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Finding out whether a string is numeric or not
How can we check if a string is made up of numbers only. I am taking out a substring from a string and want to check if it is a numeric substring or not.
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Static and Sealed class differences
... Hossein Narimani RadHossein Narimani Rad
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Plot correlation matrix into a graph
...x with some correlation values. Now I want to plot that in a graph that looks more or less like that:
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Find all records which have a count of an association greater than zero
... projects that have an associated vacancy.
UPDATE:
As pointed out by @mackskatz in the comment, without a group clause, the code above will return duplicate projects for projects with more than one vacancies. To remove the duplicates, use
Project.joins(:vacancies).group('projects.id')
UPDATE:
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What's wrong with using == to compare floats in Java?
...- currentSectionID) < epsilon)
where epsilon is a very small number like 0.00000001, depending on the desired precision.
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Printing tuple with string formatting in Python
...; print "this is a tuple: %s" % (thetuple,)
this is a tuple: (1, 2, 3)
Making a singleton tuple with the tuple of interest as the only item, i.e. the (thetuple,) part, is the key bit here.
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How to rename a file using Python
I want to change a.txt to b.kml .
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Unit testing for C++ code - Tools and methodology [closed]
I'm working on a large c++ system that is has been in development for a few years now. As part of an effort to improve the quality of the existing code we engaged on a large long-term refactoring project.
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Undo git pull, how to bring repos to old state
...so, but only merge other remaining files. So, I want to get those files back, is that possible?
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Remove directory from remote repository after adding them to .gitignore
... .gitignore file adding a directory that should be ignored. Everything works fine, but the (now ignored) directory stays on github.
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