{"id":"merge-nums-aliases-unmatched","text":"For IDs appearing in only one input, `merge_nums` appends a reference to the original `[id, value]` sublist rather than a copy — callers mutating the output can inadvertently modify the input.","truth_value":"IN","source":"entries/2026/06/06/merge-two-2d-arrays-by-summing-values-solution.md","source_url":"","source_hash":"","justifications":[],"dependents":[],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"merge-nums-aliases-unmatched","truth_value":"IN","reason":"premise"}]}}