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@joshwcomeau
Created July 1, 2016 21:22
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const reverse = array => [...array].reverse();
const compose = (a, b) => x => a(b(x));
const flipMatrix = matrix => (
matrix[0].map((column, index) => (
matrix.map(row => row[index])
))
);
const rotateMatrix = compose(flipMatrix, reverse);
const flipMatrixCounterClockwise = compose(reverse, rotateMatrix);
const rotateMatrixCounterClockwise = compose(reverse, flipMatrix);
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