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TheCubicleBuddha/lettingTheDevKnowUpFront.ts

Created April 19, 2019 20:10
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In this example, we no longer get a runtime exception because we've communicated our needs.
Raw
lettingTheDevKnowUpFront.ts
function getUserById(id: number){
// hits a database and returns the value
}
const guid = "b5f770f2-197c-4bf5-a31f-cfec4f545d06";
const user = getUserById(guid);
// ^ Compiler error: Argument of type string is not assignable to parameter of type 'number'.
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