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Is errno thread-safe?
...vice that can access the
per-thread error number as follows
(ISO/IEC 9945:1-1996, §2.4):
Some functions may provide the error number in a variable accessed
through the symbol errno. The symbol
errno is defined by including the
header , as specified by the
C Standard ... For each th...
What does “zend_mm_heap corrupted” mean
... nhahtdh
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answered Dec 15 '10 at 19:16
dsmithersdsmithers
62666 silv...
unbound method f() must be called with fibo_ instance as first argument (got classobj instance inste
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answered Nov 6 '14 at 21:04
Eric LeschinskiEric Leschinski
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...
Delete all local git branches
...
419
The 'git branch -d' subcommand can delete more than one branch. So, simplifying @sblom's answ...
How to loop through an array containing objects and access their properties
...
Lawrence Cherone
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answered May 18 '13 at 16:52
Dory ZidonDory Zidon
...
Pandas - Get first row value of a given column
...me 1.2
C 12.0
D 25.0
E 12.0
Name: 0, dtype: float64
To select the ith value in the Btime column you could use:
In [30]: df_test['Btime'].iloc[0]
Out[30]: 1.2
There is a difference between df_test['Btime'].iloc[0] (recommended) and df_test.iloc[0]['Btime']:
DataFrames...
T-SQL Cast versus Convert
...
344
CONVERT is SQL Server specific, CAST is ANSI.
CONVERT is more flexible in that you can format ...
“This project is incompatible with the current version of Visual Studio”
...n of Visual Studio
is due to an attempt to open a project targeting .Net 4.5, then the "solution" or workaround is to edit the .csproj file and change the TargetFrameworkVersion from "v4.5" to "v4.0". That at least allows the project to be loaded, although it may result in compiler errors if the p...
Why is unsigned integer overflow defined behavior but signed integer overflow isn't?
...
Pascal CuoqPascal Cuoq
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...
How to count the number of set bits in a 32-bit integer?
...33333) + ((i >> 2) & 0x33333333);
return (((i + (i >> 4)) & 0x0F0F0F0F) * 0x01010101) >> 24;
}
For JavaScript: coerce to integer with |0 for performance: change the first line to i = (i|0) - ((i >> 1) & 0x55555555);
This has the best worst-case behaviour of ...