REDCap's API frequently specifies a series of values separated by commas. In the R world, it's easier to keep these values as separate elements in a vector. This functions squashes them together in a single character element (presumably right before the return value is passed to the API)
collapse_vector(elements)A single character element, where the values are separated by
commas. Can be blank. (i.e., "").
An array of values. Can be NULL. Required.
Will Beasley
library(REDCapR) # Load the package into the current R session.
REDCapR:::collapse_vector(elements = NULL )
REDCapR:::collapse_vector(elements = letters)
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