The set.add() function in JavaScript is used to insert an element in the set.
The image below shows the visual representation of the set.add() function:
In JavaScript, a set is a particular instance of a list in which all inputs are unique.
Note: If there are duplicates, the set will only keep the first instance. For example:
{'Tom','Alsvin','Eddie','Tom'}will result in{'Tom','Alsvin','Eddie'}.
set_name.add(element)
// where the set_name is the name of the set.
This function requires an element as a parameter.
This function inserts the element sent as a parameter in the set.
The code below shows how to use the set.add() function in JavaScript:
const set_1 = new Set(["Tom","Alsvin"]);//set containing value before insertconsole.log("set_1 elements before insert: ",set_1);//inserting element in setset_1.add("Eddie")//set containing value after insertconsole.log("set_1 elements after insert: ", set_1);//trying duplicate insertionset_1.add("Tom")//set containing value after duplicate insertionconsole.log("set_1 elements after duplicate insert: ", set_1);
Line 1: We create a set with two values {'Tom','Alsvin'} and name it set_1.
Line 6: We add a new element Eddie in set_1 using the add() method.
Line 11: If we try to add a duplicate name, for example, Tom, then it ignores it and returns the same set.