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      Uber

      Empresa engajada

      Entrevista do cargo de Software Engineer da empresa Uber

      Pergunta de entrevista da empresa Uber

      Entrevista para Software Engineer

      Why do you choose Uber? input a list of array [[1, 2, 3], [1], [1, 2]] return the list of array, each array is a combination of one element in each array. [[1, 1, 1], [1, 1, 2], [2, 1, 1], [2, 1, 2], [3, 1, 1], [3, 1, 2]] Followup: each array in the input list is an iterator, which can only be looped once.

      Respostas da entrevista

      Sigiloso

      26 de ago. de 2016

      >>> import itertools >>> input = [[1, 2, 3], [1], [1, 2]] >>> print [each for each in itertools.product(*input)]

      1

      Sigiloso

      5 de fev. de 2018

      const combinations = (m) => { let res = []; backtrack(m, 0, [], res); return res; }; const backtrack = (m, s, curr, res) => { if (m.length === curr.length) { res.push(curr.slice()); return res; } for (let i = s; i < m.length; i++) { let row = m[i]; for (let el of row) { curr.push(el); backtrack(m, i + 1, curr, res); curr.pop(); } } }; console.log(combinations([[1],[2,3,4],[5]])); console.log(combinations([[1,2],[3,4]])); console.log(combinations([[1, 2, 3], [1], [1, 2]]));

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