Question

156

How to Map Array values from one Array to Another Array JavaScript?

rated 0 times [ 159] [ 3] / answers: 1 / hits: 17893 / 6 Years ago, wed, august 29, 2018, 12:00:00

This is my Code. Where I want to Pass the Values of kvArray to Second Array.

var kvArray = [{key: 1, value: 10}, 

               {key: 2, value: 20}, 

               {key: 3, value: 30}];



var reformattedArray = kvArray.map(obj => { 

   var payload = {};

   payload[rt];

   payload[do];

   payload[f1];

   payload[obj.key] = obj.value;

   console.log(payload[rt]);

   return payload;

});

The console.log is coming undefined.
Can anyone help here? I am pretty new to Map function.

I want to Print this result.

 payload[do]=10

 payload[f1]=20

 payload[f2]=30

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kaileya

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3 Years ago

answered 6 Years ago brodyfrancisi · Accepted Answer

var kvArray = [{key: 1, value: 10}, 

               {key: 2, value: 20}, 

               {key: 3, value: 30}];



var reformattedArray = kvArray.map(obj =>{ 

   var payload = {};

   const mapping = [null, 'rt', 'do', 'f1']; 

   const key = mapping[obj.key];

   payload[key] = obj.value;

   return payload;

});

console.log(reformattedArray);