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Add kotlin code block for chapter_hashing (#1195)
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@ -346,7 +346,29 @@ $$
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=== "Kotlin"
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```kotlin title="built_in_hash.kt"
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val num = 3
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val hashNum = num.hashCode()
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// 整数 3 的哈希值为 3
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val bol = true
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val hashBol = bol.hashCode()
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// 布尔量 true 的哈希值为 1231
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val dec = 3.14159
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val hashDec = dec.hashCode()
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// 小数 3.14159 的哈希值为 -1340954729
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val str = "Hello 算法"
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val hashStr = str.hashCode()
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// 字符串“Hello 算法”的哈希值为 -727081396
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val arr = arrayOf<Any>(12836, "小哈")
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val hashTup = arr.hashCode()
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// 数组 [12836, 小哈] 的哈希值为 189568618
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val obj = ListNode(0)
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val hashObj = obj.hashCode()
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// 节点对象 utils.ListNode@1d81eb93 的哈希值为 495053715
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```
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=== "Zig"
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