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Why Collections.sort uses merge sort instead of quicksort?
...uced in Java
SE 6) requires substantially less space (O(k)) if the input array is
nearly sorted.
Also, the following is relevant:
The algorithm used by java.util.Arrays.sort and (indirectly) by
java.util.Collections.sort to sort object references is a "modified
mergesort (in which the...
Legality of COW std::string implementation in C++11
...ntially be used to write into s, then s2 goes out of scope, destroying the array pointed to by p).
The C++03 standard explicitly permits that behaviour in 21.3 [lib.basic.string] p5 where it says that subsequent to a call to data() the first call to operator[]() may invalidate pointers, references ...
What does [:] mean?
... do nothing (the line will do the same without [:]), and for a (say) NumPy array, it will create a new view to the same data.
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How to find NSDocumentDirectory in Swift?
...
Apparently, the compiler thinks NSSearchPathDirectory:0 is an array, and of course it expects the type NSSearchPathDirectory instead. Certainly not a helpful error message.
But as to the reasons:
First, you are confusing the argument names and types. Take a look at the function defini...
Passing two command parameters using a WPF binding
...
in my program OnExecute method parameter is a array with null values but, in the converter the values are as expected
– Alex David
Mar 6 '14 at 3:34
3
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Python Pandas: Get index of rows which column matches certain value
...50 True
[3 rows x 1 columns]
Note that loc can also accept boolean arrays:
In [55]: df.loc[df['BoolCol']]
Out[55]:
BoolCol
10 True
40 True
50 True
[3 rows x 1 columns]
If you have a boolean array, mask, and need ordinal index values, you can compute them using np.flatnonze...
jQuery - get a list of values of an attribute from elements of a class
...rn the attribute of first the first .object element.
This will get you an array of all levels:
var list = $(".object").map(function(){return $(this).attr("level");}).get();
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Predicate Delegates in C#
...DateRangeClass> myList = new List<DateRangeClass<GetSomeDateRangeArrayToPopulate);
myList.FindAll(x => (x.StartTime <= minDateToReturn && x.EndTime >= maxDateToReturn):
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Python element-wise tuple operations like sum
...
from numpy import array
a = array( [1,2,3] )
b = array( [3,2,1] )
print a + b
gives array([4,4,4]).
See http://www.scipy.org/Tentative_NumPy_Tutorial
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AngularJS : automatically detect change in model
...to true, Angular will instead "shallow" watch the object for changes. For arrays this means comparing the array items, for object maps this means watching the properties. So this should do what you want:
$scope.$watch('myModel', function() { ... }, true);
Update: Angular v1.2 added a new method...