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What is a singleton in C#?
...plementing the Singleton Pattern in C#" covering most of what you need to know - including some good advice regarding thread safety.
To be honest, It's very rare that you need to implement a singleton - in my opinion it should be one of those things you should be aware of, even if it's not used too...
How to check if a variable is set in Bash?
How do I know if a variable is set in Bash?
33 Answers
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Javascript reduce() on Object
... That's Array.prototype.values() that you linked to - edited now
– Jonathan Wood
Sep 19 '17 at 14:11
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How to link C++ program with Boost using CMake
...r the add_executable and find_package lines, so all linked components are known.
– Murphy
Dec 21 '16 at 12:36
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How to resize a tableHeaderView of a UITableView?
...y. The problem is, my subview changes size over a second as an animation. Now I'm trying to figure out how to animate the tableHeaderView with it.
– Andrew
Jan 18 '10 at 7:56
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How do I limit the number of returned items?
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Thanks a lot, didn't know you could make queries like that. Where can I find some form of documentation about this execFind method ?
– Running Turtle
Apr 29 '11 at 14:18
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Difference between Property and Field in C# 3.0+
...if we leave out issues with multiple threads). A property such as DateTime.Now is not always equal to itself.
Properties may throw exceptions - fields will never do that.
Properties may have side effects or take a really long time to execute. Fields have no side effects and will always be as fast as...
What's Up with Logging in Java? [closed]
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In chronological order of api apperance (as far as I know):
Log4j because most everybody uses it (in my experience)
Commons Logging because open source projects use it (so they can integrate with whatever logging framework is used in the integrated solution); especially valid ...
How do I import a Swift file from another Swift file?
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UPDATE Swift 2.x, 3.x, 4.x and 5.x
Now you don't need to add the public to the methods to test then.
On newer versions of Swift it's only necessary to add the @testable keyword.
PrimeNumberModelTests.swift
import XCTest
@testable import MyProject
class Prim...
Change an HTML5 input's placeholder color with CSS
...ment.
CSS selectors
User agents are required to ignore a rule with an unknown selector. See Selectors Level 3:
a group of selectors containing an invalid selector is invalid.
So we need separate rules for each browser. Otherwise the whole group would be ignored by all browsers.
::-webkit...