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How can I declare and use Boolean variables in a shell script?

.... Footnotes Miku's answer has since been edited and no longer contains (known) flaws. Not an exhaustive list. A valid command in this context means a command that exists. It doesn't matter if the command is used correctly or incorrectly. E.g. man woman would still be considered a valid command, ev...
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Git: cannot checkout branch - error: pathspec '…' did not match any file(s) known to git

...ave found & upvoted this answer (which is completely trivial and well-known to any git user with more than two days experience) doesn't mean the OP should accept it. – Michael Johnston Jun 15 '16 at 19:11 ...
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Is there a way to automate the android sdk installation?

Now I have to download and install the Android SDK and AVD Manager, and then install the APIs, tools through the UI. Is there a way to automate this process? ...
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What is java interface equivalent in Ruby?

...ple: where in java.util.Set<E> does it actually say that it is, you know, a set? Nowhere! Or more precisely, in the documentation. In English. In pretty much all cases of interfaces, both from Java and .NET, all the relevant information is actually in the docs, not in the types. So, if the typ...
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Android activity life cycle - what are all these methods for?

...ties are considered active or running if they are in the foreground, also known as the top of the activity stack. This is considered the highest priority activity in the Android Activity stack, and as such will only be killed by the OS in extreme situations, such as if the activity tries to use more...
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Safe (bounds-checked) array lookup in Swift, through optional bindings?

...hen accessing missing keys, which makes sense because it's much harder to know if a key is present in a dictionary since those keys can be anything, where in an array the key must in a range of: 0 to count. And it's incredibly common to iterate over this range, where you can be absolutely sure have ...
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Custom Adapter for List View

... I know this has already been answered... but I wanted to give a more complete example. In my example, the ListActivity that will display our custom ListView is called OptionsActivity, because in my project this Activity is goin...
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getApplication() vs. getApplicationContext()

...text.getApplicationContext() when first constructing the singleton. I know this is not an exact and precise answer, but still, does that answer your question? share | improve this answer ...
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How many concurrent requests does a single Flask process receive?

I'm building an app with Flask, but I don't know much about WSGI and it's HTTP base, Werkzeug. When I start serving a Flask application with gunicorn and 4 worker processes, does this mean that I can handle 4 concurrent requests? ...
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Pod install is staying on “Setting up CocoaPods Master repo”

...e) For me the above step took quite a long time as the repo (Dec 2016) is now 1.1 GB share | improve this answer | follow | ...