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How to organize large R programs?
When I undertake an R project of any complexity, my scripts quickly get long and confusing.
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Python Infinity - Any caveats?
So Python has positive and negative infinity:
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C++ project organisation (with gtest, cmake and doxygen)
...g a simple vector class in C++. However I would like to get in to good habits from the start rather than trying to modify my workflow later on.
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How can I make git ignore future revisions to a file?
I have created a default version of a file included in a git repository. It's important that when someone clones the repository, they get a copy of this file. However, I would like to set git so that it ignores changes to this file later. .gitignore works only on untracked files.
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Regex to check whether a string contains only numbers [duplicate]
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var reg = /^\d+$/;
should do it. The original matches anything that consists of exactly one digit.
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Does a foreign key automatically create an index?
... a constraint, a relationship between two tables - that has nothing to do with an index per se.
But it is a known fact that it makes a lot of sense to index all the columns that are part of any foreign key relationship, because through a FK-relationship, you'll often need to lookup a relating table...
Remove secure warnings (_CRT_SECURE_NO_WARNINGS) from projects by default in Visual Studio
...gs that come up when using functions like scanf(). I found that you can do it by adding a line in the project option or a #define _CRT_SECURE_NO_WARNINGS in the beginning of the code.
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Padding within inputs breaks width 100%
Ok, so we know that setting padding to an object causes its width to change even if it is set explicitly. While one can argue the logic behind this, it causes some problems with some elements.
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How do I check if an object has a specific property in JavaScript?
...perty] or, even worse, x.key will give you completely misleading results.
It depends on what you're looking for. If you want to know if an object physically contains a property (and it is not coming from somewhere up on the prototype chain) then object.hasOwnProperty is the way to go. All modern br...
What is an existential type?
... because of the existential operator (∃). I'm not sure what the point of it is, though. What's the difference between
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