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In Java, what does NaN mean?
...ce
some undefined result. For example,
0.0 divided by 0.0 is arithmetically undefined. Taking the square root of a
negative number is also undefined.
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Change multiple files
...ot even just a builtin. For sed -i 's/old/new' *, the expansion of * must ALL be passed as an arglist to sed, and I'm fairly sure this has to happen before the sed process can even be started. Using the for loop, the full arglist (the expansion of *) never gets passed as a command, only stored in ...
How do I get the day of week given a date?
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Calendar math generally sucks because computers don't know what PTO is. In an effort to avoid teaching them I highly recommend obfuscating functions which determine whether it is currently a holiday or weekend.
– meawoppl...
Hidden features of WPF and XAML?
... trick to debug what is going on with bindings in any particular scenario. All you have to do is to reference System.Diagnostics namespace in WindowsBase assembly
xmlns:sd="clr-namespace:System.Diagnostics;assembly=WindowsBase"
and then add following to the binding expression:
<TextBlock Tex...
Android: ScrollView force to bottom
I would like a ScrollView to start all the way at the bottom. Any methods?
16 Answers
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What does $$ mean in the shell?
... This does produce a number that varies from time to time... but if you call it repeatedly, it returns the same number. (The solution is to just use the time.)
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Understanding checked vs unchecked exceptions in Java
.... these that you should explicitly catch or rethrow) should not be used at all. They were eliminated in C# for example, and most languages don't have them. So you can always throw a subclass of RuntimeException (unchecked exception)
However, I think checked exceptions are useful - they are used whe...
How do I iterate over a range of numbers defined by variables in Bash?
...echo $i; done
edit: I prefer seq over the other methods because I can actually remember it ;)
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Why can't a text column have a default value in MySQL?
...hat frustrating, as I want a default value!). Anybody know why this is not allowed?
7 Answers
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zsh compinit: insecure directories
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This is definitely the best solution for me. I installed zsh and zsh-completions with Homebrew, so obviously did not want to change it to be owned by root.
– katy lavallee
Oct 18 '16 at 18:10
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