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All Ruby tests raising: undefined method `authenticate' for nil:NilClass
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edited Aug 7 '13 at 14:15
Guillaume
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ans...
hexadecimal string to byte array in python
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>>> hex_data
"\xde\xad\xbe\xef"
or since Python 2.7 and Python 3.0:
>>> bytes.fromhex(hex_string) # Python ≥ 3
b'\xde\xad\xbe\xef'
>>> bytearray.fromhex(hex_string)
bytearray(b'\xde\xad\xbe\xef')
Note that bytes is an immutable version of bytearray.
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Does a const reference class member prolong the life of a temporary?
...ences prolong the lifespan.
The standard specifies such behavior in §8.5.3/5, [dcl.init.ref], the section on initializers of reference declarations. The reference in your example is bound to the constructor's argument n, and becomes invalid when the object n is bound to goes out of scope.
The lif...
Comparing two CGRects
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Johannes Fahrenkrug
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answered Sep 16 '13 at 3:44
Amelia777Am...
Remove characters from NSString?
... Mundi
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answered May 29 '09 at 12:45
Tom JefferysTom Jefferys
12.6...
What is the mouse down selector in CSS?
...ticed that buttons and other elements have a default styling and behave in 3 steps: normal view, hover/focus view and mousedown/click view, in CSS I can change the styling of normal view and hover view like this:
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Laravel stylesheets and javascript don't load for non-base routes
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someOne
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answered May 15 '13 at 12:58
gangan
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How to escape a JSON string containing newline characters using JavaScript?
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avngr
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answered Nov 23 '10 at 6:41
AlexAlex
56....
Knight's Shortest Path on Chessboard
...e moves are disconnected (value=0), the sparse matrix would be like:
(a1,b3)=1,
(a1,c2)=1,
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And the shortest path of two points in a graph can be found using http://en.wikipedia.org/wiki/Dijkstra's_algorithm
Pseudo-code from wikipedia-page:
function Dijkstra(Graph, source):
for each v...
Java variable number or arguments for a method
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edited Oct 20 '17 at 1:43
ErikE
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answered...