JavaScript: Set.prototype.has
New in JS2015.
set_obj.has(value)
-
Return
true
if value is in set. Else,false
.
const s = new Set([3,4,5]); // check existence console.log( s.has (5) ); // true console.log( s.has (99) ); // false
New in JS2015.
set_obj.has(value)
true
if value is in set. Else, false
.
const s = new Set([3,4,5]); // check existence console.log( s.has (5) ); // true console.log( s.has (99) ); // false