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What does addChildViewController actually do?

I'm just dipping my feet for the first time into iOS development, and one of the first things I've had to do is implement a custom container view controller - lets call it SideBarViewController - that swaps out which of several possible child view controllers it shows, almost exactly like a stan...
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Why is whitespace sometimes needed around metacharacters?

A few months ago I tattooed a fork bomb on my arm, and I skipped the whitespaces, because I think it looks nicer without them. But to my dismay, sometimes (not always) when I run it in a shell it doesn't start a fork bomb, but it just gives a syntax error. ...
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When do you need to explicitly call a superclass constructor?

...Well there's a difference between requiring the constructor to be present, and requiring an explicit delegation to the parameterless super-constructor. The latter is a matter of style - whether you prefer to be explicit/obvious or brief. – Jon Skeet Dec 11 '17 ...
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How does the C# compiler detect COM types?

... +1 for being awesome by writing the accepted answer when Eric Lippert and Jon Skeet also answered ;) No, really, +1 for mentioning CoClass. – OregonGhost Jul 10 '09 at 16:16 ...
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What is pluginManagement in Maven's pom.xml?

... The difference between <pluginManagement/> and <plugins/> is that a <plugin/> under: <pluginManagement/> defines the settings for plugins that will be inherited by modules in your build. This is great for cases where you have a parent pom file. &lt...
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What is a git topic branch?

... Topic branches are typically lightweight branches that you create locally and that have a name that is meaningful for you. They are where you might do work for a bug fix or feature (they're also called feature branches) that is expected to take some time to complete. Another type of branch is the ...
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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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Fastest way to remove first char in a String

...foo" instead of "//foo". The first option needs a bit more work to understand than the third - I would view the Substring option as the most common and readable. (Obviously each of them as an individual statement won't do anything useful - you'll need to assign the result to a variable, possibly d...
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How to set child process' environment variable in Makefile

... I have GNU make 3.81, and all: <\n\t>export PROJ_ROOT=$(CURDIR)<\n\t>echo $(PROJ_ROOT)<\n> outputs the correct expansion for the first row, but only echo for the second one. PROJ_ROOT is not set after running make. Spaces around ...
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How do I remove a project configuration in Visual Studio 2008?

...t to remove. In the dialog that pops up, mark each unwanted configuration and select "Remove". share | improve this answer | follow | ...