Ruby If Then One Line

These shorthands beautifully consolidate three or more lines of code into one readable line of code.

Ruby if then one line.

Ternary statements still work this is equal to. If item rigged then yes else no end if item rigged. Notice that we use two equal symbols to mean equality. With an if statement you can check if something is true.

Notice ruby uses elsif not else if nor elif. The github ruby styleguide recommends that one liners be reserved for trivial if else statements and that nested ternary operators be avoided. 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.

Yes else no end if item rigged yes else no end. In ruby the condition and the then part of an if expression must be separated by either an expression separator i e. The unless expression is the opposite of the if expression the code. Executes code if the conditional is true.

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. I m getting into the habit of using these a lot more consistently so i wanted to share. 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.

A 7 end note that the syntax for if one line blocks do not work anymore in ruby 1 9. 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. If a 4 then a 7 end or if a 4.

An if expression s conditional is separated from code by the reserved word then a newline or a semicolon.