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How can I quantify difference between two images?
...if they are color (RGB) images.
You will need these imports:
import sys
from scipy.misc import imread
from scipy.linalg import norm
from scipy import sum, average
Main function, read two images, convert to grayscale, compare and print results:
def main():
file1, file2 = sys.argv[1:1+2]
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Remove scrollbar from iframe
... prevents scrolling the content. it doesn't prevent the iframe's scrollbar from appearing.
– Dave Cousineau
Jun 22 '15 at 1:44
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What is aspect-oriented programming?
...flow. These can be almost impossible to trace, especially when they derive from that system's version of aspects, which it calls roles. One can compose systems of staggering complexity with all this.
– tchrist
Mar 19 '16 at 23:03
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What is “Orthogonality”?
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This answer reminds me of "superposition" theory from signal and systems.
– Özgür
Jul 8 '10 at 22:08
1
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How to test code dependent on environment variables using JUnit?
...en gets the environment variable using the Environment class, not directly from System.getenv().
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How to access the last value in a vector?
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Doesn't work if you want to add stuff from vectors though tail(vector, n=1)-tail(vector, n=2)
– Andreas Storvik Strauman
Mar 19 '18 at 17:47
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In C#, should I use string.Empty or String.Empty or “” to intitialize a string?
...ore readable is a different matter, however. It's subjective and will vary from person to person - so I suggest you find out what most people on your team like, and all go with that for consistency. Personally I find "" easier to read.
The argument that "" and " " are easily mistaken for each other...
Get value from NSTextField
...eTextField intValue];
There are many other methods for getting the value from a control. Have a look at the NSControl reference for more info, under the "Getting and Setting the Control’s Value" section.
Here's a list:
doubleValue
floatValue
intValue
integerValue
objectValue
stringValue
attri...
What is an “unwrapped value” in Swift?
...ar cantBeNil : Int = 4
cantBeNil = nil // can't do this
To get the value from your variable if it is optional, you have to unwrap it. This just means putting an exclamation point at the end.
var canBeNil : Int? = 4
println(canBeNil!)
Your code should look like this:
let optionalSquare: Square?...
Private virtual method in C++
...exist to allow customization; unless they also need to be invoked directly from within derived classes' code, there's no need to ever make them anything but private
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