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What is a 'semantic predicate' in ANTLR?
...er: it parses an input string consisting of at least
// one number, optionally followed by zero or more comma's and numbers
parse
: number (',' number)* EOF
;
// matches a number that is between 1 and 3 digits long
number
: Digit Digit Digit
| Digit Digit
| Digit
;
// matches a si...
Android Preferences: How to load the default values when the user hasn't used the preferences-screen
...means this will only set the default values if this method has never been called in the past so you don't need to worry about overriding the user's settings each time your Activity is created
Take a look into PreferenceManager.setDefaultValues in Android API for further investigation.
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change html text from link with jquery
...ery's text() function. What it does is:
Get the combined text contents of all
matched elements.
The result is a
string that contains the combined text
contents of all matched elements. This
method works on both HTML and XML
documents. Cannot be used on input
elements. For input field text use the
v...
How to read the Stock CPU Usage data
... screen, showing how much the CPU is being used. The top red bar shows overall CPU usage, and the green bar underneath it shows the CPU time spent in compositing the screen. Note: You cannot turn this feature off once it is on, without restarting the emulator. developer.android.com/tools/debugging/...
How can I git stash a specific file?
....
Not the most user-friendly approach, but it gets the work done if you really need it.
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Setting an object to null vs Dispose()
...When you write a using statement, it's simply syntactic sugar for a try/finally block so that Dispose is called even if the code in the body of the using statement throws an exception. It doesn't mean that the object is garbage collected at the end of the block.
Disposal is about unmanaged resourc...
PHP - Get bool to echo false when false
...
echo $bool_val ? 'true' : 'false';
Or if you only want output when it's false:
echo !$bool_val ? 'false' : '';
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How do I see the last 10 commits in reverse-chronological order with SVN?
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SVN has really useful built-in help. svn help log would probably be even faster than a Google search.
– user229044♦
Apr 20 '10 at 14:13
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Android - Set fragment id
...
You can't set a fragment's ID programmatically.
There is however, a String tag that you can set inside the FragmentTransaction which can be used to uniquely identify a Fragment.
As Aleksey pointed out, you can pass an ID to FragmentTransaction's add(int, Fragment) ...
How do you tell someone they're writing bad code? [closed]
I've been working with a small group of people on a coding project for fun. It's an organized and fairly cohesive group. The people I work with all have various skill sets related to programming, but some of them use older or outright wrong methods, such as excessive global variables, poor naming ...