54 lines
1.2 KiB
Standard ML
Executable file
54 lines
1.2 KiB
Standard ML
Executable file
#!/usr/bin/env fun
|
|
|
|
/*
|
|
* This file is part of the Fun programming language.
|
|
* https://fun-lang.xyz/
|
|
*
|
|
* Copyright 2026 Johannes Findeisen
|
|
* Licensed under the terms of the Apache-2.0 license.
|
|
* https://opensource.org/license/apache-2-0
|
|
*
|
|
* Added: 2026-03-25
|
|
*/
|
|
|
|
/*
|
|
* Iterating through maps in Fun
|
|
*
|
|
* This example shows common patterns to iterate over a map:
|
|
* - for k in keys(m): access value via m[k]
|
|
* - for v in values(m): iterate values directly
|
|
* - Notes about non-deterministic key order unless you define one
|
|
*/
|
|
|
|
// Define a sample map
|
|
user = { "name": "Ada", "age": 37, "city": "London" }
|
|
|
|
print("-- Iterate keys, then index map --")
|
|
for k in keys(user)
|
|
print(k + ": " + to_string(user[k]))
|
|
|
|
print("-- Iterate values only --")
|
|
for v in values(user)
|
|
print(v)
|
|
|
|
// If you need a specific order, provide it explicitly
|
|
order = ["name", "city", "age"]
|
|
print("-- Deterministic order by explicit key list --")
|
|
for k in order
|
|
if has(user, k)
|
|
print(k + ": " + to_string(user[k]))
|
|
|
|
/* Expected output (key order in the first two blocks may vary):
|
|
-- Iterate keys, then index map --
|
|
name: Ada
|
|
age: 37
|
|
city: London
|
|
-- Iterate values only --
|
|
Ada
|
|
37
|
|
London
|
|
-- Deterministic order by explicit key list --
|
|
name: Ada
|
|
city: London
|
|
age: 37
|
|
*/
|