62 lines
1.4 KiB
Standard ML
Executable file
62 lines
1.4 KiB
Standard ML
Executable file
#!/usr/bin/env fun
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/*
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* This file is part of the Fun programming language.
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* https://fun-lang.xyz/
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*
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* Copyright 2026 Johannes Findeisen <you@hanez.org>
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* Licensed under the terms of the Apache-2.0 license.
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* https://opensource.org/license/apache-2-0
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*
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* Added: 2026-01-19
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*/
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/*
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* Maps datatype — focused examples
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*
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* This script exclusively demonstrates the built-in maps datatype:
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* - Creating maps with literals and empty maps
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* - Reading and writing entries via [key]
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* - Checking for key existence with has(map, key)
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* - Getting keys(map) and values(map)
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* - Using nested maps
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*/
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// Create an empty map and add entries
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user = {}
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user["name"] = "Ada"
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user["age"] = 37
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print(user) // -> {"name": "Ada", "age": 37}
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// Read an entry by key
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print(user["name"]) // -> Ada
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// Update an existing entry
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user["age"] = 38
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print(user["age"]) // -> 38
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// Check if a key exists
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print(has(user, "age")) // -> 1 (true)
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print(has(user, "email")) // -> 0 (false)
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// Keys and values (order may vary)
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print(keys(user)) // -> [name, age]
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print(values(user)) // -> ["Ada", 38]
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// Nested maps
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address = { "city": "London", "zip": "E1" }
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user["address"] = address
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print(user["address"]) // -> {"city": "London", "zip": "E1"}
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print(user["address"]["city"]) // -> London
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/* Expected output:
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{"name": Ada, "age": 37}
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Ada
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38
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1
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0
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[name, age]
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[Ada, 38]
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{"zip": E1, "city": London}
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London
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*/
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