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ANTLR: Is there a simple example?
...message, and the files ExpLexer.java, ExpParser.java and Exp.tokens should now be generated.
To see if it all works properly, create this test class:
import org.antlr.runtime.*;
public class ANTLRDemo {
public static void main(String[] args) throws Exception {
ANTLRStringStream in = n...
Is it possible to download an old APK for my app from Google Play?
...ns to my app. Unfortunately, I didn't keep copies of all the old APKs, and now I'd like to test upgrade from the old versions to my new version. Is there any way to download Google's copy of my old versions? The Google Play developer console shows my old APKs, but without a download link. I tried "R...
Using a dispatch_once singleton model in Swift
...ants (and variables), and is thread safe by the definition of let. This is now officially recommended way to instantiate a singleton.
Class constants were introduced in Swift 1.2. If you need to support an earlier version of Swift, use the nested struct approach below or a global constant.
Nested ...
Xcode Debugger: view value of variable
...a by clicking the upper-right corner button showed in the screenshot.
Now set a Breakpoint – the line in your code where you want your program to pause, by clicking the border of your Code Area.
Now in the Debug Area look for this buttons and click the one in the middle. You will notice yo...
Generating random whole numbers in JavaScript in a specific range?
... have an interval like this:
[0 .................................... 1)
Now, we'd like a number between min (inclusive) and max (exclusive):
[0 .................................... 1)
[min .................................. max)
We can use the Math.random to get the correspondent in the [min, ...
How can I rename a project folder from within Visual Studio?
...ove the project from the solution, by right clicking and selecting Remove.
Now, in Windows Explorer, rename the project folder.
Go back to Visual Studio, and in Solution Explorer, right click the solution and choose Add -> Existing project. Select the project file for the project you removed in s...
Set cache-control for entire S3 bucket automatically (using bucket policies?)
... existing and future files and was hoping to do it in a bucket policy.
I know I can edit the existing ones and I know how to specify them on put if I upload them myself but unfortunately the app that uploads them cannot set the headers as it uses s3fs to copy the files there.
...
In the shell, what does “ 2>&1 ” mean?
...file
Mon Jan 7 13:18:21 CET 2013
The file is overwritten each time, well now:
$ set -o noclobber
$ date > $testfile ; cat $testfile
bash: /tmp/testNoClobberDate-WW1xi9: cannot overwrite existing file
Mon Jan 7 13:18:21 CET 2013
$ date > $testfile ; cat $testfile
bash: /tmp/testNoClobberDa...
Understanding how recursive functions work
...hose individually and when you are done you add the totals together.. Well now if each of you find some friend and split the buckets further, then you just need to wait for these other friends to figure out their totals, bring it back to each of you, you add it up. And so on. The special case is whe...
How does the bitwise complement operator (~ tilde) work?
...
How does the machine know it is getting a two complement negative number instead of a higher positive number? Is it because of the type system of the respective language indicating that the type is a signed int versus unsigned?
...