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-2.2.1.159	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.158	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.157	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.156	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.155	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.154	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.153	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.152	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.151	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.150	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.149	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.148	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.147	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.146	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.145	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.144	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.143	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.142	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.141	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.140	tracks/ecmascript/exercises/transpose/example.js