Created
December 5, 2017 01:33
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Groups adjacent elements of an array that satisfy an equality function.
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| /* @flow */ | |
| function groupByAdjacent<T>(arr: Array<T>, eq: (T, T) => boolean): Array<Array<T>> { | |
| return arr.reduce((prev, curr) => { | |
| if (prev.length && eq(curr, prev[prev.length - 1][0])) { | |
| prev[prev.length - 1].push(curr); | |
| } else { | |
| prev.push([curr]); | |
| } | |
| return prev; | |
| }, []); | |
| } |
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