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For i = 0, why is (i += i++) equal to 0?
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This:
int i = 0;
i += i++
Can be seen as you doing (the following is a gross oversimplification):
int i = 0;
i = i + i; // i=0 because the ++ is a postfix operator and hasn't been executed
i + 1; // Note that you are discarding the calc...
How to access the ith column of a NumPy multidimensional array?
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>>> test[:,0]
array([1, 3, 5])
Similarly,
>>> test[1,:]
array([3, 4])
lets you access rows. This is covered in Section 1.4 (Indexing) of the NumPy reference. This is quick, at least in my experience. It's certainly muc...
Swapping column values in MySQL
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204
I just had to deal with the same and I'll summarize my findings.
The UPDATE table SET X=Y, Y=...
how to draw smooth curve through N points using javascript HTML5 canvas?
...w.
This solution was extracted out of the book "Foundation ActionScript 3.0 Animation: Making things move". p.95 - rendering techniques: creating multiple curves.
Note: this solution does not actually draw through each of the points, which was the title of my question (rather it approximates the ...
Cannot ping AWS EC2 instance
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answered May 30 '15 at 9:39
RakibRakib
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Google Maps API 3 - Custom marker color for default (dot) marker
...s:
http://chart.apis.google.com/chart?chst=d_map_pin_letter&chld=%E2%80%A2|FE7569
Which looks like this: the image is 21x34 pixels and the pin tip is at position (10, 34)
And you'll also want a separate shadow image (so that it doesn't overlap nearby icons):
http://chart.apis.google.com/ch...
Define a lambda expression that raises an Exception
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170
There is more than one way to skin a Python:
y = lambda: (_ for _ in ()).throw(Exception('fooba...
Apply a function to every row of a matrix or a data frame
... 3 4
[3,] 5 6
R> apply(M, 1, function(x) 2*x[1]+x[2])
[1] 4 10 16
R>
This takes a matrix and applies a (silly) function to each row. You pass extra arguments to the function as fourth, fifth, ... arguments to apply().
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Adding gif image in an ImageView in android
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80
First, copy your GIF image into Asset Folder of your app
create following classes and paste the ...