
mlr put $n = length($x)
x=1,y=abcdefg,z=3,n=1

mlr put $n = length($y)
x=1,y=abcdefg,z=3,n=1

mlr put $n = length($nonesuch)
x=1,y=abcdefg,z=3,n=0

mlr put $n = length($*)
x=1,y=abcdefg,z=3,n=3

mlr put $n = length([])
x=1,y=abcdefg,z=3,n=0

mlr put $n = length([5,6,7])
x=1,y=abcdefg,z=3,n=3

mlr put $n = length({})
x=1,y=abcdefg,z=3,n=0

mlr put $n = length({"a":5,"b":6,"c":7})
x=1,y=abcdefg,z=3,n=3

