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Rails: How do I create a default value for attributes in Rails activerecord's model? [duplicate]
...ed this issue just a little while ago, and the options for Rails 3.0 are a bit different, I'll provide another answer to this question.
In Rails 3.0 you want to do something like this:
class MyModel < ActiveRecord::Base
after_initialize :default_values
private
def default_values
...
How do I show the changes which have been staged?
...whether or not they have been staged for commit or not.
Also:
There is a bit more detail on 365Git.
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Set encoding and fileencoding to utf-8 in Vim
...particular mix of characters. Also, IIUC, utf-8 is always big-endian (high bit first) while ucs can be big-endian or little-endian, so if you use it, you will probably need to set 'bomb" (see below)."
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Struct inheritance in C++
...nd multiple inheritance )
here is a code for demonstration
#include<bits/stdc++.h>
using namespace std;
struct parent
{
int data;
parent() : data(3){}; // default constructor
parent(int x) : data(x){}; // parameterized constructor
};
struct child : parent
{
...
Retrieve only static fields declared in Java class
... .collect(toList());
return result;
}
Obviously, that sample is a bit embelished for readability. In actually, you would likely write it like this:
public static List<Field> getStatics(Class<?> clazz) {
return Arrays.stream(clazz.getDeclaredFields()).filter(f ->
...
What are the differences between PMD and FindBugs?
...ay return null, reference comparison of Boolean values, impossible cast, 32bit int shifted by an amount not in the range of 0-31, a collection which contains itself, equals method always returns true, an infinite loop, etc.
Usually each of them finds a different set of problems. Use both. These too...
How do I comment on the Windows command line?
...ion :: that some people use, and this sort of looks like # if you squint a bit and look at it sideways. I originally preferred that variant since I'm a bash-aholic and I'm still trying to forget the painful days of BASIC :-)
Unfortunately, there are situations where :: stuffs up the command line pro...
How to unsubscribe to a broadcast event in angularJS. How to remove function registered via $on
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Technically correct, though a bit misleading, because $scope.$on doesn't have to be unregistered manually on $destroy. A better example would be to use a $rootScope.$on.
– hgoebl
Apr 4 '16 at 13:00
...
Java JTable setting Column Width
...JTable, read the docs for doLayout() very carefully. Here are some choice bits:
When the method is called as a result of the resizing of an enclosing window, the
resizingColumn is null. This means that resizing has taken place "outside" the JTable
and the change - or "delta" - should be dis...
Add a “hook” to all AJAX requests on a page
...
Simply because I've searched a bit for this. The "load" event is only called on success. If you don't care about the result (just that the query did end) you can use the "loadend" event
– Romuald Brunet
Mar 29 '17 at ...