Find/Replace object in an array and add a key Java…

I am trying to add a key to an Object of Array as isActive: true, and then I want to find the object in the actual array with the same label as that of selectedFilterList and replace it in this.bindingData else add isActive: false

if (this.selectedFilterList && this.selectedFilterList.length) {
    //Do something
} else {
    this.bindingData = this.data.map((value) => {
        var newKey = Object.assign({}, value);
        newKey.isActive = false;
        return newKey;
    });
}

this.data = [
    { label: "Audi", value: "Audi" },
    { label: "BMW", value: "BMW" },
    { label: "Fiat", value: "Fiat" },
    { label: "Honda", value: "Honda" },
    { label: "Jaguar", value: "Jaguar" },
    { label: "Mercedes", value: "Mercedes" },
    { label: "Renault", value: "Renault" },
    { label: "VW", value: "VW" },
    { label: "Volvo", value: "Volvo" },
];

this.selectedFilterList = [
    { label: "Audi", value: "Audi", isActive: true },
    { label: "Fiat", value: "Fiat", isActive: true },
    { label: "BMW", value: "BMW", isActive: true },
];

I have tried this which is working but i don’t think so its a best approach

if (this.selectedFilterList && this.selectedFilterList.length) {
            this.bindingData = this.data.map(value => {
                var newKey = Object.assign({}, value);
                newKey.isActive = false;
                return newKey;
            });
            this.bindingData.map(data => {
                this.selectedFilterList.forEach(value => {
                    if (value.label == data.label) {
                        data.isActive = value.isActive;
                    }
                });
            });
        } else {
            this.bindingData = this.data.map(value => {
                var newKey = Object.assign({}, value);
                newKey.isActive = false;
                return newKey;
            });
        }

Answer

You can use Array.prototype.reduce() on data, check if each item in data is present in selectedFilterList using Array.prototype.some() and add isActive flag value accordingly. Here is the sample code:

var bindingData = data.reduce((acc,datum)=>{
    if(selectedFilterList.some((item,index)=>(item.value === datum.value))){
     return acc.concat({...datum,isActive:true});   
}

return acc.concat({...datum,isActive:false});

},[]);

Find/Replace object in an array and add a key Javascript

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Answer