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When do you use map vs flatMap in RxJava?
When do you use map vs flatMap in RxJava ?
10 Answers
10
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#ifdef replacement in the Swift language
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Yes you can do it.
In Swift you can still use the "#if/#else/#endif" preprocessor macros (although more constrained), as per Apple docs. Here's an example:
#if DEBUG
let a = 2
#else
let a = 3
#endif
Now, you must set the "DEB...
Do C# Timers elapse on a separate thread?
Does a System.Timers.Timer elapse on a separate thread than the thread that created it?
5 Answers
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JavaScript: Overriding alert()
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It's definitely "supported". It is your web page, you do whatever you want to with it.
I already did this to track analytics events without modifying a library but by sneaking into events.
Use the proxy pattern:
(function(proxied) {
window.alert = function() {
// do som...
Difference between SurfaceView and View?
... simple. Check pierr's answer; it has a link to the detailed architecture doc (source.android.com/devices/graphics/architecture.html), and explains why hardware acceleration of Canvas rendering can make custom Views a better choice.
– fadden
Dec 1 '14 at 17:09...
git rebase: “error: cannot stat 'file': Permission denied”
...base to squash the two commits together before pushing them. (I've never done this before.)
33 Answers
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Why does this loop produce “warning: iteration 3u invokes undefined behavior” and output more than 4
...ndefined behaviour. And this means anything can happen, and discussing why does it happen under the rules of C++ doesn't make sense.
C++11 draft N3337: §5.4:1
If during the evaluation of an expression, the result is not mathematically defined or not in the range of
representable values for ...
How do I see all foreign keys to a table or column?
In MySQL, how do I get a list of all foreign key constraints pointing to a particular table? a particular column? This is the same thing as this Oracle question , but for MySQL.
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Is it possible to stop JavaScript execution? [duplicate]
...omething went badly wrong!");
If you want to know more, keep reading.
Do you want to stop JavaScript's execution for developing/debugging?
The expression debugger; in your code, will halt the page execution, and then your browser's developer tools will allow you to review the state of your pag...
filter items in a python dictionary where keys contain a specific string
I'm a C coder developing something in python. I know how to do the following in C (and hence in C-like logic applied to python), but I'm wondering what the 'Python' way of doing it is.
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