HELP SETFRONTLIST

    setfrontlist(item, list) -> list

If item is not already in the list, this is equivalent to

    item :: list

Otherwise them item is removed from wherever it is in the list and made the
first element instead. The same list links are used as before.

See also
    HELP *LISTS - overview of list processing documentation
    REF  *LISTS - details of lists and list processing facilities

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