javascript - 如何在对象数组中查找重复项并调整重复位置的值

Question

我有一个数组对象，其中键的值可以重复自身。还有另一个属性具有该值+常量。我的目标是根据重复中的位置添加一个数字。例如我的数组看起来像这样

[{
    "id": "53990XXXX",
    "components": {
        "CategorySnippet": "snippet-53990XXXX"
    }
}, {
    "id": "56990XXXX",
    "components": {
        "CategorySnippet": "snippet-56990XXXX"
    }
}, {
    "id": "54980XXXX",
    "components": {
        "CategorySnippet": "snippet-54980XXXX"
    }
}, {
    "id": "53990XXXX",
    "components": {
        "CategorySnippet": "snippet-53990XXXX"
    }
}]

我希望它是这样的

[{
        "id": "53990XXXX",
        "components": {
            "CategorySnippet": "snippet-53990XXXX"
        }
    }, {
        "id": "56990XXXX",
        "components": {
            "CategorySnippet": "snippet-56990XXXX"
        }
    }, {
        "id": "54980XXXX",
        "components": {
            "CategorySnippet": "snippet-54980XXXX"
        }
    }, {
        "id": "53990XXXX",
        "components": {
            "CategorySnippet": "snippet-53990XXXX_1"
        }
    }]

我应该如何用纯 JS 做到这一点？

Answer 1

您可以将出现的次数存储在 map 中，如下所示:

function checkArray(somearray){ 
    var temp = {};
    var id;
    var snippet;
    for(var i=0; i<somearray.length; i++){
        id = somearray[i].id;
        if(temp[id] == undefined){
            temp[id] = 0;
        }else{
            temp[id] += 1;
            snippet = somearray[i].components.CategorySnippet;
            somearray[i].components.CategorySnippet = snippet+"_"+temp[id];
        }
    }
    return somearray;
}

编辑:返回原始修改后的数组