I am getting the array from multidimensional array using map. Below is my code
var data = [{"name":"ramu","id":"719","gmail":"[email protected]","ph":988989898,"points":36},
{"name":"ravi","id":"445","gmail":"[email protected]","ph":4554545454,"points":122},
{"name":"karthik","id":"866","gmail":"[email protected]","ph":2332233232,"points":25}]
var result = data.map(function(arr, count) {
return arr.points;
});
Output is [36, 122, 25]. But i need the sum as 183?
Use Array#reduce method to get the sum of the property.
var data = [{"name":"ramu","id":"719","gmail":"[email protected]","ph":988989898,"points":36},
{"name":"ravi","id":"445","gmail":"[email protected]","ph":4554545454,"points":122},
{"name":"karthik","id":"866","gmail":"[email protected]","ph":2332233232,"points":25}]
var result = data.reduce(function(tot, arr) {
// return the sum with previous value
return tot + arr.points;
// set initial value as 0
},0);
console.log(result);Use Array's reduce() like the following:
var data = [{"name":"ramu","id":"719","gmail":"[email protected]","ph":988989898,"points":36},
{"name":"ravi","id":"445","gmail":"[email protected]","ph":4554545454,"points":122},
{"name":"karthik","id":"866","gmail":"[email protected]","ph":2332233232,"points":25}];
var result = data.reduce((sum, item) => sum + item.points ,0);
console.log(result);just write follwing code after your original code
var result = result.reduce(add, 0);
function add(a, b) {
return a + b;
}
console.log(result);
