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Error: free(): invalid next size (fast):
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We need the code, but that usually pops up when you try to free() memory from a pointer that is not allocated. This often happens when you're double-freeing.
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Different floating point result with optimization enabled - compiler bug?
...wide. Different optimization levels affect how often floating point values from CPU get saved into memory and thus rounded from 80-bit precision to 64-bit precision.
Use the -ffloat-store gcc option to get the same floating point results with different optimization levels.
Alternatively, use the l...
When is it better to use String.Format vs string concatenation?
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My initial preference (coming from a C++ background) was for String.Format. I dropped this later on due to the following reasons:
String concatenation is arguably "safer". It happened to me (and I've seen it happen to several other developers) to remove...
How to get “wc -l” to print just the number of lines without file name?
... @rao There is no space with bash. Where does the space come from in ksh? wc -l should not emit one, and why would ksh prepend the standard output of a program with a space?
– Peter - Reinstate Monica
Jul 12 '17 at 12:53
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How do you test to see if a double is equal to NaN?
... (double getting converted to Double by the compiler/runtime); new feature from 1.5 onwards. Little risk going this direction; going from Double to double creates risk of NullPointerExceptions.
– M1EK
Sep 21 '09 at 21:01
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How do I detect the Python version at runtime? [duplicate]
...very detailed but machine parsable would be to get the version_info object from platform.sys, instead, and then use its properties to take a predetermined course of action. For example:
import platform;
print(platform.sys.version_info)
Output on my system:
sys.version_info(major=3, minor=6, mic...
理解Python的 with 语句 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...his is the situation where you want to gain a handler to a file, read data from the file and the close the file handler.
有一些任务，可能事先需要设置，事后做清理工作。对于这种场景，Python的with语句提供了一种非常方便的处理方式。一个很好的例子是...
How to use a RELATIVE path with AuthUserFile in htaccess?
...unes the deployed files to their environment. This decouples your codebase from the specifics of its target environment (i. e. its environment variables and configuration parameters). In general, the application should adapt to the environment, if you do it the other way around, you might run into p...
How to unzip a file using the command line? [closed]
...rigger the native unzip functionality in Windows. Then pipe out the script from within your batch file and then call it. Then it's as good as stand alone. I've done it in the past for numerous tasks. This way it does not require need of third party applications, just the one batch file that does eve...
Format bytes to kilobytes, megabytes, gigabytes
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return round($bytes, $precision) . ' ' . $units[$pow];
}
(Taken from php.net, there are many other examples there, but I like this one best :-)
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