I have two array of objects arr 1 and arr 2
arr1 = [{fruit: 'apple',count: 0}] arr2 = [{fruit: 'apple',count: 0}]
Need to create the function which accepts arr1 and arr2 as arguments and compare the fruit name if its same need to update the count value based on the count input else push the value to the array
sample output 1:
Inputs:
arr1 = [{fruit: 'apple',count: 10}] arr2 = [{fruit: 'apple',count: 30},{fruit: 'orange',count: 20}]
Output:
[{fruit: 'apple',count: 40},{fruit: 'orange',count: 20}]
sample output2
Inputs:
arr1 = [{fruit: 'apple',count: 15}] arr2 = [{fruit: 'orange',count: 20}]
Output:
[{fruit: 'apple',count: 15},{fruit: 'orange',count: 20}]
code that i have tried:
function compareAndUpdateCount(arr1, arr2) {
for (i = 0; i < arr1.length; i++) {
if (arr1[i].fruit === arr2[i].fruit) {
arr1[i].count = arr1[i].count + arr2[i].count;
} else {
arr1.push(arr2[i])
}
}
}
This works fine when the array lengths are same ,if its different need help on writing the optimise code and also the reduce time complexity if we have more data
Loop within another loop to compare all object properties and then use an if statement to sum up the counter and remove the item of the second array using splice()
Try the following snippet:
var arr1 = [{fruit: 'apple',count: 10}];
var arr2 = [{fruit: 'apple',count: 30}, {fruit: 'orange',count: 20}, {fruit: 'apple',count: 20}, {fruit: 'banana',count: 20}];
var counter = 0;
for(obj1 in arr1){
for(obj2 in arr2){
if (arr1[obj1].fruit === arr2[obj2].fruit) {
arr1[obj1].count = arr1[obj1].count + arr2[obj2].count;
arr2.splice(counter, 1);
counter++;
}
}
}
arr1 = arr1.concat(arr2);
console.log(arr1)var result;
if(arr1.length < 1) {
result = arr2;
} else if(arr2.length < 1) {
result = arr1;
} else {
var existing = [];
var arr3 = [];
arr1.forEach(function (item, index) {
arr2.forEach(function (item2, index2) {
if(item.fruit === item2.fruit) {
item.count = item.count + item2.count;
existing.push(index2);
} else {
arr3.push(item);
if(!existing.includes(index2)) {
arr3.push(item2);
}
}
});
});
result = arr3;
}
You will need a setter for count in your class Make a new array of objects temparr
temparr[0] = arr1[0];
if((arr1[0].fruit).equals(arr2[0].fruit)) {
temparr[0].setcount(arr1[0].count+arr2[0].count);
}
else {
temparr[1]=arr2[0];
}
At the end u print temparr