| ... |
... |
@@ -3,7 +3,7 @@ |
| 3 |
3 |
* **Functions should be small.** Maximum 20 lines. Blocks and indentation should also be short. Blocks inside if, else, or while statements should be one line. A function call should probably be included. Indentation depths should be no more than one or two levels. |
| 4 |
4 |
* **Functions should do only one task.** They should do its task well. They should do only that task. All instructions within the function should be on the same abstraction level. Sub-functions perform tasks which are one abstraction-level deeper. Sections within a function are symptoms that it performs more than one task. These function should be decomposed. |
| 5 |
5 |
* **One abstraction level per function.** The 'stepdown rule' states that code should be easy to read from top to bottom: Under a function, its subfunctions should go down one level of abstraction. |
| 6 |
|
-* **The flow of reading should follow the flow of control.** The flow of control is the chronological order in which code is executed. The order of the functions should be adjusted accordingly. [[Here|doc:.Function Ordering Example.WebHome]] is an example. |
|
6 |
+* **The flow of reading should follow the flow of control.** The flow of control is the chronological order in which a function is called. [[Here|doc:.Function Ordering Example.WebHome]] is an example. |
| 7 |
7 |
* **Separate statement and query.** Functions should either provide information about an object or do something with an object, but not both. |
| 8 |
8 |
* **Exceptions are better than error codes** (with if/else statements). |
| 9 |
9 |
* Error.java is a dependency magnet with its enumeration of error codes and should be replaced by exceptions and derivatives of the Exception class, which allows easy extensibility in accordance with the Open-Closed Principle. |
| ... |
... |
@@ -27,4 +27,4 @@ |
| 27 |
27 |
* **Avoid flag arguments.** It shows that the function performs two tasks, depending on whether the flag is true or false. |
| 28 |
28 |
* **Dyads should be converted to monads if possible**, but cannot always be avoided. Sometimes they are useful, e.g. when passing 2D coordinates, because the arguments are connected by a cohesion. |
| 29 |
29 |
* **Argument objects:** When many arguments are to be passed to a function, it often makes sense to combine them as a separate concept in a new class/data structure. |
| 30 |
|
-* **Verbs and keywords**: Function names can form a logical combination with the arguments, such as `write(name)`, or you can include the arguments in the function name, such as `writeName(name)`, to make it more readable. |
|
30 |
+* **Verbs and keywords**: Function names can form a logical combination with the arguments, such as "write(name)", or you can include the arguments in the function name, e.g. to avoid confusion. |
