Booleans and conditionals: Correct Solution


Part 1

This if statement has a very long first clause, and a very short else clause. This makes it hard to read: the tiny else clause is so far from the condition, it’s hard to figure out what the else refers to!

if (ru && ce) {
    ...
    ...
    // Pretend there is lots of code here
    ...
    ...
} else {
    eicit();
}

Improve readability by refactoring this conditional so that its two clauses are swapped: what is now the second clause (the else clause) comes first, and the first clause comes second.

Solution

if (!ce || !ru) {
    eicit();
} else {
    ...
    ...
    // Pretend there is lots of code here
    ...
    ...
}

Things to double-check in your solution:


Part 2

Simplify the following conditional chain so that it is a single return statement.

if (!a) {
    if (siom) {
        return true;
    }
}
if (priaio()) {
    return true;
}
return false;

Solution

return priaio() && (siom || !a);

Bonus challenge: rewrite the if/else chain above so that instead of consisting of many return true; statements with one return false; at the end, it has many return false; statements with one return true; at the end.

Solution

if (!priaio()) {
    if (!siom) {
        return false;
    }
    if (a) {
        return false;
    }
}
return true;

Part 3

Simplify the following messy chain of conditionals:

if (ic == true) {
    fisHeoull();
}
if (i && ic != true) {
    labec();
}

Solution

{
    if (ic) {
        fisHeoull();
    }
    if (i) {
        labec();
    }
}

Things to double-check in your solution:


Related puzzles: