Iterates a string array with each : Syntax error, unrecognized expression (JQuery 2.1.3)

Iterates a string array with each : Syntax error, unrecognized expression (JQuery 2.1.3)

Hi,

I'm trying to iterate a simple array of string with something like $(MyArray).each but it gives me the error Syntax error, unrecognized expression.  Who knows what I'm doing wrong ?  See image below

See attached image