function comment best practice

Use the built in comment-based help system. At the end of the function body. At a minimum, provide a helpful synopsis, description, parameter (for all), and example The first is called a single line comment and, as implied, only applies to a single line in the "source code" (the program). They should start with a # and a single space. 3. 3 /** documentation */ This is a documentation comment and in general its called doc comment. Avoid using the line comment //. The compiler ignores everything from // to the end of the line. Fat arrow and comparison operators. Don’t build in everything but the kitchen sink. ... Use the built in comment-based help system. The JDK javadoc tool uses doc comments when preparing automatically generated documentation. There cannot be more than one blank line between the last line of the function help and the function keyword. Additionally this will give you practice to getting used to commenting all of your files. Single-line comments are referred to as inline comments when they appear at the end of a line of code. Comment & Description; 1 /* text */ The compiler ignores everything from /* to */. Comment what you consider needed - but don’t tell others your life story. Here is another example where I call a function from a third party library: In these particular examples, the type of commenting (or documentation) used is … This would be the best time to leave open and honest comments about your code. When these comparison operators are used in an inline arrow function, it creates some confusion. Undefined values can break your code. If a function is called with a missing argument, the value of the missing argument is set to undefined. Before the function keyword. Comment-based help for a function can appear in one of three locations: At the beginning of the function body. Outdated comments can be more of a detriment than no comment at all, so remember to maintain and update comments regularly along with everything else. Inline Comments. ... for example it can't check if you have used misleading english to describe the purpose of a function! This is a general programming best practice — making sure that you create functions that fulfill one job at a time makes it easy for other developers to debug and change your code without having to scan through all the code to work out what code block performs what function. An inline comment is a comment on the same line as a statement. Ask Question Asked 8 years, 11 months ago. The comparison operators >, <, <= and >= look similar to the fat arrow => (which defines the arrow function). The comments I added at the function definition can be previewed whenever I use that function, even from other files. Comments are specially marked lines of text in the program that are not evaluated. Suggested Best Practices Write your function with one purpose. DESCRIPTION Particularly when the comment must be frequently edited, as with the help and documentation for a function or script. For example: It is a good habit to assign default values to arguments. There are usually two syntactic ways to comment. When the function has one expression, a good practice is to inline the arrow function. The amount of time required to go back and figure out how something works is much larger after you’ve already built the function. Commenting is best done before actually writing the code for your program. Best practices in comment writing and documentation . It is a good coding practice to put all declarations at the top of each script or function. Write your function with one purpose. Syntax for comment-based help in functions. Note that comments are just as much a part of the code as the program itself. Inline comments Comments on the same line as a statement can be distracting, but when they don't state the obvious, and particularly when you have several short lines of code which need explaining, they can be useful. Inline comments are unnecessary and in fact distracting if they state the … If you debug using comments, there is a nice little trick: /* */ is much safer to use because it doesn’t cause errors when the line break is removed. 2 //text. Inline comments should be separated by at least two spaces from the statement.

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