Ruby Single Line If

In ruby we can write a conditional containing a single expression that normally takes up three lines.

Ruby single line if.

One equals sign in ruby means assignment make sure to use when you want to find out if two things are the same. Multi line comments. The tiny open source pillar holding up the entire internet. I ve touched on this gotcha briefly in the past when discussing the wat video but i thought a few examples of when single line conditionals can bite you would be fun.

Do you use these ruby shorthands. In ruby there are two types of comments. This makes sense because do end reads badly in a one liner but for multi line blocks leaving a closing hanging on its own line is inconsistent with everything else that uses end in ruby such as module class method definitions def etc and control structures if. I m getting into the habit of using these a lot more consistently so i wanted to share.

These shorthands beautifully consolidate three or more lines of code into one readable line of code. It is used to denote single line comment in ruby. Some languages seem to encourage terse coding as a way of being code studly but ruby coding style encourages elegance readability and maintainability above studliness. Its the most easiest typed comments.

Single line comments. Any definition should be written in a way that is clear and clean for maintenance and readability reasons so if the single line becomes unwieldy or confusing then spread it out. I m trying to write a single line if else statement in a view. If today christmaseve puts santa s on his way end shorthand.

Browse other questions tagged ruby on rails ruby on rails 4 or ask your own question. Here we will explain all the conditional statements and modifiers available in ruby. Ruby single line comments it is represented by sign. With an if statement you can check if something is true.

Use do end for multi line blocks. If you don t this right you won t get the expected results. Notice that we use two equal symbols to mean equality. Use braces for single line blocks.

But when you want to check for the opposite not true false.