Ruby Nullish States

February 13, 2022 by Johnnyparky

Just want to point out a great post by Joyce Echessa talking about the differences between all the nullish state methods for Ruby: Nil? Empty? Present? Blank?

	`#nil?`	`#empty?`	`#blank?`	`#present?`
`5`	`false`	`NoMethodError`	`false`	`true`
`""`	`false`	`true`	`true`	`false`
`" "`	`false`	`false`	`true`	`false`
`"\t\n"`	`false`	`false`	`true`	`false`
`[]`	`false`	`true`	`true`	`false`
`["a"]`	`false`	`false`	`false`	`true`
`{}`	`false`	`true`	`true`	`false`
`{a: "b"}`	`false`	`false`	`false`	`true`
`Set.new`	`false`	`true`	`true`	`false`
`nil`	`true`	`NoMethodError`	`true`	`false`
`true`	`false`	`NoMethodError`	`false`	`true`
`false`	`false`	`NoMethodError`	`true`	`false`

She goes into a deep dive of each in her post.
https://blog.appsignal.com/2018/09/11/differences-between-nil-empty-blank-and-present.html

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