对象结果转换为另一个对象 JavaScript

Question

如何将以下对象转换为以下输出JavaScript？目前我有以下对象。你能建议我吗？

[
    {
        "attrTitle": "color",
        "attrValue": "Green"
    },
    {
        "attrTitle": "size",
        "attrValue": "M"
    },
    {
        "attrTitle": "size",
        "attrValue": "L"
    },
    {
        "attrTitle": "size",
        "attrValue": "S"
    },
    {
        "attrTitle": "color",
        "attrValue": "Red"
    }
]

我期望的输出如下

[
    {
        "attrTitle": "color",
        "attrValue": ["Red", "Green"]
    },
    {
        "attrTitle": "size",
        "attrValue": ["S","L","M"]
    }
]

Answer 1

const input = [ ... ];

const output = input.reduce((acc, curr) => {
    const existingAttr = acc.find(attr => attr.attrTitle === curr.attrTitle);
    if (existingAttr) {
        existingAttr.attrValue.push(curr.attrValue);
    } else {
        acc.push({
            attrTitle: curr.attrTitle,
            attrValue: [curr.attrValue]
        });
    }
    return acc;
}, []);