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How to calculate sum by comparing key value with two object in javascript?

I have below two objects and i need to compare values object with points object based on the given answer like ‘Q1A1’ or ‘Q2A1’ and once key match in both object then it should return the sum of their respective answers.

const values = {
    Q1: {
        Q1A1: "Yes",
    },
    Q2: {
        Q2A1: "Yes",
    },
    Q3: {
        Q3A2: "No",
    },
};

const points = {
    Q1A1: 41,
    Q1A2: 0,
    Q2A1: 19,
    Q2A2: 0,
    Q3A1: 25,
    Q3A2: 0,
};

After comparing both above object based on the given answer the sum will be 60. So, how can i return the sum 60 by comparing these object ?

Tags:

4

Answers


  1. 0

    You need to loop your answers. I would suggest using true/false instead of Yes/No:

    const values = {
  Q1: {
    Q1A1: 'Yes'
  },
  Q2: {
    Q2A1: 'Yes'
  },
  Q3: {
    Q3A2: 'No'
  }
};

const points = {
  "Q1A1": 41,
  "Q1A2": 0,
  "Q2A1": 19,
  "Q2A2": 0,
  "Q3A1": 25,
  "Q3A2": 0
};

let total = 0;

// First loop your questions
for (const question in values) {
  // Then loop all answers in that question
  for (const [answer, value] of Object.entries(values[question])) {
    // Check if answer is 'Yes' and if that question even exists in possible question pool
    if (value == 'Yes' && points[answer] != null) {
        // Sum up total points
        total += points[answer];
    }
  }
}

alert('Your score is ' + total);
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  2. 0

    This can be done in multiple ways. Here is one :

    const val = Object.values(values)
  .reduce((sum, answers) => {
    sum += Object.entries(answers)
      .reduce((subSum, [answer, value]) => {
        if(value === 'No') return subSum;
        return subSum + points[answer]
       }, 0);
    return sum;
  }, 0);

console.log(val);
    <script>
  const values = {
    Q1: {
      Q1A1: "Yes",
    },
    Q2: {
      Q2A1: "Yes",
    },
    Q3: {
      Q3A2: "No",
    },
  };

  const points = {
    Q1A1: 41,
    Q1A2: 0,
    Q2A1: 19,
    Q2A2: 0,
    Q3A1: 25,
    Q3A2: 0,
  };
</script>
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  3. 0

    Use the values to drive the script:

    const total = Object.values(values)
  .reduce((acc, cur) => acc + Object.entries(cur)
    .reduce((accInner, [key, val]) => val !== 'No' && points[key] ? accInner + points[key] : accInner
    , 0)
  , 0);

console.log(total)
    <script>
  const values = {
    Q1: {
      Q1A1: "Yes",
    },
    Q2: {
      Q2A1: "Yes",
    },
    Q3: {
      Q3A2: "No",
    },
  };

  const points = {
    Q1A1: 41,
    Q1A2: 0,
    Q2A1: 19,
    Q2A2: 0,
    Q3A1: 25,
    Q3A2: 5, // should not be counted
  };
</script>

    Or (easier to read) make a lookup table and filter+reduce

    const lookup = Object.values(values).reduce((acc, cur) => {
  const [key, val] = Object.entries(cur)[0]
  if (val === "Yes") acc[key] = val;
  return acc;
}, {})

console.log(lookup)

const val = Object.entries(points)
  .filter(entry => lookup[entry[0]] && entry[1])
  .reduce((a, b) => a[1] + b[1]);
console.log(val)
    <script>
  const values = {
    Q1: {
      Q1A1: "Yes",
    },
    Q2: {
      Q2A1: "Yes",
    },
    Q3: {
      Q3A2: "No",
    },
  };

  const points = {
    Q1A1: 41,
    Q1A2: 0,
    Q2A1: 19,
    Q2A2: 0,
    Q3A1: 25,
    Q3A2: 5, // should not be counted
  };
</script>
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  4. 0

    you can try this:

     arr_points.includes(Object.keys(value).join('')) && Object.values(value).join('') === 'Yes'

                    ?accumulator +  points[Object.keys(value).join('')]
    
                    :accumulator
    const values = {
    Q1: {
        Q1A1: 'Yes'
    },
    Q2: {
        Q2A1: 'Yes'
    },
    Q3: {
        Q3A2: 'No'
    },
    Q4:{ QE:'No'}
}
const points = {
    Q1A1: 41,
    Q1A2: 0,
    Q2A1: 19,
    Q2A2: 0,
    Q3A1: 25,
    Q3A2: 0
}
const arr_points = Object.keys(points)
//
const Sum  = Object.entries(values).reduce((accumulator,[key, value]) => 
                    arr_points.includes(Object.keys(value).join('')) && Object.values(value).join('') === 'Yes'

                    ?accumulator +  points[Object.keys(value).join('')]
    
                    :accumulator
        
, 0 )

console.log(Sum)
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