How Do JavaScript's Ternary Operators (? and :) Work for Conditional Assignments?

Ternary Operators: Unraveling the Syntax of ? and : in JavaScript

In JavaScript, the mysterious characters ? and : have a hidden superpower, unlocking the secrets of conditional assignments. These characters form the core of the Conditional Operator, also known as the ternary operator.

Consider the following line:

hsb.s = max != 0 ? 255 * delta / max : 0;

This line exemplifies the power of the conditional operator. The question mark (?) acts as a gateway to the "then" clause:

if (max != 0)

If this condition evaluates to true, the value to the right of the question mark, in this case 255 * delta / max, is executed. Otherwise, the expression to the right of the colon (:), which is 0, is executed.

This can be visualized as:

hsb.s = condition ? true_value : false_value;

In other words, the value of hsb.s will be assigned either 255 * delta / max if max is not equal to 0, or 0 otherwise.

The code you provided can be rewritten using the traditional if-else syntax:

if (max != 0) {
  hsb.s = 255 * delta / max;
} else {
  hsb.s = 0;
}

Understanding the nuances of ternary operators allows you to write concise and elegant JavaScript code, making your programs more readable and maintainable.

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