nl_tokens: Wraps the given function fn with a new function that only invokes fn at most once per every wait milliseconds .
pl_tokens: function throttle ( fn , wait ) { var last = Date . now ( ) ; var throttled = function throttled ( ) { var now = Date . now ( ) ; if ( now - <mask> >= wait ) { fn . apply ( undefined , arguments ) ; last = now ; } } ; return throttled ; }