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JavaScript reduce sum array with undefined values
We have an array of numbers that contains some undefined and null values as well. We are required to make a function, say quickSum that takes in the array and returns its quick sum, ignoring the undefined and null values.
The full code for doing so will be −
Example
const arr = [23,566,null,90,-32,undefined,32,-69,88,null];
const quickSum = (arr) => {
const sum = arr.reduce((acc, val) => {
return acc + (val || 0);
}, 0);
return sum;
};
console.log(quickSum(arr));Output
The output in the console will be −
698
Updated on: 19-Aug-2020
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