使用 underscore.js 对 javascript 中没有间隙的数字序列进行分组 [英] Grouping a sequence of numbers with no gaps in javascript using underscore.js

问题描述

有一个数字数组[1, 2, 3, 4, 7, 8, 11, 15, 16, 17, 18]，我们如何使用下划线.js.

Having an array of numbers [1, 2, 3, 4, 7, 8, 11, 15, 16, 17, 18], how can we group them in groups of consecutive numbers using underscore.js.

所以期望的输出是 4 组(1-4、7-8、11 和 15-18)[[1, 2, 3, 4], [7, 8], [11], [15, 16, 17, 18]]

So the desired output is 4 groups (1-4, 7-8, 11 and 15-18) [[1, 2, 3, 4], [7, 8], [11], [15, 16, 17, 18]]

推荐答案

我只会用 reduce 来做，而不用担心另一个库.

I would just do it with reduce and not worry about another library.

[1, 2, 3, 4, 7, 8, 11, 15, 16, 17, 18].reduce((arr, val, i, a) => {
  if (!i || val !== a[i - 1] + 1) arr.push([]);
  arr[arr.length - 1].push(val);
  return arr;
}, []);

var result = [1, 2, 3, 4, 7, 8, 11, 15, 16, 17, 18].reduce((arr, val, i, a) => {
  if (!i || val !== a[i - 1] + 1) arr.push([]);
  arr[arr.length - 1].push(val);
  return arr;
}, []);

console.log(result);

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