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Using fp-ts for Functional Programming in TypeScript

The Ternary Operator

Explore the ternary operator as a concise alternative to the if/else statement in JavaScript and TypeScript. Understand how it returns values consistently, supporting functional programming principles, and learn the importance of readable, value-returning expressions.

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The if/else statement

Let’s see how this statement works:

We all have choices to make. This is why all programming languages offer some variation of the if/else statement.

C++
function choices(thirsty) {
    if (thirsty) {
        return 'beer';
    } else {
        return 'hamburger';
    }
}
console.log(choices(true));

The code snippet above prints beer when thirsty is true and hamburger when thirsty is false.

Note: Some languages are very strict about their booleans. For example, Java and C# would require a boolean for thirsty and reject anything else. Other languages, like Python and JavaScript, are true to their dynamic nature. They are more flexible and only require the values to be truthyIn JavaScript, a value is truthy if JavaScript’s built-in type coercion converts it to true.. This means they will ...