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How to keep a Python script output window open?
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Just fyi for the python os.system command you would do os.system( "cmd /k " + myAppPath + " " + myFlagsString )
– Jay
Dec 6 '11 at 8:01
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Is there a difference between “==” and “is”?
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is will return True if two variables point to the same object, == if the objects referred to by the variables are equal.
>>> a = [1, 2, 3]
>>> b = a
>>> b is a
True
>>> b == a
True
# Make a new copy of list `a` via the slice ...
Oracle find a constraint
I have a constraint called users.SYS_C00381400 . How do I find what that constraint is? Is there a way to query all constraints?
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Google breakpad stackwalker无法加载符号 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...ython 脚本 gen_symbols.py 自动生成：
#!/usr/bin/python
import sys
import getopt
import os
import errno
from os.path import basename
def make_sure_path_exists(path):
try:
os.makedirs(path)
except OSError as exception:
if exception.errno != errno.EEXIST:...
Number of processors/cores in command line
...X, you can do:
CORES=$(grep -c ^processor /proc/cpuinfo 2>/dev/null || sysctl -n hw.ncpu)
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convert double to int
What is the best way to convert a double to an int ? Should a cast be used?
10 Answers
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In Python, how can you load YAML mappings as OrderedDicts?
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The yaml module allow you to specify custom 'representers' to convert Python objects to text and 'constructors' to reverse the process.
_mapping_tag = yaml.resolver.BaseResolver.DEFAULT_MAPPING_TAG
def dict_representer(dumper, data):
return dumper.represent_dict(data.iteritems())
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How to convert numbers between hexadecimal and decimal
How do you convert between hexadecimal numbers and decimal numbers in C#?
17 Answers
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Split string, convert ToList() in one line
...ut the need of Linq:
List<int> numbers = new List<int>( Array.ConvertAll(sNumbers.Split(','), int.Parse) );
// Uses Linq
var numbers = Array.ConvertAll(sNumbers.Split(','), int.Parse).ToList();
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How to convert from System.Enum to base integer?
I'd like to create a generic method for converting any System.Enum derived type to its corresponding integer value, without casting and preferably without parsing a string.
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