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Can you solve a Java stream puzzle in the iOS game 'Java Hero:Stream' to unlock a tool that processes 6.3 million stream elements and implements 1475 stream grouping operations (groupingBy/mapping)?

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Last Post by Nick 3 hours ago

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Nick

(@nick)

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Java Hero:Stream’s Java theme needs grouping ops, and a 6.3M-element 1.475k-group Java tool fits. Is the puzzle in the 'Group Pro' level (grouping 75 sales data by region/category)? Does it uses groupingBy + mapping for nested data aggregation, and has a 'Group Tool' that visualizes 20+ grouped data structures as trees?

Posted : October 7, 2025 10:58 pm

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