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Elegant way to invert a map in Scala
...alues are unique, this works:
(Map() ++ origMap.map(_.swap))
On Scala 2.8, however, it's easier:
origMap.map(_.swap)
Being able to do that is part of the reason why Scala 2.8 has a new collection library.
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How to define a two-dimensional array?
...s this
"list comprehension".
# Creates a list containing 5 lists, each of 8 items, all set to 0
w, h = 8, 5;
Matrix = [[0 for x in range(w)] for y in range(h)]
You can now add items to the list:
Matrix[0][0] = 1
Matrix[6][0] = 3 # error! range...
Matrix[0][6] = 3 # valid
Note that the matrix...
PHP - iterate on string characters
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181
Step 1: convert the string to an array using the str_split function
$array = str_split($your_s...
Android: How can I get the current foreground activity (from a service)?
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Is there a native android way to get a reference to the currently running Activity from a se...
Best way to obfuscate an e-mail address on a website?
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108
I encode the characters as HTML entities (something like this). It doesn't require JS to be enab...
What is the use of hashCode in Java?
... John TopleyJohn Topley
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What does status=canceled for a resource mean in Chrome Developer Tools?
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edited Nov 9 '15 at 8:35
holdfenytolvaj
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How to prevent Node.js from exiting while waiting for a callback?
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Javascript - remove an array item by value [duplicate]
...l want to use JavaScript's Array splice method:
var tag_story = [1,3,56,6,8,90],
id_tag = 90,
position = tag_story.indexOf(id_tag);
if ( ~position ) tag_story.splice(position, 1);
P.S. For an explanation of that cool ~ tilde shortcut, see this post:
Using a ~ tilde with indexOf to check...
Serializing with Jackson (JSON) - getting “No serializer found”?
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18 Answers
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