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length



    function

    (length ds)

    Returns the length or count of a data structure in constant time as 
    an integer. For structs and tables, returns the number of key-value 
    pairs in the data structure.

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(map length  [  'a  :a  "a"  [97]  @[97]  {0 97}  @{0 97}  ])
# =>        @[  1   1   1    1     1      1       1        ]

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