Ruby can inject an array of values into a string by replacing any placeholders with the values from the supplied array.
"Hello %s, my name is %s!" % ['World', 'br3nt'] # => Hello World, my name is br3nt!
The place holders are represented by two
%s and the values are supplied by the array
['Hello', 'br3nt']. The
% operator instructs the string to inject the values of the array.