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Finding ALL duplicate rows, including “elements with smaller subscripts”
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duplicated has a fromLast argument. The "Example" section of ?duplicated shows you how to use...
Can hash tables really be O(1)?
It seems to be common knowledge that hash tables can achieve O(1), but that has never made sense to me. Can someone please explain it? Here are two situations that come to mind:
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'Must Override a Superclass Method' Errors after importing a project into Eclipse
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How to extract the decision rules from scikit-learn decision-tree?
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Replacement for “rename” in dplyr
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dplyr version 0.3 added a new rename() function that works just like plyr::rename().
df <-...
Changing the “tick frequency” on x or y axis in matplotlib?
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In a javascript array, how do I get the last 5 elements, excluding the first element?
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You can call:
arr.slice(Math.max(arr.length - 5, 1))
If you don't want to exclude the first element, use
arr.slice(Math.max(arr.length - 5, 0))
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How can I change Mac OS's default Java VM returned from /usr/libexec/java_home
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How to iterate over arguments in a Bash script
...hat I'd like to make a shell/bash script of. I can write it in terms of $1 easily:
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