Ruby If Then One Line

So all of these would work.

Ruby if then one line. With an if statement you can check if something is true. A 5 a 7 if a 4 print a prints 5 since the if block isn t executed unless expression. If item rigged then yes else no end if item rigged. The github ruby styleguide recommends that one liners be reserved for trivial if else statements and that nested ternary operators be avoided.

If the conditional is not true code specified in the else clause is executed. Or a newline or the then keyword. 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.

Ternary statements still work this is equal to. One equals sign in ruby means assignment make sure to use when you want to find out if two things are the same. Notice that we use two equal symbols to mean equality. I m getting into the habit of using these a lot more consistently so i wanted to share.

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. But when you want to check for the opposite not true false. Notice ruby uses elsif not else if nor elif.

If a 4 then a 7 end or if a 4. You could use the then keyword but its considered bad practice. The unless expression is the opposite of the if expression the code. If you don t this right you won t get the expected results.

In ruby the condition and the then part of an if expression must be separated by either an expression separator i e.