Understanding issorted's lt keyword

New to Julia
85

To get the desired behaviour:

using IterTools.partition
isinorder(x; order=<=) = all(t->order(t...), partition(x, 2, 1))

isinorder([1, 1, 2]) == true
isinorder([2, 1, 1]) == false
isinorder([1, 1, 2]; order=<) == false
isinorder ([1, 1, 2]; order=x->true) == true