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When do you use map vs flatMap in RxJava?
...r Exception problem, just throw it with a Non checked exception : RX will call the onError handler for you.
Observable.from(jsonFile).map(new Func1<File, String>() {
@Override public String call(File file) {
try {
return new Gson().toJson(new FileReader(file), Object.c...
Import module from subfolder
...For example like this PYTHONPATH=.:.. (for *nix family).
Also you can manually add your current directory (src in your case) to pythonpath:
import os
import sys
sys.path.insert(0, os.getcwd())
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Decimal separator comma (',') with numberDecimal inputType in EditText
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This will allow duplicate decimal separators. See answer below to handle it: stackoverflow.com/a/45384821/6138589
– Esdras Lopez
Feb 6 '19 at 1:50
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twig: IF with multiple conditions
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If I recall correctly Twig doesn't support || and && operators, but requires or and and to be used respectively. I'd also use parentheses to denote the two statements more clearly although this isn't technically a requirement...
Learning to write a compiler [closed]
... The PDF ¶ version (examples are in Pascal, but the information is generally applicable)
Linkers and Loaders $ (Google Books)
Lisp in Small Pieces (LiSP) $
LLVM Tutorial
Modern Compiler Implementation in ML $ — There is a Java $ and C $ version as well - widely considered a very good book
Object-...
What are Unwind segues for and how do you use them?
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In a Nutshell
An unwind segue (sometimes called exit segue) can be used to navigate back through push, modal or popover segues (as if you popped the navigation item from the navigation bar, closed the popover or dismissed the modally presented view controller). On to...
How to produce a range with step n in bash? (generate a sequence of numbers with increments)
...course seq 0 2 10 will produce the same output on its own).
Note that seq allows floating-point numbers (e.g., seq .5 .25 3.5) but bash's brace expansion only allows integers.
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design a stack such that getMinimum( ) should be O(1)
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EDIT: This fails the "constant space" constraint - it basically doubles the space required. I very much doubt that there's a solution which doesn't do that though, without wrecking the runtime complexity somewhere (e.g. making push/pop O(n)). Note that this doesn't change the complex...
Is the creation of Java class files deterministic?
...nces? Is a difference only possibly in theory or does Oracle's javac actually produce different class files for the same input and compiler options?
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Is Meyers' implementation of the Singleton pattern thread safe?
...rently while the variable is being initialized, the concurrent execution shall wait for completion of the initialization.
GCC and VS support for the feature (Dynamic Initialization and Destruction with Concurrency, also known as Magic Statics on MSDN) is as follows:
Visual Studio: supported sinc...