22 lines
379 B
ObjectPascal
22 lines
379 B
ObjectPascal
uses MLABC;
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begin
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var text := '''
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id,created_at,name
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1,15.01.2024,Alice
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2,16.01.2024 12:30:00,Bob
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3,15.01.2024,Charlie
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4,16.01.2024 12:30:00,Diana
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''';
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var df := DataFrame.FromCsvText(text);
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var grouped := df.GroupBy('created_at').Count;
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Println('Исходный DataFrame:');
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df.Print;
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Println;
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Println('GroupBy(created_at).Count:');
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grouped.Print;
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end.
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