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Scala: Nil vs List()
...println (Nil equals List())
true
scala> System.identityHashCode(Nil)
374527572
scala> System.identityHashCode(List())
374527572
Nil is more idiomatic and can be preferred in most cases.
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Bare asterisk in function arguments?
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KimvaisKimvais
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Adding a new array element to a JSON object
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242
JSON is just a notation; to make the change you want parse it so you can apply the changes to a...
Group by with multiple columns using lambda
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edited Nov 25 '14 at 14:41
answered Aug 4 '11 at 2:11
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Script parameters in Bash
... ocrscript.sh
$1 # -from
$2 # /home/kristoffer/test.png
$3 # -to
$4 # /home/kristoffer/test.txt
It might be easier to omit the -from and the -to, like:
ocrscript.sh /home/kristoffer/test.png /home/kristoffer/test.txt
Then you'll have:
$1 # /home/kristoffer/test.png
$2 # /home...
OSError: [Errno 2] No such file or directory while using python subprocess in Django
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Ashwini ChaudharyAshwini Chaudhary
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How do I view the list of functions a Linux shared library is exporting?
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4 Answers
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How to trace the path in a Breadth-First Search?
...raph is in adjacent list representation
graph = {
'1': ['2', '3', '4'],
'2': ['5', '6'],
'5': ['9', '10'],
'4': ['7', '8'],
'7': ['11', '12']
}
def bfs(graph, start, end):
# maintain a queue of paths
queue = []
# push the first path into t...
How to trim leading and trailing white spaces of a string?
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answered Mar 27 '14 at 12:52
peterSOpeterSO
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Intersection of two lists in Bash
...red Apr 23 '10 at 3:58
ghostdog74ghostdog74
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