问Javascript将数组项与其他数组中的每个项合并为文本

EN

function makeLabels (arr) {
  return arr.reduce((result, el) => {
    var first = el[0];
    var list = el[1];
    var newResult = [];
    if (result.length < 1) {
      list.forEach((val) => {
        newResult.push(first+"_"+val);
      });
    } else {
      result.forEach((r) => {
      
        list.forEach((val) => {
          newResult.push(r+"_"+first+"_"+val);
        });
      });
    }
    return newResult;
  }, []);
}

var properties =
  [ ["Color", ["red", "blue"]]
  , ["Size", ["small", "medium", "large"]]
  , ["Model", ["modern", "old"]] ];
  
console.log( makeLabels(properties) );

const
    cartesian = (a, b) => a.reduce((r, v) => r.concat(b.map(w => [].concat(v, w))), []),
    data = [["Color", ["red", "blue"]], ["Size", ["small", "medium", "large"]], ["Model", ["modern", "old"]]],
    keys = data.map(([key]) => key),
    result = data
        .map(([, values]) => values)
        .reduce(cartesian)
        .map(a => a.map((v, i) => [keys[i], v].join('_')).join('_'));

console.log(result);

.as-console-wrapper { max-height: 100% !important; top: 0; }