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prestonp / typescript-noob

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i don't know how to typescript so i'm collecting all of the weird syntax errors i don't understand as a reference guide.

object implicitly has an 'any' type

const phonebook = {
    jim: 2813308004,
    pam: 7133211234,
}

const getNumber = (person : string) => phonebook[person] // Index signature of object type implicitly has an 'any' type:

Add an index signature to the object

+interface Phonebook {
+  [key: string]: number;
+}

-const phonebook = {
+const phonebook: Phonebook = {
  jim: 2813308004,
  pam: 7133211234,
}

const getNumber = (person : string) => phonebook[person]

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