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javascriptreactjsimmutabilityimmutable.js

Concat values of an immutable map in javascript

i'm having an immutable map like this: pinMap = Map({pin1: 1}, {pin2: 2}, {pin3: 3}, {pin4: 4}). Now i want to create an objct as follows: obj = {pinCode: 1234} whose value is the merged values of the map. I've tried the following command: const obj = {obj: {...pinMap.values()} } with no success. Do you have any idea on how to achieve this?

Solution

  • Assuming your map was created as string: number pairs,

      let pinMap = new Map();
  pinMap.set("pin1", 1); //Assuming these are numbers
  pinMap.set("pin2", 2);
  pinMap.set("pin3", 3);
  pinMap.set("pin4", 4);

    Map has a couple of ways to iterate over the map. For ease, we can use the forEach iteration method

      let pinCode = "";
  pinMap.forEach((value) => {
    pinCode = pinCode + value.toString();
  });

  let result = {
    pinCode: pinCode
  };