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How do I specify unique constraint for multiple columns in MySQL?
... That way combination of three would be unique? Or all individual three columns would be unique?
– Gary Lindahl
Sep 15 '11 at 0:03
100
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Javascript Shorthand for getElementById
Is there any shorthand for the JavaScript document.getElementById? Or is there any way I can define one? It gets repetitive retyping that over and over .
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Problems with Android Fragment back stack
I've got a massive problem with the way the android fragment backstack seems to work and would be most grateful for any help that is offered.
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How to add items to a spinner in Android?
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XML file:
<Spinner
android:id="@+id/Spinner01"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
Java file:
public class SpinnerExample extends Activity {
@Override
public void onCreate(Bundle savedIns...
How to create ASP.NET Web API Url?
...
string url = Url.Route("DefaultApi", new { controller = "values", id = "123" });
return new string[] { "value1", "value2" };
}
// GET /api/values/5
public string Get(int id)
{
return "value";
}
...
}
This UrlHelper doesn't exist neither in your vi...
Design for Facebook authentication in an iOS app that also accesses a secured web service
... to register for an account with you entirely separate from their Facebook ID, right? Then some other time they log in with Facebook.... And you just created them a second account and lost their first one.
There needs to be a way to be logged in to your web service, then log in to facebook, and ca...
Angular ng-repeat Error “Duplicates in a repeater are not allowed.”
...ason this error happens is that angular is using a dictionary to store the id of an item as the key with the value as the DOM reference. From the code (line 15402 in angular.js) it looks like they are caching previously found DOM elements based on their key as a performance optimization. Since they...
How can I decrease the size of Ratingbar?
...tingBar with either ratingBarStyleSmall or a custom style inheriting from Widget.Material.RatingBar.Small (assuming you're using Material Design in your app).
Option 1:
<RatingBar
android:id="@+id/ratingBar"
style="?android:attr/ratingBarStyleSmall"
... />
Option 2:
// styles....
Check whether an input string contains a number in javascript
My end goal is to validate an input field. The input may be either alphabetic or numeric.
12 Answers
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Can I query MongoDB ObjectId by date?
I know that ObjectIds contain the date they were created on. Is there a way to query this aspect of the ObjectId?
12 Answer...