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Check if application is on its first run [duplicate]
...e user cleared the shared preferences)
} else if (currentVersionCode > savedVersionCode) {
// TODO This is an upgrade
}
// Update the shared preferences with the current version code
prefs.edit().putInt(PREF_VERSION_CODE_KEY, currentVersionCode).apply();
}
You would p...
How to develop or migrate apps for iPhone 5 screen resolution?
...he name "Default-568h@2x.png"
In the iOS Simulator, go to the Hardware -> Device menu, and select "iPhone (Retina 4-inch)"
Create other images, e.g. background images
Detect iPhone 5 to load your new images:
public static bool IsTall
{
get {
return UIDevice.currentDevice.userInt...
How to get the current branch name in Git?
...
git rev-parse --abbrev-ref HEAD 2>/dev/null The /dev/null part prevents you from seeing an error if you just created a new repository that has not yet HEAD.
– Paradiesstaub
Jun 14 '13 at 14:57
...
SQL JOIN vs IN performance?
...
>>IN and JOIN are different queries that can yield different results. Can you please explain why would it generate different result in this case even if b.col is not unique?
– Abhijeet
...
Tips for a successful AppStore submission? [closed]
...ep 4 '08 at 15:22
Stephen DarlingtonStephen Darlington
48.8k1111 gold badges101101 silver badges147147 bronze badges
...
twig: IF with multiple conditions
...clearly although this isn't technically a requirement.
{%if ( fields | length > 0 ) or ( trans_fields | length > 0 ) %}
Expressions
Expressions can be used in {% blocks %} and ${ expressions }.
Operator Description
== Does the left expression equal the right expression?
+ ...
puts vs logger in rails rake tasks
...ask to get this to work.
desc "switch logger to stdout"
task :to_stdout => [:environment] do
Rails.logger = Logger.new(STDOUT)
end
This way when you execute your rake task you can add to_stdout first to get stdout log messages or don't include it to have messages sent to the default log file...
MySQL order by before group by
... GROUP BY name
HAVING COUNT(DISTINCT flower)>1);
If you need to extract all the flowers that are the only flowers in the garder instead, you could just change the HAVING condition to HAVING COUNT(DISTINCT flower)=1, but MySql also allows you to use this:
SELECT ...
How to check that a string is a palindrome using regular expressions?
...on that accepts all palindromes that are smaller than some finite fixed length. If there is ever a real-world application that requires identifying palindromes then it will almost certainly not include arbitrarily long ones, thus this answer would show that you can differentiate theoretical impossib...
Compute a confidence interval from sample data
... I like it because you can just add *ss.t._ppf((1+conf)/2.,n-1) to the built-in pandas dataframe .sem method so you don't have to worry about apply
– TNT
Oct 28 '16 at 6:46
...