ISMAP
b = ISMAP (x)
Returns true if x is a MAP variable.
Example
A = {"x":1, "y":2}
print IsMap(A) ' Output 1
A = [1,2,3]
print IsMap(A) ' Output 0 (is an array)
A = 1
print IsMap(A) ' Output 0 (is a number)
A = "abc"
print IsMap(A) ' Output 0 (is a string)