Replace key and strings in array in JSON

Question

I have this JSON below:

{
    "class": "List",
    "list": [{
            "name": "HandsUp"
            "schedule": {
                "type": "probability",
                "theme": "Regular",
                "occurance": {
                    "next": 1607687249008.9834,
                    "prev": null
                }
            }
        }, {
            "name": "Listing",
            "waitingScreenInfo": {
                "__class": "WaitingScreenInfo",
                "getRecapTime": 1607687753.7949834
            },
            "schedule": {
                "type": "Waiting2",
                "theme": "Listing",
                "occurance": {
                    "next": 1607687249008.9834,
                    "prev": null
                }
            }
        }
    ]
}

and I have this one:

{
    "HandsUp": "HandsDown",
    "Listing": "ImgList",
    "Waiting2": "UpNDown"
}

The equivalent of the strings in the first JSON are in the second JSON and I wonder how can I make a function that finds the equivalents of the strings in the first JSON and then replace all of them even though if there is more than one?

Do you want to replace the values in the first JSON that exist as properties in the second JSON with the values of the second one? — Henning Odén
– Henning Odén, Commented Dec 11, 2020 at 12:26
So where do you need to replace any keys then? That would be a bit more complex, than just replacing values. Your sample data suggests you might need only the latter here. — C3roe
– C3roe, Commented Dec 11, 2020 at 13:02
@CBore, sorry that I didn't show it in the first JSON. There were actually keys that had to be replaced too. — brian rockson
– brian rockson, Commented Dec 11, 2020 at 13:48

Aalexander · Accepted Answer · 2020-12-14 07:03:07Z

You can do this

Go through the array
check if property name equals the key from your "repl" object
if yes reassign the value with the one in your "repl" object

let stru = {
    "class": "List",
    "list": [{
        "name": "HandsUp",
        "schedule": {
            "type": "probability",
            "theme": "Regular",
            "occurance": {
                "next": 1607687249008.9834,
                "prev": null
            }
        }
    }, {
        "name": "Listing",
        "waitingScreenInfo": {
            "__class": "WaitingScreenInfo",
            "getRecapTime": 1607687753.7949834
        },
        "schedule": {
            "type": "Waiting2",
            "theme": "Listing",
            "occurance": {
                "next": 1607687249008.9834,
                "prev": null
            }
        }
    }]
}

const repl = {
    "HandsUp": "HandsDown",
    "Listing": "ImgList",
    "Waiting2": "UpNDown"
}

console.log("Before ", stru)

stru.list.forEach(element => {
    // keys and values correspond at the index
    let keys = Object.keys(repl);
    let values = Object.values(repl);
    for (let i = 0; i < keys.length; i++) {
        if (keys[i] === element.name) {
            element.name = values[i];
        }
    }

});


console.log("Afterwards ", stru)

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