I am having trouble trying to get aa value from a map where we variablize the key.
Let me show what I am trying to achieve. lets say I have a variable map with the values:
let map = {
Argentina : "222",
Brazil : "333",
Mexico : "444",
};
and I have a user input variable country
let country = "Argentina";
I would like to use the two as follows to use the user inputted key value to get value from the map.
console.log(map[$country]);
Few ways of doing what you want (probably there is a few more):
let map = {
Argentina : "222",
Brazil : "333",
Mexico : "444",
};
let country = "Argentina";
let country2: keyof typeof map = "Argentina";
// let country3: keyof typeof map = "Argentina2"; // Type '"Argentina2"' is not assignable to type '"Argentina" | "Brazil" | "Mexico"'.
console.log(map[country as keyof typeof map]);
console.log((map as any)[country]);
console.log(map[country2]);
Playground link
Another approach would be to specify a type (which will be less strict) for map
object explicitly
// let map: {[key: string]: string} = {
let map: {[key: string]: any} = {
Argentina : "222",
Brazil : "333",
Mexico : "444",
};
let country = "Argentina";
console.log(map[country]);
Playgrond link2
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