How to access Enum in typescript ? giving error "Element implicitly has an any type because index expression is not of type number"

Question

export enum r {
  color1 = "Red"
  color2 = "green"
  color3 = "blue"
}

ar = ["color1", "color2"];
ar.map(e => {
  if (r[e as any] !== undefined) {
    return r[e]
  }
})

Above statement giving "Element implicitly has an any type because index expression is not of type number"

Answer 1

You need to type ar with keyof typeof to let TypeScript know your array contains values from your enum:

export enum r {
  color1 = "Red",
  color2 = "green",
  color3 = "blue",
}

const ar: (keyof typeof r)[] = ["color1", "color2"];
const newVal = ar.map((e) => {
  if (r[e] !== undefined) {
    return r[e];
  }
});

Here is a good in-depth answer about it

Answer 2

You do not have commas after every item in your enum. However, the following is how you can typecast the argument to be type of key of the enum:

export enum r {
color1 = "Red",
color2 = "green",
color3 = "blue",
}

const ar = ["color1","color2"];
const new_ar = ar.filter(e => {
    if (e in r && r[e as keyof typeof r]) 
    {return true;}
    else {return false;}
})

The problem with your approach is you are using map and you need to return in every iteration. What you need is filter.