Consecutive Run Compression

HardArraysPRO

Practice JavaScript array traversal by compressing consecutive repeated values into value-count pairs. This hard exercise focuses on preserving run order, keeping separated repeats distinct, handling empty input, and summarizing a sequence without mutating the source array.

What you'll practice

Work with JavaScript array traversal by compressing consecutive repeated values into value-count pairs
Preserving run order
Keeping separated repeats distinct
Handling empty input
Summarizing a sequence without mutating the source array

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