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Accepted
Marina
Asked:2020-01-08 04:39:52 +0000 UTC2020-01-08 04:39:52 +0000 UTC

JS数组元素

  • 772

如何按顺序显示一系列数组元素？

 Чтобы из такого:      35,3,6,9,11,12,13,14,15,39,9,21,25,26,27
 На выходе было такое: 35,3,6,9,11-15,39,9,21,25-27
javascript

2 个回答

  1. Best Answer

    压入字符串数组

    var data = [35, 3, 6, 9, 11, 12, 13, 14, 15, 39, 9, 21, 25, 26, 27];
var res = [];
var start = 0;
var stop = start;
for (var i = 1; i < data.length; i++) {
  if (data[i] == data[i - 1] + 1)
    stop = i;
  else {
    if (start == stop)
      res.push(data[start]);
    else
      res.push(data[start] + '-' + data[stop]);
    start = i;
    stop = start;
  }
}

if (start == stop)
  res.push(data[start]);
else
  res.push(data[start] + '-' + data[stop]);
  
console.log(res);

    • 5

  2. 选项...

    function fn(f) {
  var c = void 0;
  return f.reduce(function(e, d, a, b) {
    a = d + 1 == b[++a];
    b = void 0 === c;
    a && b ? c = d : a || b ? !a && b && e.push(d) : (e.push(c + "-" + d), c = void 0);
    return e;
  }, []);
};
var data = [35, 3, 6, 9, 11, 12, 13, 14, 15, 39, 9, 21, 25, 26, 27];
console.log(fn(data))

    • 1

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