Check out example codes for "loop through object typescript". It will help you in understanding the concepts better.

Code Example 1

// This solution is for when you want to use 
// `break`, `return` which forEach doesn't support
for (const key in tempData) {
      if (tempData.hasOwnProperty(key)) {
        // your logic here

Code Example 2

  ([key, value]) => console.log(key, value);

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