 class="sortli listnum3"><a href="#isZip">isZip</a><span class="typeInfo"> (zip:String) : Boolean</span><ul class="summary"><li>Determines if numbers in string are a valid US zip code length.</li></ul></li><li class="sortli listnum4"><a href="#isStateAbbreviation">isStateAbbreviation</a><span class="typeInfo"> (state:String) : Boolean</span><ul class="summary"><li>Determines if string is a valid state abbreviation.</li></ul></li><li class="sortli listnum5"><a href="#contains">contains</a><span class="typeIn