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What's is the difference between train, validation and test set, in neural networks?
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Python __call__ special method practical example
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Most efficient way to check for DBNull and then assign to a variable?
This question comes up occasionally, but I haven't seen a satisfactory answer.
15 Answers
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Should I use single or double colon notation for pseudo-elements?
...n browsers support the single-colon notation (e.g. :after ) for backwards compatibility, should I use solely the single-colon notation and when IE8's market share drops to a negligible level go back and find/replace in my code base? Or should I include both:
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How do I 'overwrite', rather than 'merge', a branch on another branch in Git?
...merge parents in the correct order, need perform this action with a single command line invocation, and don't mind running plumbing commands, you can do the following:
$ git checkout A
$ git merge --ff-only $(git commit-tree -m "Throw away branch 'A'" -p A -p B B^{tree})
This basically acts like th...
Is APC compatible with PHP 5.4 or PHP 5.5?
...se who depend on APC for it's opcode caching to test their code with the upcoming built-in opcode cache, and feed back any issues encountered to ensure a stable final release.
I do not know what this means for the future of APC.
APC FOR PHP 5.4+ IS STILL FLAGGED AS BETA
This means the developers do ...
How can I use optional parameters in a T-SQL stored procedure?
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Dynamically changing searches based on the given parameters is a complicated subject and doing it one way over another, even with only a very slight difference, can have massive performance implications. The key is to use an index, ignore compact code, ignore worrying about repeating code...
How to reset postgres' primary key sequence when it falls out of sync?
...ur_table_id_seq', COALESCE((SELECT MAX(id)+1 FROM your_table), 1), false);
COMMIT;
Source - Ruby Forum
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How to convert std::string to lower case?
...hate tolower(), here's a specialized ASCII-only alternative that I don't recommend you use:
char asciitolower(char in) {
if (in <= 'Z' && in >= 'A')
return in - ('Z' - 'z');
return in;
}
std::transform(data.begin(), data.end(), data.begin(), asciitolower);
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Shorter syntax for casting from a List to a List?
...Y = listOfX.Cast<Y>().ToList();
Some things to be aware of (H/T to commenters!)
You must include using System.Linq; to get this extension method
This casts each item in the list - not the list itself. A new List<Y> will be created by the call to ToList().
This method does not suppor...