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How do I make a column unique and index it in a Ruby on Rails migration?
...
or
rails generate migration add_column_name_to_table_name column_name:string:uniq:index
generates
class AddIndexToModerators < ActiveRecord::Migration
def change
add_column :moderators, :username, :string
add_index :moderators, :username, unique: true
end
end
If you're addin...
Difference between adjustResize and adjustPan in android?
...yboard appears.
When I use adjustResize, it res-size the UI components and at the same time adjustPan gave me same output.
I want to know the difference between them and when to use each component? Which one(adjustPan or adjustResize) is good for resizing UI?
...
How do I read from parameters.yml in a controller in symfony2?
...
final class ApiController extends SymfonyController
{
/**
* @var string
*/
private $apiPass;
/**
* @var string
*/
private $apiUser;
public function __construct(string $apiPass, string $apiUser)
{
$this->apiPass = $apiPass;
$this->...
How do I create a dynamic key to be added to a JavaScript object variable [duplicate]
...names are not special as far as simple property access goes. They're just strings that happen to look like numbers, but JavaScript object property names can be any sort of string you like.
Thus, the way the [ ] operator works in a for loop iterating through an array:
for (var i = 0; i < myArray....
com.jcraft.jsch.JSchException: UnknownHostKey
...t and call
jsch.setKnownHosts(knownHostsFileName);
Or with a public key String as below.
String knownHostPublicKey = "mysite.com ecdsa-sha2-nistp256 AAAAE............/3vplY";
jsch.setKnownHosts(new ByteArrayInputStream(knownHostPublicKey.getBytes()));
see Javadoc for more details.
This would ...
Select last N rows from MySQL
...T 50
) sub
ORDER BY id ASC
This will select the last 50 rows from table, and then order them in ascending order.
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How do I bind a WPF DataGrid to a variable number of columns?
... {
Header = column.Name,
Binding = new Binding(string.Format("[{0}]", index++))
});
}
}
// E.g. myGrid.GenerateColumns(schema);
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jQuery how to bind onclick event to dynamically added HTML element [duplicate]
...ore than one element, a clone of the element to append is created for each and thus the attached event observer is lost.
An alternative way to do it would be to create the link for each element:
function handler() { alert('hello'); }
$('.add_to_this').append(function() {
return $('<a>Click...
Programmatically Hide/Show Android Soft Keyboard [duplicate]
...
Adding this to your code android:focusableInTouchMode="true" will make sure that your keypad doesn't appear on startup for your edittext box. You want to add this line to your linear layout that contains the EditTextBox. You should be able to play wi...
Simple regular expression for a decimal with a precision of 2
...e digit before and one after the decimal place.
To require that the whole string is a number of this form, wrap the expression in start and end tags such as (in Perl's form):
^\d+(\.\d{1,2})?$
To match numbers without a leading digit before the decimal (.12) and whole numbers having a trailing p...