At each position of the input vectors, iterates through in order and returns the first non-NA value. This is a robust replacement of the common
ifelse(!is.na(x), x, ifelse(!is.na(y), y, z)). It's more readable and handles problems like
ifelse's inability to work with dates in this way.
the input vectors. Order matters: these are searched and prioritized in the order they are supplied.
what value should be used when all of the vectors return
Returns a single vector with the selected values.
Deprecated, do not use in new code. Use
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