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javascriptLogic errorMedium

Grouping keeps only the last match

Time: 0:00

What it should do

groupByLength(words) should group words by their length, so ["ab","cd","x"] gives {"1":["x"],"2":["ab","cd"]}.

What goes wrong

Each group only ever holds one word — ["ab","cd"] gives {"2":["cd"]}, losing "ab".

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Hints

This is a logic errors bug

The wrong operator, an inverted condition, a formula the right way round but backwards.

Learn the logic errors pattern

Grouping keeps only the last match — JavaScript debugging challenge | BugHunt