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Are HLists nothing more than a convoluted way of writing tuples?
.... shapeless provides a form of polymorphic function value which allows the compiler to select type-specific cases in exactly the way you're doubtful about. For instance,
// size is a function from values of arbitrary type to a 'size' which is
// defined via type specific cases
object size extends P...
Skip download if files exist in wget?
... existing files.
Sample usage:
wget -nc http://example.com/pic.png
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What's a redirect URI? how does it apply to iOS app for OAuth2.0?
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Read this:
http://www.quora.com/OAuth-2-0/How-does-OAuth-2-0-work
or an even simpler but quick explanation:
http://agileanswer.blogspot.se/2012/08/oauth-20-for-my-ninth-grader.html
The redirect URI is the callback entry point of the app. Think about ...
How to understand nil vs. empty vs. blank in Ruby
... nil? , blank? , and empty? in Ruby on Rails. Here's the closest I've come:
14 Answers
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Can Git hook scripts be managed along with the repository?
...basic hook scripts that we can all share -- for things like pre-formatting commit messages. Git has hook scripts for that that are normally stored under <project>/.git/hooks/ . However, those scripts are not propagated when people do a clone and they are not version controlled.
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How to convert a char array back to a string?
... into individual chars and join them back is not required in normal code.
Compare this to C/C++ where "foo" you have a bundle of chars terminated by a zero byte on one side and string on the other side and many conversions between them due do legacy methods.
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How can I upload fresh code at github?
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git init
git add .
git commit -m "Initial commit"
After this, make a new GitHub repository and follow on-screen instructions.
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How can I perform a `git pull` without re-entering my SSH password?
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Have a look at this link https://help.github.com/articles/working-with-ssh-key-passphrases/
But I don’t want to enter a long passphrase every time I use the key!
Neither do I! Thankfully, there’s a nifty little tool called
ssh-agent that can save your pas...