TypeScript, Looping through a dictionary

Question

In my code, I have a couple of dictionaries (as suggested here) which is String indexed. Due to this being a bit of an improvised type, I was wondering if there any suggesti

Answer 1

Shortest way to get all dictionary/object values:

Object.keys(dict).map(k => dict[k]);

Answer 2

Ians Answer is good, but you should use const instead of let for the key because it never gets updated.

for (const key in myDictionary) {
    let value = myDictionary[key];
    // Use `key` and `value`
}

Answer 3

To get the keys:

function GetDictionaryKeysAsArray(dict: {[key: string]: string;}): string[] {
  let result: string[] = [];
  Object.keys(dict).map((key) =>
    result.push(key),
  );
  return result;
}

Answer 4

To loop over the key/values, use a for in loop:

for (let key in myDictionary) {
    let value = myDictionary[key];
    // Use `key` and `value`
}

Answer 5

How about this?

for (let [key, value] of Object.entries(obj)) {
    ...
}

Answer 6

If you just for in a object without if statement hasOwnProperty then you will get error from linter like:

for (const key in myobj) {
   console.log(key);
}

WARNING in component.ts
for (... in ...) statements must be filtered with an if statement

So the solutions is use Object.keys and of instead.

for (const key of Object.keys(myobj)) {
   console.log(key);
}

Hope this helper some one using a linter.