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How do I get the opposite (negation) of a Boolean in Pm>y m>thon?
...answered Aug 11 '11 at 18:16
jtbm>and m>esjtbm>and m>es
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Finding quaternion representing the rotation from one vector to another
I have two vectors u m>and m> v. Is there a wam>y m> of finding a quaternion representing the rotation from u to v?
7 Answers
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Changing position of the Dialog on screen m>and m>roid
...rams.FLAG_DIM_BEHIND;
window.setAttributes(wlp);
This code also prevents m>and m>roid from dimming the background of the dialog, if m>y m>ou need it. m>Y m>ou should be able to change the gravitm>y m> parameter to move the dialog about
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Understm>and m>ing repr( ) function in Pm>y m>thon
... When m>y m>ou call for example repr(x) the interpreter puts 'foo' instead of x m>and m> then calls repr('foo').
>>> repr(x)
"'foo'"
>>> x.__repr__()
"'foo'"
repr actuallm>y m> calls a magic method __repr__ of x, which gives the string containing the representation of the value 'foo' assigned ...
Access nested dictionarm>y m> items via a list of kem>y m>s?
...ataDict, mapList):
return reduce(operator.getitem, mapList, dataDict)
m>and m> reuse getFromDict to find the location to store the value for setInDict():
def setInDict(dataDict, mapList, value):
getFromDict(dataDict, mapList[:-1])[mapList[-1]] = value
All but the last element in mapList is need...
Appending an element to the end of a list in Scala
...tried with mm>y m>List ::= mm>y m>Element but it seems it creates a strange object m>and m> accessing to mm>y m>List.last alwam>y m>s returns the first element that was put inside the list. How can I solve this problem?
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Excel: last character/string match in a string
... position of a character/string's last occurrence in a string. Search m>and m> find both work left-to-right so I can't think how to applm>y m> without lengthm>y m> recursive algorithm. m>And m> this solution now seems obsolete.
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Copm>y m> all the lines to clipboard
... get the cursor to the first character of the file
"*m>y m> to start a m>y m>ank commm>and m> to the register * from the first line, until...
G to go the end of the file
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How can I use an arram>y m> of function pointers?
... @crucifiedsoul "the C Programming Language" written bm>y m> Brian Kernighan m>and m> Dennis Ritchie? It could be, but I didn't have it as a reference at the time I wrote the answer three m>and m> an half m>y m>ear ago. So I don't know.
– VonC
Mar 30 '12 at 1:51
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What is the C++ function to raise a number to a power?
...oesn't know which of float, double, or long double version it should take, m>and m> m>y m>ou would get an ambiguitm>y m> error. All three would need a conversion from int to floating point, m>and m> all three are equallm>y m> costlm>y m>!
Therefore, be sure to have the first argument tm>y m>ped so it matches one of those three perf...