update: initial Set implementation

Author: ashokdey

src/_DataStructures_/Set/index.js

@@ -0,0 +1,57 @@
+// XSet because ES6 already has a Set class
+class XSet {
+  constructor() {
+    this.data = {};
+  }
+
+  add(element) {
+    if (!this.data[element]) {
+      this.data[element] = true;
+    }
+  }
+
+  remove(element) {
+    if (this.data[element]) {
+      delete this.data[element];
+    }
+  }
+
+  has(element) {
+    return !!this.data[element];
+  }
+
+  values() {
+    return Object.keys(this.data);
+  }
+
+  union(givenSet) {
+    const result = new Set();
+    const firstSetValues = this.values();
+    const givenSetValues = givenSet.values();
+
+    // eslint-disable-next-line no-restricted-syntax
+    for (const e of firstSetValues) result.add(e);
+
+    // eslint-disable-next-line no-restricted-syntax
+    for (const e of givenSetValues) result.add(e);
+
+    return result;
+  }
+}
+
+// const s = new XSet();
+
+// s.add(10);
+// s.add(20);
+// s.add(90);
+
+// console.log(s.has(1));
+// console.log(s.has(10));
+// console.log(s.has(90));
+
+// console.log(s.values());
+// s.remove(90);
+// console.log(s.has(90));
+// console.log(s.data);
+
+module.exports = XSet;