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How do I run a Ruby file in a Rails environment?
...nvironment', __FILE__)
You can control the environment used (development/test/production) by setting the RAILS_ENV environment variable when running the script.
RAILS_ENV=production ruby script/test.rb
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How do I create a Java string from the contents of a file?
...or the encodings required of all Java runtimes:
String content = readFile("test.txt", StandardCharsets.UTF_8);
The platform default is available from the Charset class itself:
String content = readFile("test.txt", Charset.defaultCharset());
Note: This answer largely replaces my Java 6 version. Th...
Difference between return and exit in Bash functions
...o "We are still here"
exitfunc
echo "We will never see this"
Output
$ ./test.sh
this is retfunc()
We are still here
this is exitfunc()
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follo...
Clear Text Selection with JavaScript
...ocument.selection implies the existence of an empty() method of it. You've tested for the method in every other case, so you might as well test for empty in the final case too.
– Tim Down
Jul 5 '10 at 10:20
...
Warning message: In `…` : invalid factor level, NA generated
...or numeric values)
# (as.vector can be use for objects - not tested)
fixed$Type <- as.character(fixed$Type)
fixed[1, ] <- c("lunch", 100)
# Re-factorize with the as.factor function or simple factor(fixed$Type)
fixed$Type <- as.factor(fixed$Type)
...
Normalizing mousewheel speed across browsers
...120; // IE/Safari/Chrome TODO: /3 for Chrome OS X
};
You can test out this code on your own browser here: http://phrogz.net/JS/wheeldelta.html
Suggestions for detecting and improving the behavior on Firefox and Chrome on OS X are welcome.
Edit: One suggestion from @Tom is to simply c...
Why can't I use switch statement on a String?
...the hash code of the label. The corresponding case is an if statement that tests string equality; if there are collisions on the hash, the test is a cascading if-else-if. The second switch mirrors that in the original source code, but substitutes the case labels with their corresponding positions. T...
How to check command line parameter in “.bat” file?
...
if "%1"=="" goto :done
echo %1
shift
goto :loop
:done
echo Done.
Let's test it:
C:\> argq bla bla
bla
bla
Done.
Seems to work. But now, lets switch to second gear:
C:\> argq "bla bla"
bla""=="" was unexpected at this time.
Boom This didn't evaluate to true, neither did it evaluate to...
Show pending migrations in rails
...ere is an example of the output after having just generated and not run a 'test' migration
rails_project theIV$ rake db:abort_if_pending_migrations
(in /Users/theIV/Sites/rails_project/)
You have 1 pending migrations:
20090828200602 Test
Run "rake db:migrate" to update your database then try agai...
What is the exact meaning of IFS=$'\n'?
...
ANSI C-quoted strings is a key point. Thanks to @mklement0 .
You can test ANSI C-quoted strings with command od.
echo -n $'\n' | od -c
echo -n '\n' | od -c
echo -n $"\n" | od -c
echo -n "\n" | od -c
Outputs:
0000000 \n
0000001
0000000 \ n
0000002
0000000 \ n
0000002
000...