typescript function overloads

typescript function overloads allow us to define multiple function signatures for a single function. this can be useful when a function can accept different types or numbers of arguments and return different types of values based on the input.

here's a step-by-step tutorial on how to use function overloads in typescript with a code example:

1. define the function with multiple signatures:

2. in the code above, we defined two function signatures for the `combine` function:
- the first signature takes two strings and returns a string by concatenating them.
- the second signature takes two numbers and returns a number by adding them.
- the last implementation signature is a catch-all that throws an error if the arguments are not of the expected types.

3. now you can call the `combine` function with either strings or numbers:

4. if you try to call the `combine` function with arguments of different types, typescript will give you a type error:

using function overloads in typescript can make your code more type-safe and provide better type checking when dealing with functions that have multiple possible input and output types.

i hope this tutorial helps you understand how to use function overloads in typescript! let me know if you have any questions.

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