如何使用lodash的_.mergewith和customizer函数

Question

您好，我需要合并两个对象与合并在lodash…

object1 = {
    "a": {
        "name": "masoud", "age": 3, "user": "masmas"
    },
    "b" : {
        "name": "milad", "age": 13, "user": "milmil"
    }
}

object2 = {
    "b" : {
        "pythonSkill" : 18 , "HTMLSkill" : 15 
    } , 
    "c" : {
        "phpSkill" : 15 , "CSSSkill" : 16 
    },
    "a" : {
        "javaSkill" : 20 , "reactSkil" : 10 
    } , 
}

最后组合对象样本：

final = {
    "a": {
        "name": "masoud", "age": 3, "user": "masmas", "persianLanguage": 20, "englishLanguage": 10
    },
    "b" : {
        "name": "milad", "age": 13, "user": "milmil" , "pythonSkill": 18, "HTMLSkill": 15
    }
}

每个对象都没有特定数量的内部对象，并且每次都可能不同。有一次Object1有a，b，c，....，m& other time Object1有m，n，o，c，...

Object2类似的object1 ...

不同场景1-如果Object1有"a“，object2有"a”，finally对象必须有"a“..2-如果Object1没有"a“，object2有"a”，则finally对象没有"a“..3-如果Object1有"a“而object2没有"a”，则finally对象没有"a“。

Answer 1

我不知道如何使用_.mergeWith，这对我来说似乎相当困难，但您可以使用_.mapValues和_.pickBy相对容易地实现所需的结果

​

object1 = {
    "a": {
        "name": "masoud", "age": 3, "user": "masmas"
    },
    "b" : {
        "name": "milad", "age": 13, "user": "milmil"
    },
    "d" : {
        "name": "nassim", "age": 32, "user": "nm1"
    }
}

object2 = {
    "b" : {
        "pythonSkill" : 18 , "HTMLSkill" : 15 
    } , 
    "c" : {
        "phpSkill" : 15 , "CSSSkill" : 16 
    },
    "a" : {
        "javaSkill" : 20 , "reactSkil" : 10 
    } , 
}

let final = _.mapValues(_.pickBy(object1, (v,k) => object2[k]), (v, k, o) => { 
    return { ...v, ...object2[k] }
});
console.log(final)

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.20/lodash.min.js" integrity="sha512-90vH1Z83AJY9DmlWa8WkjkV79yfS2n2Oxhsi2dZbIv0nC4E6m5AbH8Nh156kkM7JePmqD6tcZsfad1ueoaovww==" crossorigin="anonymous"></script>

​