Contents

function trimTrailingUndefined(array) {
  const trailingUndefinedCount = [...array].reverse().findIndex(x => x !== undefined);
  return array.slice(0, array.length - trailingUndefinedCount);
}

export default function transpose(input) {
  const maxCol = Math.max(0, ...(input.map(row => row.length)));
  return [...Array(maxCol).keys()].map(col =>
    trimTrailingUndefined(input.map((_v, row) => input[row][col]))
      .map(charOrUndefined => charOrUndefined || ' ')
      .join(''));
}

Version data entries

117 entries across 117 versions & 1 rubygems

Version	Path
trackler-2.2.1.98	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.97	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.96	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.95	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.94	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.93	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.92	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.91	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.90	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.89	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.88	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.87	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.86	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.85	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.84	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.83	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.82	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.81	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.80	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.79	tracks/ecmascript/exercises/transpose/example.js