Ruby Multiline String Array

How to use ruby string interpolation.

Ruby multiline string array.

Here s an example of an array that contains a string a nil value an integer and an array of strings. Damir svrtan 3 min read. At least it hadn t until a week ago when the squiggly heredoc was introduced. If you have you already know that ruby doesn t have a nice out of the box solution for this problem.

String can be written within double quotes. You have learned about string concatenation appending prepending interpolation in ruby this allows you to combine multiple strings together. When a size and an optional default are sent an array is created with size copies of default take notice that all elements will reference the same object default. Lastly if you want to do more complex string parsing check out the built in stringscanner class.

Ruby supports multiline strings by providing two types of here doc syntax. In the first form if no arguments are sent the new array will be empty. String each line separates lines by the optional argument sep string which defaults to which itself defaults to n simply. Q is another way to write a single quoted string and can be multi line which is useful q gives a double quoted string x is a shell command i gives an array of symbols ruby 2 0 0 s turns foo into a symbol foo i don t know any others but there may be some lurking around in there.

The character is used and string is enclosed within character. Have you ever had to write a nicely indented multiline string in ruby. Working with strings working with arrays 1 working with hashes 1 string interpolation. We will show three ways to print multi line string.

Interpolation or merging of variables into strings is a powerful technique. It allows you to templatize a string. Writing multiline string is very simple in ruby language. The second form creates a copy of the array passed as a parameter the array is generated by calling to ary on the parameter.

Arrays are often used to group together lists of similar data types but in ruby arrays can contain any value or a mix of values including other arrays. If you type the code above in your editor and syntax highlighting for ruby code is used it should highlight the code in the double quoted string so it gives you a visual clue about the interpolation.