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What is the “-->” operator in C++?
...rised that the following snippet compiled and worked in both Visual Studio 2008 and G++ 4.4.
25 Answers
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Convert string to Python class object?
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120
Warning: eval() can be used to execute arbitrary Python code. You should never use eval() wi...
How do I create a directory from within Emacs?
...ET dir/to/create RET
to create directories dir/parent1/node and dir/parent2/node, type:
M-! mkdir -p dir/parent{1,2}/node RET
It assumes that Emacs's inferior shell is bash/zsh or other compatible shell.
or in a Dired mode
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It doesn't create nonexistent parent directories.
Example:
C-x d ...
Is the “struct hack” technically undefined behavior?
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52
As the C FAQ says:
It's not clear if it's legal or portable, but it is rather popular.
and...
What is event bubbling and capturing?
... bubbling. Both are part of the W3C Document Object Model Events standard (2000).
IE < 9 uses only event bubbling, whereas IE9+ and all major browsers support both. On the other hand, the performance of event bubbling may be slightly lower for complex DOMs.
We can use the addEventListener(type,...
How to get whole and decimal part of a number?
Given, say, 1.25 - how do I get "1" and ."25" parts of this number?
16 Answers
16
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Extracting specific columns in numpy array
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277
I assume you wanted columns 1 and 9?
To select multiple columns at once, use
X = data[:, [1, 9...
Access to Modified Closure (2)
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edited Dec 21 '12 at 11:05
answered Nov 20 '08 at 5:13
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How to access accelerometer/gyroscope data from Javascript?
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The way to do this in 2019+ is to use DeviceOrientation API. This works in most modern browsers on desktop and mobile.
window.addEventListener("deviceorientation", handleOrientation, true);
After registering your event listener (in this ca...
What's the best way to share data between activities?
...etIntent().getExtras();
int value = bundle.getInt("some_key");
String value2 = bundle.getString("some_other_key");
Use this method if you are passing primitive data or Strings. You can also pass objects that implements Serializable.
Although tempting, you should think twice before using Serializa...