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What does `kill -0 $pid` in a shell script do?
Basically, what signal does '0' represent, because here I see SIGNAL numbers starting from 1.
6 Answers
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When should one use RxJava Observable and when simple Callback on Android?
... I decided to try out Square's Retrofit . I see that they support simple Callback
9 Answers
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Jquery live() vs delegate() [duplicate]
... be better to use now since we can add the event context. Since delegate() calls live() internally. So I think 1 call less. Or am I wrong?
– PeeHaa
May 16 '11 at 17:55
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Call a stored procedure with parameter in c#
... do a delete, insert and update in my program and I try to do an insert by call a created stored procedure from my database.
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How do you delete an ActiveRecord object?
...lete and delete_all which won't enforce :before_destroy and :after_destroy callbacks or any dependent association options.
User.delete_all(condition: 'value') will allow you to delete records
without a primary key
Note: from @hammady's comment, user.destroy won't work if User model has no pr...
Set selected item of spinner programmatically
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calling SetSelection() just after setAdapter() seem to display the 1st item always (Android 2.3), even the good one is selected in the dropView. adding view.post() (@Marco Hernaiz Cao answer) fix it for me.
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Why switch is faster than if
...ments that will try to place the hottest branch first in the code. This is called "Branch Prediction". For more information on this, see here: https://dzone.com/articles/branch-prediction-in-java
Your experiences may vary. I don't know that the JVM doesn't run a similar optimization on LookupSwitch...
Android onCreate or onStartCommand for starting service
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onCreate() is called when the Service object is instantiated (ie: when the service is created). You should do things in this method that you need to do only once (ie: initialize some variables, etc.). onCreate() will only ever be called on...
What is the relationship between UIView's setNeedsLayout, layoutIfNeeded and layoutSubviews?
...iew that marks it as needing layout. That will force layoutSubviews to be called on the view before the next redraw happens. Note that in many cases you don't need to call this explicitly, because of the autoresizesSubviews property. If that's set (which it is by default) then any change to a vie...
How to strip all non-alphabetic characters from string in SQL Server?
... Stuff(@Temp, PatIndex(@KeepValues, @Temp), 1, '')
Return @Temp
End
Call it like this:
Select dbo.RemoveNonAlphaCharacters('abc1234def5678ghi90jkl')
Once you understand the code, you should see that it is relatively simple to change it to remove other characters, too. You could even make ...