Remove part of json content-CodePudding

I want my json-file to be edited when the given time/date is in the past. I've tried delete termine[0] but this does not delete the part of the file.

My json-file

    [{
    "datum": "2020-10-10T10:00:00",
    "event": "..."
    },
    {
    "datum": "2021-10-10T10:00:00",
    "event": "..."
    },...
    ]

My Code

let termine = JSON.parse(fs.readFileSync("/home/pi/NeonBot/termine.json", "utf8"))

var now = new Date();
var date = termine[0].datum
    date = new Date(date)

do {
    delete termine[0]
    console.log(`Deleted Event`)
} while (date < now)

CodePudding user response：

You have an infinite loop, because you never update date in the loop.

You should also check the condition before deleting, not after.

while (new Date(termine[0].datum_) < now) {
    delete termine[0];
    console.log("Deleted Event");
}

Instead of deleting one element at a time, find the index of the first element to keep, then remove all the ones before it with splice.

let index = termine.findIndex(event => new Date(event.datum) >= now);
if (index > 0) {
    termine.splice(0, index);
}

fs.writeFileSync("/home/pi/NeonBot/termine.json", JSON.stringify(termine), "utf8");