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Source: sebastiandedeyne.com
When to add types and when to infer in TypeScript
Type inference is the ability to derive types from other pieces of code. This is how I decide when or when not to explicitly add types in TypeScript. In this first example, the least amount of types possible were added: the parameters. TypeScript infers that result is a number despite not adding a return type to divide, or a type declaration to the result variable.
TypeScript knows that result has the same type of whatever divide returns, which is a number.
TypeScript knows that result has the same type of whatever divide returns, which is a number.
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