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How can two strings be concatenated?
...of the vector to be collapsed.
You can even combine both:
> paste(x, "and some more", sep="|-|", collapse="--")
[1] "Hello|-|and some more--World|-|and some more"
Hope this helps.
share
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imp...
How do I log a Python error with debug information?
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Correct me if I'm wrong, in this case, there is no real handling of the exception and therefore it make sense to add raise at the end of the except scope. Otherwise, running will continue as if everything was fine.
– Dror
Nov 9 '18 at 14:36
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How do I remove repeated elements from ArrayList?
I have an ArrayList<String> , and I want to remove repeated strings from it. How can I do this?
38 Answers
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Should I put the Google Analytics JS in the or at the end of ?
Google gives me a piece of javascript and tells me to include it in the <head> .
7 Answers
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Is there a CSS parent selector?
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It would seem that it has already been suggested and rejected: stackoverflow.com/questions/45004/…
– RobM
Oct 27 '10 at 12:22
14
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How do I use reflection to invoke a private method?
There are a group of private methods in my class, and I need to call one dynamically based on an input value. Both the invoking code and the target methods are in the same instance. The code looks like this:
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What does cherry-picking a commit with Git mean?
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Cherry picking in Git means to choose a commit from one branch and apply it onto another.
This is in contrast with other ways such as merge and rebase which normally apply many commits onto another branch.
Make sure you are on the branch you want to apply the commit to.
git checkout...
How do I animate constraint changes?
I'm updating an old app with an AdBannerView and when there is no ad, it slides off screen. When there is an ad it slides on the screen. Basic stuff.
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How to decide when to use Node.js?
...out how good Node.js is. Considering how much I love working with jQuery and JavaScript in general, I can't help but wonder how to decide when to use Node.js. The web application I have in mind is something like Bitly - takes some content, archives it.
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Shell - Write variable contents to a file
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Use the echo command:
var="text to append";
destdir=/some/directory/path/filename
if [ -f "$destdir" ]
then
echo "$var" > "$destdir"
fi
The if tests that $destdir represents a file.
The > appends the text after truncating the ...