Ruby If Then One Line

The github ruby styleguide recommends that one liners be reserved for trivial if else statements and that nested ternary operators be avoided.

Ruby if then one line.

The unless expression is the opposite of the if expression the code. 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. Executes code if the conditional is true. Notice ruby uses elsif not else if nor elif.

If the conditional is not true code specified in the else clause is executed. Or a newline or the then keyword. A 5 a 7 if a 4 print a prints 5 since the if block isn t executed unless expression. I m getting into the habit of using these a lot more consistently so i wanted to share.

If you don t this right you won t get the expected results. With an if statement you can check if something is true. If a 4 then a 7 end or if a 4. In ruby the condition and the then part of an if expression must be separated by either an expression separator i e.

These shorthands beautifully consolidate three or more lines of code into one readable line of code. Notice that we use two equal symbols to mean equality. Ruby has some amazing shorthands for if then else statements. An if expression s conditional is separated from code by the reserved word then a newline or a semicolon.

So all of these would work. If item rigged then yes else no end if item rigged. But when you want to check for the opposite not true false. A 7 end note that the syntax for if one line blocks do not work anymore in ruby 1 9.

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