javascript - Explanation of Code - I think it's Lambda expression -


it's been long since have been programmer ask stupid questions. have not new techniques make me pretty old fashioned programmer. example following code, remove cookies. 

var cookies = document.cookie.split(';'); (var = 0; < cookies.length; i++) {     var cookie = cookies[i];     var eqpos = cookie.indexof('=');     var name = eqpos > -1 ? cookie.substr(0, eqpos) : cookie;     document.cookie = name + '=;expires=thu, 01 jan 1970 00:00:00 gmt'; }

in there doing this

eqpos > -1 ? cookie.substr(0, eqpos) : cookie;

i don't know happening here. please explain. , type of notation , need learn understand it.

it short if statment, condition 

eqpos > -1

name be:

cookie.substr(0, eqpos)

if condition true:

and 

cookie

if false


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