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What does the “@” symbol mean in reference to lists in Haskell?
...list's tail: pt
Without the @, you'd have to choose between (1) or (2):(3).
This syntax actually works for any constructor; if you have data Tree a = Tree a [Tree a], then t@(Tree _ kids) gives you access to both the tree and its children.
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Notepad++: How to automatically set Language as Xml when load files
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How to create a listbox in HTML without allowing multiple selection?
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Should I compile release builds with debug info as “full” or “pdb-only”?
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edited Nov 30 '16 at 18:25
answered Oct 10 '11 at 13:50
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Python dict how to create key or append an element to key?
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Use dict.setdefault():
dic.setdefault(key,[]).append(value)
help(dict.setdefault):
setde...
When should I use cross apply over inner join?
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How can I use map and receive an index as well in Scala?
...ipWithIndex.foreach{ case (e, i) => println(i+" "+e) }
0 Mary
1 had
2 a
3 little
4 lamb
From: http://www.artima.com/forums/flat.jsp?forum=283&thread=243570
You also have variations like:
for((e,i) <- List("Mary", "had", "a", "little", "lamb").zipWithIndex) println(i+" "+e)
or:
List...
How to print Unicode character in Python?
...Python source code, you can use Unicode escape characters in the form \u0123 in your string, and prefix the string literal with 'u'.
Here's an example running in the Python interactive console:
>>> print u'\u0420\u043e\u0441\u0441\u0438\u044f'
Россия
Strings declared like this are...
What is the zero for string?
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edited May 6 '13 at 11:41
answered Oct 3 '12 at 6:51
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Take all my changes on the current branch and move them to a new branch in Git
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