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R - Concatenate two dataframes?
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If you're getting the union of more than 2 data frames, you can use Reduce(rbind, list_of_data_frames) to mash them all together!
– Yourpalal
Aug 13 '15 at 21:12
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Iterating through a Collection, avoiding ConcurrentModificationException when removing objects in a
We all know you can't do the following because of ConcurrentModificationException :
26 Answers
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How to remove part of a string? [closed]
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If you're specifically targetting "11223344", then use str_replace:
// str_replace($search, $replace, $subject)
echo str_replace("11223344", "","REGISTER 11223344 here");
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Get names of all keys in the collection
...ooks related to the history mechanism because I get things which I have modified in the past..
– Shawn
Sep 26 '11 at 2:54
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Is it Pythonic to use list comprehensions for just side effects?
...way (I have been known to use a genex in the for before, to get rid of the if).
– Ignacio Vazquez-Abrams
Apr 22 '11 at 8:34
6
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val() doesn't trigger change() in jQuery [duplicate]
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Only if they were changing the value to something that would fail their own validation, which would be silly.
– Leng
Jun 5 '13 at 17:21
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Easy way to turn JavaScript array into comma-separated list?
... to iterate through the array and build the string myself by concatenation if that's the only way.)
17 Answers
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Check for current Node Version
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process.version.match(/^v(\d+\.\d+)/)[1]
if process.version is 'v0.11.5', then get 0.11 .
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Running multiple commands in one line in shell
...ou are looking for is && operator to execute the next command only if the previous one succeeded:
cp /templates/apple /templates/used && cp /templates/apple /templates/inuse && rm /templates/apple
Or
cp /templates/apple /templates/used && mv /templates/apple /tem...
What is the difference between “screen” and “only screen” in media queries?
What is the difference between screen and only screen in media queries?
5 Answers
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