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-2.2.1.78	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.77	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.76	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.75	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.74	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.73	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.72	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.71	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.70	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.69	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.68	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.67	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.66	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.65	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.64	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.63	tracks/ecmascript/exercises/transpose/example.js
trackler-2.2.1.62	tracks/ecmascript/exercises/transpose/example.js