javascript - 将两个数组与范围组合

Question

我正在尝试合并两个数组。这些数组中的每一个都有定义范围的子数组。我想将它结合起来，以便创建的新数组反射(reflect)基于两个数组中的值的新范围。示例:

//I would like to create a new array based on the ranges in a and b.
var a = [[0, 20], [20, 40], [40, 70]];
var b = [[10, 25], [25, 35]]

//The result reflects the new ranges based on values in both the arrays.
var result = [[0, 10], [10, 20], [20, 25], [25, 35], [35, 40], [40, 70]]

Answer 1

您可以收集一个对象中的所有值，对其进行排序并从中构建元组。

var a = [[0, 20], [20, 40], [40, 70]],
    b = [[10, 25], [25, 35]],
    values = Object.create(null),
    result = [];

a.concat(b).forEach(function (a) {
    values[a[0]] = true;
    values[a[1]] = true;
});

Object
    .keys(values)
    .map(Number)
    .sort(function (a, b) {
        return a - b;
    })
    .reduce(function (a, b) {
        result.push([a, b]);
        return b;
    });

console.log(result);

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