JavaScript:如何解释和理解带有似乎没有价值的参数的函数？

setTimeout(function(a, b) {
    console.log('This is a timeout function');
}, 1000, 'unusedArg1', 'unusedArg2');

function higherOrderFunction(callback) {
    // ... some logic ...
    callback('someValue', 'anotherValue');
}

higherOrderFunction(function(value) {
    console.log('Received value:', value);
});

function exampleFunction(requiredArg, optionalArg = 'default', ...restArgs) {
    console.log('Required:', requiredArg);
    console.log('Optional:', optionalArg);
    console.log('Rest:', restArgs);
}

exampleFunction('hello');

function example(_unusedArg1, _unusedArg2) {
    // Function body
}

function example({ requiredProp, optionalProp = 'default' }) {
    console.log('Required:', requiredProp);
    console.log('Optional:', optionalProp);
}