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The Concept of 'Hold space' and 'Pattern space' in sed
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edited Oct 11 '12 at 8:01
answered Oct 11 '12 at 7:30
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Jackson JSON custom serialization for certain fields
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answered Aug 21 '12 at 0:25
Kevin BowersoxKevin Bowersox
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Check difference in seconds between two times
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267
Assuming dateTime1 and dateTime2 are DateTime values:
var diffInSeconds = (dateTime1 - dateTi...
How can I turn off Visual Studio 2013 Preview?
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211
From the menu go to Tools -> Options then navigate to Environment -> Tabs and Windows an...
How does the C# compiler detect COM types?
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edited May 23 '17 at 12:18
Community♦
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answered Jul 7 '09 at 17:22
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Does the ternary operator exist in R?
... if-else is equivalent to ?:.
> a <- 1
> x <- if(a==1) 1 else 2
> x
[1] 1
> x <- if(a==2) 1 else 2
> x
[1] 2
The power of R is vectorization. The vectorization of the ternary operator is ifelse:
> a <- c(1, 2, 1)
> x <- ifelse(a==1, 1, 2)
> x
[1] 1 2 1
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Convert NSNumber to int in Objective-C
I use [NSNumber numberWithInt:42] or @(42) to convert an int to NSNumber before adding it to an NSDictionary:
5 Answers...
What is `params.require(:person).permit(:name, :age)` doing in Rails 4?
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2 Answers
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How to add a changed file to an older (not last) commit in Git
...ill rewrite the rest of your commits against the new one.
Repeat from step 2 onwards if you have marked more than one commit for edit.
[^vimnote]: If you are using vim then you will have to hit the Insert key to edit, then Esc and type in :wq to save the file, quit the editor, and apply the change...
How to raise a ValueError?
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answered Dec 8 '10 at 23:10
NPENPE
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