03 - Write Simple units of code

Question 1

What should be the maximum number of branch points?

Answer 1

4

Question 2

How should we reduce the number of branch points?

Answer 2

By splitting complex units into simpler ones; and if possible avoiding complex units all together.

Question 3

What is the benefit of minimizing branch points within a unit?

Answer 3

It makes a unit easier to modify and test.

Question 4

What is a branch point?

Answer 4

A Statenebt where excecution can take more than one direction, depending on a condition

Question 5

What sort of code counts as a branch point?

Answer 5

if
case
?
&&, ||
while
for
catch

Question 6

Let’s say I have this code:

public int foo(int myNumber) {
    if (myNumber > 10) {
        return int + 5;
    }
		if (myNumber < 20) {
        return int + 5;
    }
    return int;
}

And I decide to reduce the number of lines:

public int foo(int myNumber) {
    if (myNumber > 10 || myNumber < 20) {
        return int + 5;
    }
    return int;
]

Did I just decrease my branch points?

Answer 6

No. Although you reduced the number of lines, if counts as a branch point and so does ||. The number of branch points remains two.