enumerate for filters

Enumerate the elements in a stream.

Signature

> enumerate {flags}

Input/output types:

inputoutput
anytable

Examples

Add an index to each element of a list

> [a, b, c] | enumerate
╭───┬──────╮
 # │ item │
├───┼──────┤
 0  a    
 1  b    
 2  c    
╰───┴──────╯