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belongs_to through associations
...ter off caching the question_id on Choice and adding a unique index to the table (especially because validates_uniqueness_of is prone to race conditions).
If you're paranoid, add a custom validation to Choice that confirms that the answer's question_id matches, but it sounds like the end user shoul...
AngularJS ngClass conditional
...
Using ng-class inside ng-repeat
<table>
<tbody>
<tr ng-repeat="task in todos"
ng-class="{'warning': task.status == 'Hold' , 'success': task.status == 'Completed',
'active': task.status == 'Started', '...
Combine two ActiveRecord::Relation objects
...ny odd situations, by using Rails' built-in Arel.
User.where(
User.arel_table[:first_name].eq('Tobias').or(
User.arel_table[:last_name].eq('Fünke')
)
)
This merges both ActiveRecord relations by using Arel's or.
Merge, as was suggested here, didn't work for me. It dropped the 2nd set...
What is a simple command line program or script to backup SQL server databases?
...tructure to access MSSQL databases. Here's a simple shell script to dump a table to a file:
#!/usr/bin/ksh
#
#.....
(
tsql -S {database} -U {user} -P {password} <<EOF
select * from {table}
go
quit
EOF
) >{output_file.dump}
...
JPA: How to have one-to-many relation of the same Entity type
...both). But this resulted in a duplicate row being inserted into my Address table. Is this because I have misconfigured my CascadeType on the User's address field?
– Alex
Aug 25 '13 at 12:17
...
Is ASCII code 7-bit or 8-bit?
...
The original ASCII table is encoded on 7 bits therefore it has 128 characters.
Nowadays most readers/editors use an "extended" ASCII table (from ISO 8859-1), which is encoded on 8 bits and enjoys 256 characters (including Á, Ä, Œ, é, è an...
What is the difference between loose coupling and tight coupling in the object oriented paradigm?
...r", CustomerName);
}
}
class Database
{
public void AddRow(string Table, string Value)
{
}
}
Example of loose coupling:
class CustomerRepository
{
private readonly IDatabase database;
public CustomerRepository(IDatabase database)
{
this.database = database;
...
How to encrypt/decrypt data in php?
...
Foreword
Starting with your table definition:
- UserID
- Fname
- Lname
- Email
- Password
- IV
Here are the changes:
The fields Fname, Lname and Email will be encrypted using a symmetric cipher, provided by OpenSSL,
The IV field will store the init...
jQuery Selector: Id Ends With?
...ture segments of a title, such as if ID appeard as "masterPage1_Control0_MyTableName_moreStuff" in View Source, I could lock onto the my table of <asp:Table ID="MyTable" ... by using $("id*=MyTable]"). Come to think of it, I like id$ better. Hmmm...
– Lukas
...
Align contents inside a div
...s to work in IE6, you need to make sure Standards Mode is on by using a suitable DOCTYPE.
If you really need to support IE5/Quirks Mode, which these days you shouldn't really, it is possible to combine the two different approaches to centering:
<div style="text-align: center">
<div st...