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How do you extract a column from a multi-dimensional array?
...ensional arrays. Normal Python lists are single-dimensional too.
However, if you have a simple two-dimensional list like this:
A = [[1,2,3,4],
[5,6,7,8]]
then you can extract a column like this:
def column(matrix, i):
return [row[i] for row in matrix]
Extracting the second column (in...
How to get Spinner value?
...title (as in, the String that is displayed to the user), but not its value if you mapped an int array onto the spinner for example.
– A. Steenbergen
Feb 5 '15 at 13:58
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Guava: Why is there no Lists.filter() function?
...ppose it could require that the predicate matching didn't change over the lifetime of the view, but that would be not-entirely-satisfactory.
(This is just guessing, mind you. Maybe one of the Guava maintainers will chip in with the real reason :)
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Best way to extract a subvector from a vector?
...egRogers: It doesn't make sense to use the big-O notation where N is a specific number. Big-O communicates the rate of growth with respect to how N changes. Johann: It's best not to use one variable name in two ways. We'd normally say either O(Y-X), or we'd say O(Z) where Z=Y-X.
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How do I escape curly braces for display on page when using AngularJS?
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what if the {{value}} is inside of an input tag value?
– Timo Huovinen
Aug 21 '15 at 12:15
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How to get the second column from command output?
...) is being printed. To help visualize it, this is what it would look like if we wanted to add blank spaces around $2 instead of quotation marks: '{print " "$2" "}'. We can also add format spacing to make it a little easier to grok: '{print " " $2 " "}'
– Tom
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How do I set up a basic Ruby project?
...wed by most Ruby developers.
I would only create custom exception classes if I wasn't able to find any class in the standard library fits the error description. Nest your error class under the class or module that raises it:
class Parser::Error < RuntimeError; end
begin
Parser.new(:invalid)....
How to set delay in android?
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@EugeneH Use Live Templates for easier life stackoverflow.com/a/16870791/4565796
– Saeed Arianmanesh
Aug 31 '19 at 7:09
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Why does Android use Java? [closed]
... phones already used Java ME, so Java was known in the industry
the speed difference is not an issue for most applications; if it was you should code in low-level language
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getApplicationContext(), getBaseContext(), getApplication(), getParent()
What is the difference between:
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