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How is pattern matching in Scala implemented at the bytecode level?
...but see below about custom extractors
case "hello" // equality check
case _ : Foo // instance of check
case x => // assignment to a fresh variable
case _ => // do nothing, this is the tail else on the if/else
There's much more that you can do with patterns like or patterns and combinations ...
When do you use Java's @Override annotation and why?
... context) {
return true;
}
This change will not cause any compile time errors or warnings - but it completely changes the intended behavior of the subclass.
To answer your question: you should use the @Override annotation if the lack of a method with the same signature in a superclass is indic...
How to grep and replace
...
Why do I get "sed: RE error: illegal byte sequence". And yes, I added the -i "" for OS X. It works otherwise.
– taco
Jun 16 '16 at 19:51
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How do I delete NuGet packages that are not referenced by any project in my solution?
...d package from package directory under solution (and you are still getting error), just open up the *.csproj file in code editor and remove the tag manually. Like for instance, I wanted to get rid of Nuget package Xamarin.Forms.Alias and I removed these lines from *.csproj file.
And finally, don't ...
When to use Comparable and Comparator
... | Comparable | Comparator
._______________________________________________________________________________
Is used to allow Collections.sort to work | yes | yes
Can compare multiple fields | yes ...
VIM + JSLint?
...cter"] + 1) + ":" + obj["reason"] );
This makes in mylintrun.js output a error list that can be used with the VIM quickfix window (:copen).
Now set the following in VIM:
set makeprg=cat\ %\ \\\|\ /my/path/to/js\ /my/path/to/mylintrun.js\ %
set errorformat=%f:%l:%c:%m
where you have to change /...
Regular expression to check if password is “8 characters including 1 uppercase letter, 1 special cha
...ing it would be easier. This would also allow you to provide more directed error messages to your users (other than just Invalid Password) which should improve user experience.
From what I am seeing you are pretty fluent in regex, so I would presume that giving you the regular expressions to do wha...
Get object by id()? [duplicate]
...to the object, e.g: TypeError: cannot create weak reference to 'lxml.etree._Element' object
– darkk
Jun 23 '11 at 9:17
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When NOT to call super() method when overriding?
...super class does not have a default constructor you will get a compilation error if you do not explicitly call one of the constructors of the super class as your first statement in the subclass constructor.
– barsju
Apr 20 '12 at 10:55
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How can I start an interactive console for Perl?
...n OSX 10.10 (Perl 5.18.2) nor on Ubuntu 14.04 (Perl 5.18.2): I get runtime errors complaining about missing modules; installed one, then gave up after another missing module was reported.
– mklement0
Jul 7 '15 at 16:31
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