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How should I unit test threaded code?
...hat is inherently multithreaded. Events come in from the operating system and I have to process them concurrently.
The simplest way to deal with testing complex, multithreaded application code is this: If its too complex to test, you're doing it wrong. If you have a single instance that has mu...
Encoding Javascript Object to Json string
I want to encode a Javascript object into a JSON string and I am having considerable difficulties.
2 Answers
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List all the files that ever existed in a Git repository
...eaching me a bit more in the comments, this version has a shorter pipeline and gives git more opportunity to get things right.
git log --pretty=format: --name-only --diff-filter=A | sort -u
share
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Pick a random value from an enum?
...esult of values() because each call copies an array. Also, don't create a Random every time. Keep one. Other than that what you're doing is fine. So:
public enum Letter {
A,
B,
C,
//...
private static final List<Letter> VALUES =
Collections.unmodifiableList(Arrays.asList(values...
How to use enums in C++
...== Days.Saturday)
Because Days is not a scope, nor object. It is a type. And Types themselves don't have members. What you wrote is the equivalent to std::string.clear. std::string is a type, so you can't use . on it. You use . on an instance of a class.
Unfortunately, enums are magical and so ...
Create a dictionary on a list with grouping
...
Just to make mquander's suggestion concrete:
var groupedDemoClasses = mySpecialVariableWhichIsAListOfDemoClass
.GroupBy(x => x.GroupKey)
.ToDictionary(gdc => gdc.Key, gdc =>...
Useful example of a shutdown hook in Java?
...ying to make sure my Java application takes reasonable steps to be robust, and part of that involves shutting down gracefully. I am reading about shutdown hooks and I don't actually get how to make use of them in practice.
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Why is lazy evaluation useful?
... You can actually emulate an infinite list in Python using generators and generator expressions (which work in a similar way to a list comprehension): python.org/doc/2.5.2/ref/genexpr.html
– John Montgomery
Nov 5 '08 at 15:11
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How do you rename a MongoDB database?
There's a typo in my MongoDB database name and I'm looking to rename the database.
10 Answers
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how to deal with google map inside of a hidden div (Updated picture)
i have a page and a google map is inside a hidden div at first. I then show the div after i click a link but only the top left of the map shows up.
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