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-2.2.1.119	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.118	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.117	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.116	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.115	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.114	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.113	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.111	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.110	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.109	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.108	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.107	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.106	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.105	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.104	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.103	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.102	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.101	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.100	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.99	tracks/ecmascript/exercises/transpose/example.js