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-2.2.1.180	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.179	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.178	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.177	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.176	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.175	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.174	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.173	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.172	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.171	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.170	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.169	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.167	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.166	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.165	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.164	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.163	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.162	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.161	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.160	tracks/ecmascript/exercises/transpose/example.js