Defines a predicate that takes a value x:T and number that represents the position of x in whichever sequence it is applied to and returns a truthy/falsy value, usually to signal inclusion in an output list
x:T
x
{@link _filter} Copy
{@link _filter}
Defines a predicate that takes a value
x:Tand number that represents the position ofxin whichever sequence it is applied to and returns a truthy/falsy value, usually to signal inclusion in an output list