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Deleting folders in python recursively
... delete a file, if it is read only. therefore, one can use -
import os, sys
import stat
def del_evenReadonly(action, name, exc):
os.chmod(name, stat.S_IWRITE)
os.remove(name)
if os.path.exists("test/qt_env"):
shutil.rmtree('test/qt_env',onerror=del_evenReadonly)
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What does !! mean in ruby?
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Not not. It's used to convert a value to a boolean:
!!nil #=> false
!!"abc" #=> true
!!false #=> false
It's usually not necessary to use though since the only false values to Ruby are nil and false, so it's usually best to let that c...
How to find current transaction level?
...alizable'
WHEN 5 THEN 'Snapshot' END AS TRANSACTION_ISOLATION_LEVEL
FROM sys.dm_exec_sessions
where session_id = @@SPID
docs.microsoft.com reference for the constant values.
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Sort a Custom Class List
...}
Only thing you'd have to do when creating the instance of the class to convert your string containing the date into DateTime type, but it can be done easily e.g. by DateTime.Parse(String) method.
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What's the best way to check if a file exists in C?
...y test for write permission, since the access function does not take DACLs into account. access( fname, W_OK ) may return 0 (success) because the file does not have the read-only attribute set, but you still may not have permission to write to the file.
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Difference between byte vs Byte data types in C# [duplicate]
...yte"); //doesn't work, I can see no way to use"byte" directly here without converting it to "Byte"
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Convert an image (selected by path) to base64 string
How do you convert an image from a path on the user's computer to a base64 string in C#?
12 Answers
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How do I drop table variables in SQL-Server? Should I even do this?
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@JNKs point about them being unaffected by transactions is important, you can use table variables to hold data and write to a log table after an error causes a rollback.
– HLGEM
Apr 13 '11 at 18...
Passing variable arguments to another function that accepts a variable argument list
...hat takes a variable argument list with , ... in the signature. If you've converted the variable arguments to a va_list, you can pass the va_list to another function that only takes a va_list, but that function (or one that it calls) must have some way of knowing what's in the va_list.
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“#include” a text file in a C program as a char[]
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You have two possibilities:
Make use of compiler/linker extensions to convert a file into a binary file, with proper symbols pointing to the begin and end of the binary data. See this answer: Include binary file with GNU ld linker script.
Convert your file into a sequence of character constants...