30 lines
823 B
Standard ML
30 lines
823 B
Standard ML
// for-in over an array literal
|
|
for x in [1, 2, 3]
|
|
print(x) // prints: 1, then 2, then 3
|
|
|
|
// for-in over a named array
|
|
arr = [10, 20, 30]
|
|
for x in arr
|
|
print(x) // prints: 10, then 20, then 30
|
|
|
|
// nested arrays: iterate rows, then elements
|
|
matrix = [[1, 2], [3, 4]]
|
|
for row in matrix
|
|
print(row) // prints: [1, 2] then [3, 4]
|
|
for v in row
|
|
print(v) // prints: 1, 2, 3, 4
|
|
|
|
// iterate over an array expression (concatenation)
|
|
for v in arr + [40, 50]
|
|
print(v) // prints: 10, 20, 30, 40, 50
|
|
|
|
// iterate over a slice (end = -1 means till the end)
|
|
for v in arr[1:-1]
|
|
print(v) // prints: 20, 30
|
|
|
|
// iterate over a function result
|
|
fun make()
|
|
return [7, 9, 11]
|
|
|
|
for v in make()
|
|
print(v) // prints: 7, 9, 11
|