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When should I use a composite index?
...ence Manual page:
A multiple-column index can be
considered a sorted array containing
values that are created by
concatenating the values of the
indexed columns.
If you use seperated index for geolat and geolng columns, you have two different index in your table which you can search in...
How do you specify a byte literal in Java?
...
This is useful. If you're trying to fill an array of bytes using java's 'fill' method, this is most sensible.
– user1086498
Jul 11 '12 at 20:01
...
Android LinearLayout Gradient Background
...
With Kotlin you can do that in just 2 lines
Change color values in the array
val gradientDrawable = GradientDrawable(
GradientDrawable.Orientation.TOP_BOTTOM,
intArrayOf(Color.parseColor("#008000"),
...
Is .NET/Mono or Java the better choice for cross-platform development? [closed]
...ts parts of the CLR spec that even Microsoft does not support (like 64 bit arrays). One of the most exciting new pieces of technology in the .NET world is Rosylyn. Mono has offered the C# compiler as a service for many years. Some of what Rosylyn offers is available via NRefractory as well. An examp...
Creating a simple XML file using python
...o many Objects getting 'in the way'.
As for the tag and value, I used two arrays, one which gave the tag name and position in the output xml and another which referenced a parameter file having the same list of tags. The parameter file, however, also has the position number in the corresponding in...
How to access custom attributes from event object in React?
...in the fashion as outlined above is like unshifting the function arguments array. If the "event object" was at index 0 it would now be at index 1.
– Ryder Brooks
Mar 11 '15 at 1:02
...
Getting a better understanding of callback functions in JavaScript
...e method you choose depends whether:
You have the arguments stored in an Array or as distinct variables.
You want to call that function in the context of some object. In this case, using the "this" keyword in that callback would reference the object passed as argument in call() or apply(). If you ...
Why shouldn't I use PyPy over CPython if PyPy is 6.3 times faster?
...umerics. For numerics, Python is just used to ferry around pointers to big arrays. So PyPy being "as fast as C" means "your pointers+metadata get moved around as fast as C". Not a big deal. Then why bother with Python at all? Go look at the function signatures in cblas and lapacke.
...
Limit results in jQuery UI Autocomplete
...tion(request, response) {
var results = $.ui.autocomplete.filter(myarray, request.term);
response(results.slice(0, 10));
}
});
You can supply a function to the source parameter and then call slice on the filtered array.
Here's a working example: http://jsfiddle.net/andrewwhit...
Integrating the ZXing library directly into my Android application
...final String NOTE_KEY = "NOTE_KEY";
// When using Type.CONTACT, these arrays provide the keys for adding or retrieving multiple phone numbers and addresses.
public static final String[] PHONE_KEYS = {
ContactsContract.Intents.Insert.PHONE, ContactsContract.Intents.Insert.SECONDA...