For example: When the function has one expression, a good practice is to inline the arrow function. Syntax for comment-based help in functions. The compiler ignores everything from // to the end of the line. Best practices in comment writing and documentation . 2 //text. Write your function with one purpose. 3 /** documentation */ This is a documentation comment and in general its called doc comment. An inline comment is a comment on the same line as a statement. Comments are specially marked lines of text in the program that are not evaluated. 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 … DESCRIPTION Particularly when the comment must be frequently edited, as with the help and documentation for a function or script. If you debug using comments, there is a nice little trick: Inline comments should be separated by at least two spaces from the statement. /* */ is much safer to use because it doesn’t cause errors when the line break is removed. At the end of the function body. 3. 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 */. The comments I added at the function definition can be previewed whenever I use that function, even from other files. This would be the best time to leave open and honest comments about your code. If a function is called with a missing argument, the value of the missing argument is set to undefined. ... for example it can't check if you have used misleading english to describe the purpose of a function! Avoid using the line comment //. It is a good coding practice to put all declarations at the top of each script or function. 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. At a minimum, provide a helpful synopsis, description, parameter (for all), and example Undefined values can break your code. Before the function keyword. 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. Don’t build in everything but the kitchen sink. Suggested Best Practices Write your function with one purpose. The amount of time required to go back and figure out how something works is much larger after you’ve already built the function. It is a good habit to assign default values to arguments. Use the built in comment-based help system. 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. ... Use the built in comment-based help system. Additionally this will give you practice to getting used to commenting all of your files. When these comparison operators are used in an inline arrow function, it creates some confusion. There cannot be more than one blank line between the last line of the function help and the function keyword. Inline comments are unnecessary and in fact distracting if they state the … There are usually two syntactic ways to comment. 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. Ask Question Asked 8 years, 11 months ago. Fat arrow and comparison operators. Inline Comments. The comparison operators >, <, <= and >= look similar to the fat arrow => (which defines the arrow function). Comment what you consider needed - but don’t tell others your life story. Note that comments are just as much a part of the code as the program itself. The JDK javadoc tool uses doc comments when preparing automatically generated documentation. Commenting is best done before actually writing the code for your program. Comment-based help for a function can appear in one of three locations: At the beginning of the function body.

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