验证json以确保所有数组属性值都是相同的对象类型

比较对象数组的函数,返回所选类型的所有值

function returnTypeMatched(arr,type){
    var r = [];
    if(type === undefined){type = 'String';}
    for(var i=0,ilen=arr.length;i<ilen;i++){
        var o = {},
            item = arr[i],
            keys = Object.keys(item);
        for(var j=0,jlen=keys.length;j<jlen;j++){
            var key = keys[j],
                value = item[key];
            if(arr[i][keys[j]].constructor.name === type){
                o[key] = value;
            }
        }
        if(Object.keys(o).length > 0){r.push(o);}
    }
    return r;
}

对你来说

var myObject = {
        "key1": "val_1",
        "key_2": [{
            "a": "b"
        }, {
            "c": "d"
        }, {
            "f": 1
        }]
    },
    myKeys = Object.keys(myObject);

for(var i=0,ilen=myKeys.length;i<ilen;i++){
    var key = myKeys[i],
        value = myObject[key];
    if(value.constructor.name === 'Array'){
        var firstKeyType = value[0][Object.keys(value[0])[0]].constructor.name;
        myObject[key] = returnTypeMatched(value,firstKeyType);
    }
}

console.log(myObject);
/* Returns
{
    "key1": "val_1",
    "key_2": [{
        "a": "b"
    }, {
        "c": "d"
    }]
}
*/