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Rails: create on has_one association
...ser = current_user
@shop = Shop.create(params[:shop])
@user.shop = @shop
Now here's why your version did not work:
You probably thought that this might work because if User had a has_many relation to Shop, @user.shops.create(params[:shop]) would work. However there is a big difference between has...
What is the correct way of using C++11's range-based for?
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The above code prints the elements (ints) in the vector:
1 3 5 7 9
Now consider another case, in which the vector elements are not just simple integers,
but instances of a more complex class, with custom copy constructor, etc.
// A sample test class, with custom copy semantics.
class X
{
pu...
TypeScript or JavaScript type casting
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Now, I see that in in doc, referred to as Type Assertions in section 4.13.
– Klaus Nji
Nov 3 '12 at 12:27
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Virtual/pure virtual explained
...ion defines a target function to be executed, but the target might not be known at compile time.
Unlike a non-virtual function, when a virtual function is overridden the most-derived version is used at all levels of the class hierarchy, rather than just the level at which it was created. Therefore...
How to convert a normal Git repository to a bare one?
...f repo with the contents of repo/.git, then tell the repository that it is now a bare repository.
To do this, execute the following commands:
cd repo
mv .git ../repo.git # renaming just for clarity
cd ..
rm -fr repo
cd repo.git
git config --bool core.bare true
Note that this is different from do...
Android adb not found
... I got the same error and then I did apt-get install ia32-libs but now how do I restart the configuration of the ADT tools in eclipse? I am running Ubuntu 12.04
– CodeKingPlusPlus
Jan 20 '13 at 15:51
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Check if a string is a date value
What is an easy way to check if a value is a valid date, any known date format allowed.
20 Answers
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Reversing a linked list in Java, recursively
I have been working on a Java project for a class for a while now. It is an implementation of a linked list (here called AddressList , containing simple nodes called ListNode ). The catch is that everything would have to be done with recursive algorithms. I was able to do everything fine sans one ...
How can I search for a commit message on GitHub?
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Update (2017/01/05):
GitHub has published an update that allows you now to search within commit messages from within their UI. See blog post for more information.
I had the same question and contacted someone GitHub yesterday:
Since they switched their search engine to Elasticsearch it's ...
Detecting a redirect in ajax request?
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Welcome to the future!
Right now we have a "responseURL" property from xhr object. YAY!
See How to get response url in XMLHttpRequest?
However, jQuery (at least 1.7.1) doesn't give an access to XMLHttpRequest object directly.
You can use something like...