array_index: Find the numerical indices in an array.
In LAJordanger/leanRcoding: Leaner R Coding

This function will identify the numerical indices that corresponds to a selection based on a character vector, by comparing it to a list representing the dimension-names to be used.

1	array_index(.bookmark, .dimnames, .check_dimnames = TRUE)

`.bookmark`	The caracter vector to be used for the selection. (If a list is detected, it will be converted to a vector first.) This vector must have the same length as the list in the `.dimnames`-argument. If `.bookmark` is a named vector, then the names must be the same as those encountered in `.dimnames` (but not necessarily in the same order).
`.dimnames`	The list of dimension names. It will be assumed that this is a named list of character vectors, and it will also be assumed that the names (and the content of the individual character vectors) are unique. A test of the validity of `.dimnames` will be performed when `.check_dimnames` is given as `TRUE` (default).
`.check_dimnames`	A logical value, default `TRUE`, that can be used to check that `.dimnames` satisfies the required uniqueness requirements.