compare list of ids in js lightning

Question

Hi i have list of Ids checkedContacts and boxPack is also list of ids, i want to compare both of them and make true. if checkedContact id and boxpack id matches.

 <aura:attribute name="checkedContacts" type="Id[]" />

 handleApplicationEventFired : function(component, event) {

    var message = event.getParam("message");
    alert('message'+message)
    // set the handler attributes based on event data
    component.set("v.messageFromEvent", message);

      var a = component.get("v.checkedContacts");

    if(a.length != 0)
    {
    var boxPack = component.find("dependent");
    console.log('boxPack.len' + boxPack.length);
    if (!Array.isArray(boxPack)) {
        boxPack = [boxPack];
    }

        for (var i = 0; i < boxPack.length; i++) {
            alert('boxpack'+boxPack[i].get("v.text"));
            alert('checkedContacts'+(component.get("v.checkedContacts")[i]));
            if(JSON.stringify(component.get("v.checkedContacts")[i])==boxPack[i].get("v.text"))
            {
                alert('inside');
                 boxPack[i].set("v.value", true);
            }

    } 
    }

}

Answer 1

try the below

var a = component.get("v.checkedContacts");
boxPack.forEach(function(element,index, boxPack) {//loop through all elements
if(a.indexOf(element) > -1)//to check if each individual element of array is present in checked contacts
boxPack[index].set("v.value", true);//setting index attr for matching contacts
});