What does the following warning mean: 'side-effecting nullary methods are discouraged'?
function, intellij-idea, parameters, scala
Solution
The common convention for nullary methods is to:
- in case it's a side-effecting method, signify it with use of parenthesis
- otherwise, drop parenthesis in case it's pure accessor-like method with no side effects
You're breaking this rule and IDE warns you about this.
See also https://stackoverflow.com/a/7606214/298389
Problem
I have a lot of nullary methods (methods with 0 parameters) in my scala test file. Hence, instead of writing them as : ``` def fooBar() = // ``` I write them as : ``` def fooBar = // ``` I get the following warning when I do so: ``` Warning:(22, 7) side-effecting nullary methods are discouraged: suggest defining as `def fooBar()` instead ``` What is the meaning of the warning? I am using intelliJ as my IDE and could not really find much about this warning on the web. EDIT And, I forgot to mention, when I use the brackets, the warning does not appear.