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Ruby on Rails. How do I use the Active Record .build method in a :belongs to relationship?
...sMethods"
collection.build(attributes = {}, …)
Returns one or more new objects of the
collection type that have been
instantiated with attributes and
linked to this object through a
foreign key, but have not yet been
saved. Note: This only works if an
associated object already ex...
invalid command code ., despite escaping periods, using sed
... '' as argument to -i:
find ./ -type f -exec sed -i '' -e "s/192.168.20.1/new.domain.com/" {} \;
See this.
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What's the “big idea” behind compojure routes?
I'm new to Clojure and have been using Compojure to write a basic web application. I'm hitting a wall with Compojure's defroutes syntax, though, and I think I need to understand both the "how" and the "why" behind it all.
...
Best way to define error codes/strings in Java?
... description;
}
public int getCode() {
return code;
}
@Override
public String toString() {
return code + ": " + description;
}
}
You may want to override toString() to just return the description instead - not sure. Anyway, the main point is that you don't need to override se...
How to affect other elements when one element is hovered
...
If the cube is directly inside the container:
#container:hover > #cube { background-color: yellow; }
If cube is next to (after containers closing tag) the container:
#container:hover + #cube { background-color: yellow; }
If the cube is somewhe...
difference between primary key and unique key
...st point, as it might be take as it is (read one key => one column ) by new comer to sql : )
– ken
Apr 10 '14 at 13:53
...
strdup() - what does it do in C?
...py the characters
return dst; // Return the new string
}
In other words:
It tries to allocate enough memory to hold the old string (plus a '\0' character to mark the end of the string).
If the allocation failed, it sets errno to ENOMEM and returns NULL immediately....
How do I create a class instance from a string name in ruby?
...it('::').inject(Object) {|o,c| o.const_get c}
=> Foo::Bar
> clazz.new
=> #<Foo::Bar:0x0000010110a4f8>
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Show DialogFragment with animation growing from a point
...og builder constructor!
AlertDialog.Builder builder =
new AlertDialog.Builder( getActivity(), R.style.MyCustomTheme );
builder
.setTitle( "Your title" )
.setMessage( "Your message" )
.setPositiveButton( "OK" , new DialogInterface.OnClickListene...
Using PropertyInfo to find out the property type
...l = function(e) {
var $elem = $('.new-login-left'),
docViewTop = $window.scrollTop(),
docViewBottom = docViewTop + $window.height(),
...