exclude items in dictionary in typescript

To exclude particular items from a dictionary (object), you can use the filter method and Object.entries to iterate over the entries of the object. Here's an example code snippet:

index.ts
interface Dictionary<T> {
  [key: string]: T;
}

const myDict: Dictionary<number> = {
  a: 1,
  b: 2,
  c: 3
};

const excludeKeys = ['a', 'c'];

const filteredDict: Dictionary<number> = Object.fromEntries(
  Object.entries(myDict).filter(([key, _]) => !excludeKeys.includes(key))
);

console.log(filteredDict); // { b: 2 }
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In this example, we define a dictionary myDict with keys and values of type string and number respectively. We then define an array excludeKeys with keys that we want to exclude from the dictionary.

We use the Object.entries method to convert the dictionary into an array of key-value pairs. We then apply the filter method on this array to exclude entries whose key is present in excludeKeys.

Finally, we use the Object.fromEntries method to convert the filtered array back into an object (dictionary).

The resulting filtered dictionary is stored in filteredDict and printed to the console.