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What are all the uses of an underscore in Scala?
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590
The ones I can think of are
Existential types
def foo(l: List[Option[_]]) = ...
Higher kin...
Java String - See if a string contains only numbers and not letters
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edited Jan 8 '15 at 13:34
unwichtich
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Sort Dictionary by keys
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let dictionary = [
"A" : [1, 2],
"Z" : [3, 4],
"D" : [5, 6]
]
let sortedKeys = Array(dictionary.keys).sorted(<) // ["A", "D", "Z"]
EDIT:
The sorted array from the above code contains keys only, while values have to be retrieved from the original dictionary. However, 'Dict...
Determine device (iPhone, iPod Touch) with iOS
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answered Jan 15 '09 at 19:54
Adam RosenfieldAdam Rosenfield
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How to do ssh with a timeout in a script?
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edited Mar 7 at 3:05
Eric Leschinski
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Best way to initialize (empty) array in PHP
...s that may look like functions but aren't treated as such. Even with PHP 5.4, which supports [] as an alternative, there is no difference in overhead because, as far as the compiler/parser is concerned, they are completely synonymous.
// Before 5.4, you could only write
$array = array(
"foo" ...
iReport not starting using JRE 8
I have downloaded and installed the iReport 4.5 using te Windows installer. But when I try to start the iReport it shows the splash screen but does not start.
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How to concatenate properties from multiple JavaScript objects
...Use a transpiler like Babel and Traceur to generate backwards-compatible ES5 JavaScript.
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Simplest way to do a fire and forget method in c# 4.0
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Not an answer for 4.0, but worth noting that in .Net 4.5 you can make this even simpler with:
#pragma warning disable 4014
Task.Run(() =>
{
MyFireAndForgetMethod();
}).ConfigureAwait(false);
#pragma warning restore 4014
The pragma is to disable the warning that tells yo...