# Unit tests for array slices and index function
#------------------------------------------------
# The built-in function index(Array, value) searches through
# Array to find an entry that matches value.
# It returns the index of that entry.

array A = [1, 2, 3.0, 4.0, "five", "six", 7*I, {8,8}, NaN]
array B = A[2:4]

do for [ i = 1:|A| ] {
    x = A[i]
    k = index(A,x)
    if (k > 0) {
	print "A[", k, "] = ", A[i], "\t", "A[",i,":6] = ", A[i:6]
    } else {
	print "no member of A matches ", x
    }
}
print "array B = ", B

# Use of index to establish key/value pairs
print "\nKey/value pairs\n"
array key = [ "sky", "water", "dirt", "fire" ]
array value = [ "blue", "blue", "brown", "red" ]

water_value = value[index(key, "water")]
dirt_value = value[index(key, "dirt")]
sky = "sky"
sky_value = value[index(key, sky)]

print "water is ", water_value
print "dirt is ", dirt_value
print "sky is ", sky_value