Defines a selector that takes a value x:T and number that represents the position of x in whichever sequence it is applied to and transforms that T into a TOut
x:T
x
T
TOut
{@link _map} Copy
{@link _map}
Defines a selector that takes a value
x:Tand number that represents the position ofxin whichever sequence it is applied to and transforms thatTinto aTOut