twoSum.js

class TwoSum {

    constructor(_inputArray, _targetValue) {
        this.inputArray = _inputArray;
        this.targetValue = _targetValue
        this.outputArray = []
    }

    get() {
        let i, j;
        for (i = 0; i < this.inputArray.length; i++) {

            for (j = 0; j < this.inputArray.length; j++) {

                if (i == j) {
                    continue;
                }

                if (this.inputArray[i] + this.inputArray[j] == this.targetValue) {
                    this.outputArray = [i, j];
                    break;
                }
            }
        }
        console.log(this.outputArray);
        return this.outputArray;
    }
}


let twoSum = new TwoSum([2, 5, 9, 1, 3, 7, 2], 4);
twoSum.get();