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Read stream twice
How do you read the same inputstream twice? Is it possible to copy it somehow?
10 Answers
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Rails nested form with has_many :through, how to edit attributes of join model?
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Let me know if this was helpful
– Arcolye
Feb 17 '10 at 7:17
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What's the best way to iterate over two or more containers simultaneously
...n which returns a (lazily evaluated) range for the indices. Since the implementation – though simple – is a bit too long to post it here, you can find an implementation on GitHub.
This code is as efficient as using a manual, classical for loop.
If this pattern occurs often in your data, consi...
Are loops really faster in reverse?
I've heard this quite a few times. Are JavaScript loops really faster when counting backward? If so, why? I've seen a few test suite examples showing that reversed loops are quicker, but I can't find any explanation as to why!
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How can I search Git branches for a file or directory?
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git log + git branch will find it for you:
% git log --all -- somefile
commit 55d2069a092e07c56a6b4d321509ba7620664c63
Author: Dustin Sallings <dustin@spy.net>
Date: Tue Dec 16 14:16:22 2008 -0800
added somefile
% git branch -a --contains 55d2069
otherbranch
Supports g...
Find nearest latitude/longitude with an SQL query
...startlng] - longitude) * COS(latitude / 57.3), 2)) AS distance
FROM TableName HAVING distance < 25 ORDER BY distance;
where [starlat] and [startlng] is the position where to start measuring the distance.
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Rails 3 check if attribute changed
...Check out ActiveModel::Dirty (available on all models by default). The documentation is really good, but it lets you do things such as:
@user.street1_changed? # => true/false
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improve th...
What does void* mean and how to use it?
Today when I was reading others' code, I saw something like void *func(void* i); , what does this void* mean here for the function name and for the variable type, respectively?
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Why is the asterisk before the variable name, rather than after the type?
Why do most C programmers name variables like this:
12 Answers
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DROP IF EXISTS VS DROP?
Can someone tell me if there is any difference between
5 Answers
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