Ruby Multiline String Array

How to use ruby string interpolation.

Ruby multiline string array.

Writing multiline string is very simple in ruby language. In the first form if no arguments are sent the new array will be empty. You have learned about string concatenation appending prepending interpolation in ruby this allows you to combine multiple strings together. Here s an example of an array that contains a string a nil value an integer and an array of strings.

If you have you already know that ruby doesn t have a nice out of the box solution for this problem. Damir svrtan 3 min read. The second form creates a copy of the array passed as a parameter the array is generated by calling to ary on the parameter. 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.

Returns a new array. 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. Ruby supports multiline strings by providing two types of here doc syntax.

Lastly if you want to do more complex string parsing check out the built in stringscanner class. Multiline strings in ruby 2 3 the squiggly heredoc. Have you ever had to write a nicely indented multiline string in ruby. We will show three ways to print multi line string.

The first syntax uses and additional dash but allows you to indent the end of here doc delimiter eos in the example. It allows you to templatize a string. Interpolation or merging of variables into strings is a powerful technique. 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.

Working with strings working with arrays 1 working with hashes 1 string interpolation. 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.