27 lines
619 B
Plaintext
27 lines
619 B
Plaintext
fun main(args: Array<String>) {
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// map definition:
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val map = mapOf("foo" to 5,
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"bar" to 10,
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"baz" to 15,
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"foo" to 6)
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// retrieval:
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println(map["foo"]) // => 6
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println(map["invalid"]) // => null
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// check keys:
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println("foo" in map) // => true
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println("invalid" in map) // => false
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// iterate over keys:
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for (k in map.keys) print("$k ")
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println()
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// iterate over values:
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for (v in map.values) print("$v ")
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println()
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// iterate over key, value pairs:
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for ((k, v) in map) println("$k => $v")
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}
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