What is type guarding in programming?

What is type guarding in programming?

Type guarding is a technique used in programming to ensure that a variable is of a specific type before performing operations on it.

Can you give me an example of type guarding?

Sure! In TypeScript, you can use the 'typeof' operator to check a variable's type. For instance:

function example(value: string | number) {
    if (typeof value === 'string') {
        console.log('String:', value);
    } else {
        console.log('Number:', value);
    }
}

Why is type guarding important?

Type guarding helps prevent runtime errors by ensuring that the code only executes with the expected data types, improving code safety.

Are there other methods of type guarding?

Yes, besides 'typeof', you can use 'instanceof' for class instances or user-defined type guards to check more complex types.