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Concatenating two lists - difference between '+=' and extend()
...(I just saw that the question ask about concatenating two lists, not numpy array, but since it might be a issue for beginner, such as me, I hope this can help someone who seek the solution to this post), for ex.
import numpy as np
a = np.zeros((4,4,4))
b = []
b += a
it will return with error
Val...
What is the purpose of “!” and “?” at the end of method names?
...re's no need for a distinction, and you shouldn't name it with a bang. See Array#clear, for example. It clears the array. Clearing the array naturally mutates it. There's nothing surprising about that, the name already makes it clear, therefore: no bang. See ruby-forum.com/topic/176830#773946 .
...
Validate decimal numbers in JavaScript - IsNumeric()
... var realStringObj = obj && obj.toString();
return !jQuery.isArray(obj) && (realStringObj - parseFloat(realStringObj) + 1) >= 0;
}
Update :
Angular 4.3:
export function isNumeric(value: any): boolean {
return !isNaN(value - parseFloat(value));
}
...
How to become an OpenCart guru? [closed]
... are assigned in the language file using a special variable $_ which is an array of keys and text values. In your /catalog/language/english/product/search.php you should find something similar to
$_['heading_title'] = 'Search';
The values in the global language file english/english.php are au...
How to convert byte array to string [duplicate]
I created a byte array with two strings. How do I convert a byte array to string?
4 Answers
...
surface plots in matplotlib
...nt than a list of 3-tuples, you should pass in a grid for the domain in 2d arrays.
If all you have is a list of 3d points, rather than some function f(x, y) -> z, then you will have a problem because there are multiple ways to triangulate that 3d point cloud into a surface.
Here's a smooth s...
Populating spinner directly in the layout xml
...of a Spinner right in the layout xml? This page suggests I should use an ArrayAdapter? It seems awkward not being able to do it..
...
Converting NumPy array into Python List structure?
How do I convert a NumPy array to a Python List (for example [[1,2,3],[4,5,6]] ), and do it reasonably fast?
5 Answers
...
Learn C first before learning Objective-C [closed]
...t of graphs. For storing the data necessary to paint the graphs, we used NSArray's. Actually NSMutableArray's, since the graph was animated. Result: Very slow graph animation. We replaced all NSArray's with normal C arrays, objects with structs (after all graph coordinate information is nothing you ...
Bidirectional 1 to 1 Dictionary in C#
...ar();
}
public void CopyTo (KeyValuePair<TFirst, TSecond>[] array, int arrayIndex)
{
_firstToSecond.CopyTo(array, arrayIndex);
}
void ICollection.CopyTo (Array array, int index)
{
((IDictionary)_firstToSecond).CopyTo(array, index);
}
[OnDeseri...