Function parse_parameter 

pub fn parse_parameter(s: &str) -> Result<Parameter>

Parse a parameter string into similarity and values

Examples

• “contains:damian” -> (Similarity::Contains, vec![“damian”])
• “equals:black,steel,wood” -> (Similarity::Equals, vec![“black”, “steel”, “wood”])
• “between:20,30” -> (Similarity::Between, vec![“20”, “30”])