JavaScript - merge two arrays of objects and de-duplicate based on property value

Question

I want to update (replace) the objects in my array with the objects in another array. Each object has the same structure. e.g.

var origArr = [
          


        

Answer 1

Same as @gevorg answer, but you may want to also add a new object to the original array if no matches are found.

let combinedEvents = origEvents;
for(let i =0; i< newEvents.length; i++){
  let newEvent = newEvents[i];
  for(let j =0; j< origEvents.length; j++){
    let origEvent = origEvents[j];
    if(newEvent.events_id == origEvent.events_id){
      combinedEvents.splice(j,1, newEvent);
      break;
    } else if(j === origEvents.length - 1){
      combinedEvents.push(newEvent);
      break;
    }
  }
}