Given a list of numeric values, this method turns them into a string of bar heights. Useful for quickly graphing the shape of an array. Remember to use puts so you can see the output. See spark for a simple way of printing a spark graph.

Introduced in v2.5

Examples

# Example 1

puts (spark_graph (range 1, 5))

#=> ▁▃▅█

# Example 2

puts (spark_graph (range 1, 5).shuffle)

#=> ▃█▅▁