showing results for - "hashset in javascript"
Isabella
18 Sep 2017
1// Use to remove duplicate elements from the array 
2
3const numbers = [2,3,4,4,2,3,3,4,4,5,5,6,6,7,5,32,3,4,5]
4
5//spreading numbers of the object into an array using the new operator
6console.log([...new Set(numbers)]) 
7
8// [2, 3, 4, 5, 6, 7, 32]
Shaima
16 Jun 2018
1let mySet = new Set()
2
3mySet.add(1)           // Set [ 1 ]
4mySet.add(5)           // Set [ 1, 5 ]
5mySet.add(5)           // Set [ 1, 5 ]
6mySet.add('some text') // Set [ 1, 5, 'some text' ]
7let o = {a: 1, b: 2}
8mySet.add(o)
9
10mySet.add({a: 1, b: 2})   // o is referencing a different object, so this is okay
11
12mySet.has(1)              // true
13mySet.has(3)              // false, since 3 has not been added to the set
14mySet.has(5)              // true
15mySet.has(Math.sqrt(25))  // true
16mySet.has('Some Text'.toLowerCase()) // true
17mySet.has(o)       // true
18
19mySet.size         // 5
20
21mySet.delete(5)    // removes 5 from the set
22mySet.has(5)       // false, 5 has been removed
23
24mySet.size         // 4, since we just removed one value
25
26console.log(mySet)
27// logs Set(4) [ 1, "some text", {…}, {…} ] in Firefox
28// logs Set(4) { 1, "some text", {…}, {…} } in Chrome
29
Apolline
12 Apr 2017
1let mySet = new Set()
2
3mySet.add(1)           // Set [ 1 ]
4mySet.add(5)           // Set [ 1, 5 ]
5mySet.add(5)           // Set [ 1, 5 ]
6mySet.add('some text') // Set [ 1, 5, 'some text' ]
7let o = {a: 1, b: 2}
8mySet.add(o)
9
10mySet.add({a: 1, b: 2})   // o is referencing a different object, so this is okay
11
12mySet.has(1)              // true
13mySet.has(3)              // false, since 3 has not been added to the set
14mySet.has(5)              // true
15mySet.has(Math.sqrt(25))  // true
16mySet.has('Some Text'.toLowerCase()) // true
17mySet.has(o)       // true
18
19mySet.size         // 5
20
21mySet.delete(5)    // removes 5 from the set
22mySet.has(5)       // false, 5 has been removed
23
24mySet.size         // 4, since we just removed one value
25
26console.log(mySet)
27// logs Set(4) [ 1, "some text", {…}, {…} ] in Firefox
28// logs Set(4) { 1, "some text", {…}, {…} } in Chrome
29
Jana
24 Jan 2018
1// set is used for storing unique values
2const firstSet = new Set([1, 2, 3]);
3
4firstSet.add('hi'); //adding value to set
5
6firstSet.add(3); //this will not give any error and it will also not be added
7
8firstSet.delete('hi');//removing value from set
9
10console.log(firstSet.has('hi'));//checking 'hi' is in the set or not
11
12// showing all values in the set
13console.log(firstSet);
14for (const entry of firstSet.values()) {
15    console.log(entry);
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