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// retoor <retoor@molodetz.nl>
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import "dataset" for Dataset
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var ds = Dataset.memory()
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var users = ds["users"]
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var u1 = users.insert({"name": "Alice"})
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System.print(users.columns.containsKey("name")) // expect: true
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System.print(users.columns.containsKey("email")) // expect: false
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var u2 = users.insert({"name": "Bob", "email": "bob@example.com"})
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System.print(users.columns.containsKey("email")) // expect: true
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var u3 = users.insert({"name": "Charlie", "age": 30, "score": 95.5})
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System.print(users.columns.containsKey("age")) // expect: true
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System.print(users.columns.containsKey("score")) // expect: true
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var alice = users.findOne({"name": "Alice"})
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System.print(alice["email"] == null) // expect: true
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users.update({"uid": u1["uid"], "email": "alice@example.com", "verified": true})
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var aliceUpdated = users.findOne({"name": "Alice"})
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System.print(aliceUpdated["email"]) // expect: alice@example.com
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System.print(users.columns.containsKey("verified")) // expect: true
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System.print(users.count()) // expect: 3
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ds.close()
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