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How to get subarray from array?
I have var ar = [1, 2, 3, 4, 5] and want some function getSubarray(array, fromIndex, toIndex) , that result of call getSubarray(ar, 1, 3) is new array [2, 3, 4] .
...
Why can't I use a list as a dict key in python?
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36
There's a good article on the topic in the Python wiki: Why Lists Can't Be Dictionary Keys. As ...
Fast check for NaN in NumPy
...hine it is about 2.5x faster to use numpy.sum in place of numpy.min:
In [13]: %timeit np.isnan(np.min(x))
1000 loops, best of 3: 244 us per loop
In [14]: %timeit np.isnan(np.sum(x))
10000 loops, best of 3: 97.3 us per loop
Unlike min, sum doesn't require branching, which on modern hardware tends...
How to add an empty column to a dataframe?
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463
If I understand correctly, assignment should fill:
>>> import numpy as np
>>>...
Can I zip more than two lists together in Scala?
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36
I don't believe it's possible to generate a list of tuples of arbitrary size, but the transpose...
Working with $scope.$emit and $scope.$on
...trl:
function firstCtrl($scope)
{
$scope.$broadcast('someEvent', [1,2,3]);
}
function secondCtrl($scope)
{
$scope.$on('someEvent', function(event, mass) { console.log(mass); });
}
In case there is no parent-child relation between your scopes you
can inject $rootScope into the controller a...
LINQ where vs takewhile
...d find all elements matching the condition
var intList = new int[] { 1, 2, 3, 4, 5, -1, -2 };
Console.WriteLine("Where");
foreach (var i in intList.Where(x => x <= 3))
Console.WriteLine(i);
Console.WriteLine("TakeWhile");
foreach (var i in intList.TakeWhile(x => x <= 3))
Console....
Datatype for storing ip address in SQL Server
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130
The technically correct way to store IPv4 is binary(4), since that is what it actually is (no, ...
How to use filter, map, and reduce in Python 3
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352
You can read about the changes in What's New In Python 3.0. You should read it thoroughly when...