S.I/Lisp/

IFOMITTED

=IFOMITTED(1, 2)
-> 1

=DEFAULT(<omitted_optional>, 2)
-> 2
        

DEFINE(
    IFOMITTED,
    LAMBDA(
        optional_argument,
        value_if_omitted,
        value_if_provided,
        IF(
            ISOMITTED(optional_argument),
            value_if_omitted,
            value_if_provided)))
        

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