¿Qué significa $ especial en la interpolación de cadenas?

What does$ special mean in string interpolation?

The $ special character identifies a string literal as an interpolated string. An interpolated string is a string literal that might contain interpolation expressions. When an interpolated string is resolved to a result string, items with interpolation expressions are replaced by the string representations of the expression results.

An interpolated string is a string literal that might contain interpolation expressions. When an interpolated string is resolved to a result string, items with interpolation expressions are replaced by the string representations of the expression results.

The backslash is the escape character and is used to make use of escape sequences. When there is a need to insert the escape character in an interpolated string, the same backslash is used, to escape the substitution of escape character with ” (blank). This allows the use of escape character in the interpolated string.

To include a brace, “{” or “}”, in the text produced by an interpolated string, use two braces, “{{” or “}}”. For more information, see Escaping Braces. As the colon (“:”) has special meaning in an interpolation expression item, in order to use a conditional operator in an interpolation expression, enclose that expression in parentheses.

It’s like string interpolation! Notice the equals sign in <%= %>. That tells ERB to render the contents of this tag. If you want to write a loop or an if statement in ERB you want to leave out the equals sign so ERB doesn’t render things that you don’t need. You may even get an error if you don’t use the correct ERB tag.

An ERB template is a file that ends with an .html.erb or .erb extension. Everything you write inside an ERB template is HTML. Unless… you use a special tag! Hello <%= name %>!

An introduction to ERB’s syntax, how to use ERB in your Ruby projects & how it compares to other templating engines, like HAML. Let’s do this!