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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]
...
How to update a git clone --mirror?
...dish ö :)): Git fetch just updates your repository with remote references from the remote. This command updates everything on the mirrored repository.
– ralphtheninja
May 27 '11 at 12:25
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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...
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?...
Create an array with random values
How can I create an array with 40 elements, with random values from 0 to 39 ?
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21 Answers
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What is an idempotent operation?
...re than once with the same input parameters. For example, removing an item from a set can be considered an idempotent operation on the set.
In mathematics, an idempotent operation is one where f(f(x)) = f(x). For example, the abs() function is idempotent because abs(abs(x)) = abs(x) for all x.
Th...
Android Split string
... other ways to do it. For instance, you can use the StringTokenizer class (from java.util):
StringTokenizer tokens = new StringTokenizer(currentString, ":");
String first = tokens.nextToken();// this will contain "Fruit"
String second = tokens.nextToken();// this will contain " they taste good"
// ...
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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When to delete branches in Git?
...oping.
Delete old branches with
git branch -d branch_name
Delete them from the server with
git push origin --delete branch_name
or the old syntax
git push origin :branch_name
which reads as "push nothing into branch_name at origin".
That said, as long as the DAG (directed acyclic graph) ...
Pass parameter to controller from @Html.ActionLink MVC 4
...n ActionLink. So get rid of it and also remove the BlogPostModel parameter from your controller action. You should use the blogPostId parameter to retrieve the model from wherever this model is persisted, or if you prefer from wherever you retrieved the model in the GET action:
public ActionResult ...