有没有一种简单的方法可以按范围对js数组值进行分组? [英] Is there a simple way to group js array values by range?

问题描述

如果我有一个如下所示的js数组，是否有一种简单的方法可以按范围对数组值进行重新分组，逻辑基于范围步长，范围步长为1，所以如果数组值连续增加减1，则应写为"1-3"，否则应该折成另一组，非常感谢！

if I have a js array like below, is there a simple way to re-group the array values by range, the logic is based on the range step, the range step is 1, so if the array values are continuous increased by 1, then it should be write like "1-3", otherwise it should be break to another group, thanks a lot!

var list = ["1", "2", "3", "5", "6", "9", "12", "13", "14", "15", "16"]

function(list) {

    // * some function here //

    return ["1-3", "5-6", "9", "12-16"]
}

推荐答案

您可以使用

You could use Array#reduce for it.

var array = ["1", "2", "3", "5", "6", "9", "12", "13", "14", "15", "16"],
    result = array.reduce(function (r, a, i, aa) {
        r.push(!i || aa[i - 1] - a + 1 ? a : r.pop().split('-')[0] + '-' + a);
        return r;
    }, []);

console.log(result);

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

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