Ruby If Then One Line

Yes else no end if item rigged yes else no end.

Ruby if then one line.

I m getting into the habit of using these a lot more consistently so i wanted to share. In ruby the condition and the then part of an if expression must be separated by either an expression separator i e. Or a newline or the then keyword. Ruby has some amazing shorthands for if then else statements.

A 5 a 7 if a 4 print a prints 5 since the if block isn t executed unless expression. The github ruby styleguide recommends that one liners be reserved for trivial if else statements and that nested ternary operators be avoided. A 7 end note that the syntax for if one line blocks do not work anymore in ruby 1 9. If foo then a elsif bar then b else c end you could use cases ruby s switch operator if find your control statements overly complex.

An if expression s conditional is separated from code by the reserved word then a newline or a semicolon. These shorthands beautifully consolidate three or more lines of code into one readable line of code. So all of these would work. You could use the then keyword but its considered bad practice.

If the conditional is not true code specified in the else clause is executed. The unless expression is the opposite of the if expression the code. With an if statement you can check if something is true. One equals sign in ruby means assignment make sure to use when you want to find out if two things are the same.

But when you want to check for the opposite not true false. Notice that we use two equal symbols to mean equality. If item rigged then yes else no end if item rigged. If you don t this right you won t get the expected results.

Ternary statements still work this is equal to.