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What is a “callback” in C and how are they implemented?
From the reading that I have done, Core Audio relies heavily on callbacks (and C++, but that's another story).
9 Answers
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How to get different colored lines for different plots in a single figure?
... x)
plt.plot(x, 3 * x)
plt.plot(x, 4 * x)
plt.show()
And, as you may already know, you can easily add a legend:
import matplotlib.pyplot as plt
import numpy as np
x = np.arange(10)
plt.plot(x, x)
plt.plot(x, 2 * x)
plt.plot(x, 3 * x)
plt.plot(x, 4 * x)
plt.legend(['y = x', 'y = 2x', 'y = 3x'...
What are the differences between a pointer variable and a reference variable in C++?
I know references are syntactic sugar, so code is easier to read and write.
41 Answers
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How to write very long string that conforms with PEP8 and prevent E501
...ng of your example.
Personally I don't like the backslashes, and I recall reading somewhere that its use is actually deprecated in favor of this form which is more explicit. Remember "Explicit is better than implicit."
I consider the backslash to be less clear and less useful because this is actua...
Delegates in swift?
... you don't want to do yourself.
I wrote a little story to illustrate this. Read it in a Playground if you like.
Once upon a time...
// MARK: Background to the story
// A protocol is like a list of rules that need to be followed.
protocol OlderSiblingDelegate: class {
// The following command (i...
GridCtrl 控件FAQ - C/C++ - 清泛网 - 专注C/C++及内核技术
...只读
CGridCtrlObject.SetItemState(1,1, m_Grid.GetItemState(1,1) | GVIS_READONLY);
将单元格（1，1）设为正常
CGridCtrlObject.SetItemState(1,1, m_Grid.GetItemState(1,1) & ~GVIS_READONLY);
单元格可用的状态常量
&nnbsp; GVIS_FOCUSED // Cell has focus
...
How to import data from mongodb to pandas?
... else:
conn = MongoClient(host, port)
return conn[db]
def read_mongo(db, collection, query={}, host='localhost', port=27017, username=None, password=None, no_id=True):
""" Read from Mongo and Store into DataFrame """
# Connect to MongoDB
db = _connect_mongo(host=host, p...
Does “display:none” prevent an image from loading?
...e it's not useful.
The image has a display:none style but its size may be read by the script.
Chrome v68.0 does not load images if the parent is hidden.
You may check it there : http://jsfiddle.net/tnk3j08s/
You could also have checked it by looking at the "network" tab of your browser's develop...
How can I get a user's media from Instagram without authenticating as a user?
...ng. Why would they force an access token just to display images that are already public? I'm hardly trying to rinse them for every user in the world, I just want to display a client's latest insta without having to spend hours messing with it. Gah!
– Matt Fletcher
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What is a patch in git version control?
...commit your changes, or even let you apply some patch file that you have already. Without going deep into details, in this sense git is absolutely the same as other version control systems like SVN, or even CVS or perforce.
Hope it helps!
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