need sum of value in array of array in JavaScript-CodePudding

I'm trying to sum values from an array. I have an array of arrays.

let exampleArray =[[[['1','2'],'3'],'4'],'5'];

I need the sum of all the values using reducer or map

CodePudding user response：

You first have to flatten array and then you can use reduceto get sum as:

let exampleArray = [[[['1', '2'], '3'], '4'], '5'];

const result = exampleArray
    .flat(Infinity)
    .reduce((acc, curr) =>  curr   acc, 0);
console.log(result);

You can also use recursion here as:

let exampleArray = [[[['1', '2'], '3'], '4'], '5'];

function getTotal(arr) {
    return !Array.isArray(arr[0])
            ?  arr[0]    arr[1]
            : getTotal(arr[0])    arr[1];
}

getTotal(exampleArray);

CodePudding user response：

const red = array => {
  return array.reduce((sum, current) => {
    if (Array.isArray(current)) {
      return sum   red(current)
    }
    return sum    current
  }, 0)
}
red([[['1','2'],'3'],'4'],'5'])