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How does the “this” keyword work?
...s set to the global object, window (§10.4.1.1).
2. Entering eval code
…by a direct call to eval()
ThisBinding is left unchanged; it is the same value as the ThisBinding of the calling execution context (§10.4.2 (2)(a)).
…if not by a direct call to eval()
ThisBinding is set to the global obje...
What do querySelectorAll and getElementsBy* methods return?
Do getElementsByClassName (and similar functions like getElementsByTagName and querySelectorAll ) work the same as getElementById or do they return an array of elements?
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What makes JNI calls slow?
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First, it's worth noting that by "slow," we're talking about something that can take tens of nanoseconds. For trivial native methods, in 2010 I measured calls at an average 40 ns on my Windows desktop, and 11 ns on my Mac desktop. Unless you're making man...
What is Type-safe?
...s you up to a lot of errors that can be easily missed, and only identified by testing the running program. Personally, I prefer to have my compiler tell me if I made that mistake.
Now, back to C#...
C# supports a language feature called covariance, this basically means that you can substitute a ba...
Detect application heap size in Android
...mory:" + Long.toString(maxMemory));
This method tells you how many total bytes of heap your app is allowed to use.
For item 2 above: getMemoryClass()
which can be invoked as follows:
ActivityManager am = (ActivityManager) getSystemService(ACTIVITY_SERVICE);
int memoryClass = am.getMemoryClass()...
Raise warning in Python without interrupting program
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You shouldn't raise the warning, you should be using warnings module. By raising it you're generating error, rather than warning.
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TDD vs. Unit testing [closed]
...TDD, but they weren't creating any Unit Tests before...then start them off by creating Unit Tests after their code is written. Even Unit tests written after the code are better than no Unit Tests at all!
Once they're proficient at Unit Testing (and everything that comes with it), then you can work ...
Add x and y labels to a pandas plot
... colormap='jet', marker='.', markersize=10, title='Video streaming dropout by category')
ax.set_xlabel("x label")
ax.set_ylabel("y label")
Or, more succinctly: ax.set(xlabel="x label", ylabel="y label").
Alternatively, the index x-axis label is automatically set to the Index name, if it has one...
Programmatically fire button click event?
... calling the method, how to fire button click event programmatically, not by when user click it manually. I created a UIButton programmatically in an UIView, i want to fire button click event automatically after a certain time interval via program itself, not by the user.
– Ge...
What are Vertex Array Objects?
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"Vertex Array Object" is brought to you by the OpenGL ARB Subcommittee for Silly Names.
Think of it as a geometry object. (As an old time SGI Performer programmer, I call them geosets.) The instance variables/members of the object are your vertex pointer, normal p...