将数组拆分为匹配值的数组

问题描述

我有一个类似于以下值的数组:

I have an array of values similar to:

["100", "330", "22", "100", "4.7", "0.01", "0.01", "330", "0.01", "100", "47", "22", "100", "0.01"]

使用JavaScript，我想将此数组拆分为多个数组，其中只有匹配的字符串在这些数组中，如下所示:

Using JavaScript I would like to split this array into a number of arrays where only matching strings are in those arrays like this:

["100", "100", "100"]
["330", "330"]
["22", "22"]
["0.01", "0.01", "0.01", "0.01"]
["47"]
["4.7"]

任何对此的帮助将不胜感激！谢谢！

Any help with this would be much appreciated! Thanks!

推荐答案

您可以使用 Map 并获取值作为结果.

You could collect with a Map and get the values as result.

由内而外:

• 使用 Array#reduce 和 data ，并使用 Map 实例作为 initialValue .

• 作为回调，请使用 Map#set 并收集每个组的值.

• Use Array#reduce with data and use a Map instance as initialValue.

• As callback take Map#set and collect the values for each group.

其他方法:

• 扩展语法 ... 用于将所有可迭代项与
一起使用
• 逻辑或 || 表示具有默认的传播值.

从地图中获取值并将其用作参数

Get the values from the map and use it as parameter for

var data = ["100", "330", "22", "100", "4.7", "0.01", "0.01", "330", "0.01", "100", "47", "22", "100", "0.01"],
    result = Array.from(data
        .reduce((m, v) => m.set(v, [...(m.get(v) || []), v]), new Map)
        .values()
    );

console.log(result);

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

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