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main.js
run
preview
console
function extractMatrixColumn(matrix, column) {
// write code here.
const reducedArr = (acc, current) => {
acc.push(current[column]);
// console.log(acc)
return acc;
}

return matrix.reduce(reducedArr, []);
}



/**
* Test Suite
*/
describe('extractMatrixColumn()', () => {
it('returns largest positive integer possible for digit count', () => {
// arrange
const matrix = [[1, 1, 1, 2], [0, 5, 0, 4], [2, 1, 3, 6]];
const column = 2;

// act
const result = extractMatrixColumn(matrix, column);

// log
console.log("result: ", result);

// assert
expect(result).toEqual([1, 0, 3]);
});
});
Console
"result: "
,
[
1
,
0
,
3
]
,
/index.html
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