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Does the ternary operator exist in R?
...n" "Feb" "Mar" "Apr" "May" "Jun" "Jul" "Aug" "Sep" "Oct" "Nov" "Dec"
# or, more generally
condition %?% value1 %:% value2
It actually works if you define the operators without the % signs, so you could have
`?` <- function(x, y) if(x) y[[1]] else y[[2]]
`:` <- function(y, z) list(y, z)
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The role of #ifdef and #ifndef
... printf("one is not defined ");
#endif
since that specifies the intent more clearly in this particular situation.
In your particular case, the text after the ifdef is not removed since one is defined. The text after the ifndef is removed for the same reason. There will need to be two closing en...
emacs zoom in/zoom out
...The [C-wheel-up] event also worked for me. However, I found [C-S-wheel-up] more prudent as it's not already assigned by default.
– rm -rf
Jun 27 '19 at 17:51
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What is the difference between Directory.EnumerateFiles vs Directory.GetFiles?
...hen you are working with many files and directories, EnumerateFiles can be more efficient.
So basically, EnumerateFiles returns an IEnumerable which can be lazily evaluated somewhat, whereas GetFiles returns a string[] which has to be fully populated before it can return.
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