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bpftrace教程【官方】 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
bpftrace教程【官方】bpftrace_tutorial该教程通过12个简单小节帮助你了解bpftrace的使用。每一小节都是一行的命令，你可以立马运行并看到运行效果。该教程系列用来介绍bpftrace的概念。关于bpftrace的完整参考，见bpftr 该教程通过12...
How to use Boost in Visual Studio 2010
...boost (1.47.0 as of writing) into a directory of your choice (e.g. C:\boost_1_47_0).
Create a new empty project in Visual Studio.
Open the Property Manager and expand one of the configuration for the platform of your choice.
Select & right click Microsoft.Cpp.<Platform>.user, and select Pr...
Should __init__() call the parent class's __init__()?
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In Python, calling the super-class' __init__ is optional. If you call it, it is then also optional whether to use the super identifier, or whether to explicitly name the super class:
object.__init__(self)
In case of object, calling the super method is not st...
Referring to the null object in Python
...t;> NoneType = type(None)
>>> id(None)
10748000
>>> my_none = NoneType()
>>> id(my_none)
10748000
>>> another_none = NoneType()
>>> id(another_none)
10748000
>>> def function_that_does_nothing(): pass
>>> return_value = function_that_...
Assign a variable inside a Block to a variable outside a Block
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You need to use this line of code to resolve your problem:
__block Person *aPerson = nil;
For more details, please refer to this tutorial: Blocks and Variables
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python: Change the scripts working directory to the script's own directory
..., you can use the os.path functions:
import os
abspath = os.path.abspath(__file__)
dname = os.path.dirname(abspath)
os.chdir(dname)
This takes the filename of your script, converts it to an absolute path, then extracts the directory of that path, then changes into that directory.
...
django urls without a trailing slash do not redirect
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check your APPEND_SLASH setting in the settings.py file
more info in the django docs
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What are the correct version numbers for C#?
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VERSION_____LANGUAGE SPECIFICATION______MICROSOFT COMPILER
C# 1.0/1.2____December 2001?/2003?___________January 2002?
C# 2.0_______September 2005________________November 2005?
C# 3.0_______May 2006_____________________November 20...
How to use __doPostBack()
I'm trying to create an asyncrhonous postback in ASP.NET using __doPostBack() , but I have no idea how to do it. I want to use vanilla JavaScript.
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What are the differences between json and simplejson Python modules?
...plejson
from timeit import repeat
NUMBER = 100000
REPEAT = 10
def compare_json_and_simplejson(data):
"""Compare json and simplejson - dumps and loads"""
compare_json_and_simplejson.data = data
compare_json_and_simplejson.dump = json.dumps(data)
assert json.dumps(data) == simplejson...