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CSS selector for first element with class
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17 Answers
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What is the right way to override a setter method in Ruby on Rails?
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Update: July 19, 2017
Now the Rails documentation is also suggesting to use super like this:
class Model < ActiveRecord::Base
def attribute_name=(value)
# custom actions
###
super(value)
end
end
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Testing the type of a DOM element in JavaScript
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125
You can use typeof(N) to get the actual object type, but what you want to do is check the tag,...
how to override action bar back button in android?
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10 Answers
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Which characters are illegal within a branch name?
...ASCII control characters (i.e. bytes whose values are lower than \040, or \177 DEL), space, tilde ~, caret ^, or colon : anywhere.
They cannot have question-mark ?, asterisk *, or open bracket [ anywhere. See the --refspec-pattern option below for an exception to this rule.
They cannot begin or en...
Why there can be only one TIMESTAMP column with CURRENT_TIMESTAMP in DEFAULT clause?
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173
This limitation, which was only due to historical, code legacy reasons, has been lifted in rec...
Changing the case of a string in Eclipse
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edited Oct 15 '15 at 11:54
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answered Jul 22 '11 at 17:14
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How to use GNU Make on Windows?
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101
Here's how I got it to work:
copy c:\MinGW\bin\mingw32-make.exe c:\MinGW\bin\make.exe
The...
Why doesn't the example compile, aka how does (co-, contra-, and in-) variance work?
...Java arrays (which are erroneously covariant):
Object[] arr = new Integer[1];
arr[0] = "Hello, there!";
We just assigned a value of type String to an array of type Integer[]. For reasons which should be obvious, this is bad news. Java's type system actually allows this at compile time. The JVM...
'typeid' versus 'typeof' in C++
...ou are talking about GCC's typeof, then a similar feature is present in C++11 through the keyword decltype. Again, C++ has no such typeof keyword.
typeid is a C++ language operator which returns type identification information at run time. It basically returns a type_info object, which is equality-...