for doing Base64 encoding. Does a native function exist? If not, what's the best way to do Base64 encoding in T-SQL?
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