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Sending data back to the Main Activity in Android
...data URI to this intent as appropriate.
resultIntent.putExtra("some_key", "String data");
setResult(Activity.RESULT_OK, resultIntent);
finish();
To access the returned data in the calling Activity override onActivityResult. The requestCode corresponds to the integer passed in in the startActivity...
How to display unique records from a has_many through relationship?
...ct => "DISTINCT products.*). In the first case, ALL records are fetched and rails removes the duplicates for you. In the later case, only non-duplicate records are fetched from the db so it might offer better performance if you have a large result set.
– mbreining
...
Create an empty object in JavaScript with {} or new Object()?
...can receive a parameter, and depending on that parameter, it will create a string, a number, or just an empty object.
For example: new Object(1), will return a Number. new Object("hello") will return a string, it means that the object constructor can delegate -depending on the parameter- the object...
What is an Intent in Android?
...);
EditText editText = (EditText) findViewById(R.id.edit_message);
String message = editText.getText().toString();
intent.putExtra(EXTRA_MESSAGE, message);
startActivity(intent);
}
share
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Will HTML5 allow web apps to make peer-to-peer HTTP connections?
...
Web Sockets is not part of HTML5 anymore, but a standalone specification.
– Sergey Ilinsky
Jun 23 '09 at 12:18
8
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Does Java support default parameter values?
...ys to simulate default parameters in Java:
Method overloading.
void foo(String a, Integer b) {
//...
}
void foo(String a) {
foo(a, 0); // here, 0 is a default value for b
}
foo("a", 2);
foo("a");
One of the limitations of this approach is that it doesn't work if you have two optional ...
What is the difference between trie and radix trie data structures?
...ll be root["smiles"[5]]. This brings us to smiles_item, and the end of our string. Our search has terminated, and the item has been retrieved, with just three node accesses instead of eight.
What is a PATRICIA trie?
A PATRICIA trie is a variant of radix tries for which there should only ever be ...
How do you dynamically add elements to a ListView on Android?
...use.
public class ListViewDemo extends ListActivity {
//LIST OF ARRAY STRINGS WHICH WILL SERVE AS LIST ITEMS
ArrayList<String> listItems=new ArrayList<String>();
//DEFINING A STRING ADAPTER WHICH WILL HANDLE THE DATA OF THE LISTVIEW
ArrayAdapter<String> adapter;
...
Using i and j as variables in Matlab
...note the imaginary unit (1j works too). The only exception is when passing strings to the always-slightly-incompatible Symbolic engine. Strange that help 1i and doc 1i don't work though.
– horchler
Jun 2 '13 at 23:45
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Creating rounded corners using CSS [closed]
... manage to support anti-aliasing. There are also ways of using these sans extra markup, you can implement with a class and then the markup is added dynamically to the classed elements. That said, the more I use them the more you seem right...they're useful for prototyping but add a lot of extra we...