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Defining and using a variable in batch file

I'm trying to define and use a variable in a batch file. It looks like it should be simple: 3 Answers ...
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Best way to make Django's login_required the default

...und matching URL patterns. To use, add the class to MIDDLEWARE_CLASSES and define LOGIN_REQUIRED_URLS and LOGIN_REQUIRED_URLS_EXCEPTIONS in your settings.py. For example: ------ LOGIN_REQUIRED_URLS = ( r'/topsecret/(.*)$', ) LOGIN_REQUIRED_URLS_EXCEPTIONS = ( ...
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What is the difference between user and kernel modes in operating systems?

What are the differences between User Mode and Kernel Mode, why and how do you activate either of them, and what are their use cases? ...
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Conceptually, how does replay work in a game?

...rame number at which it was received) along with the initial seeds of any random number generators. To replay the game, you reset your PRNGs using the saved seeds and feed the game engine the same sequence of input (synchronized to the frame numbers). Since many games will update the game state ba...
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What does the git index contain EXACTLY?

What does the Git index exactly contain, and what command can I use to view the content of the index? 5 Answers ...
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AngularJS : Where to use promises?

...to be a complete answer to your question, but hopefully this will help you and others when you try to read the documentation on the $q service. It took me a while to understand it. Let's set aside AngularJS for a moment and just consider the Facebook API calls. Both the API calls use a callback m...
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How to do a scatter plot with empty circles in Python?

... following: import matplotlib.pyplot as plt import numpy as np x = np.random.randn(60) y = np.random.randn(60) plt.scatter(x, y, s=80, facecolors='none', edgecolors='r') plt.show() Note: For other types of plots see this post on the use of markeredgecolor and markerfacecolor. ...
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Is there a NumPy function to return the first index of something in an array?

... Yes, here is the answer given a NumPy array, array, and a value, item, to search for: itemindex = numpy.where(array==item) The result is a tuple with first all the row indices, then all the column indices. For example, if an array is two dimensions and it contained your it...
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How can I do division with variables in a Linux shell?

When I run commands in my shell as below, it returns an expr: non-integer argument error. Can someone please explain this to me? ...
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What is the difference between null and undefined in JavaScript?

I want to know what the difference is between null and undefined in JavaScript. 33 Answers ...