add solution in JS for 0155_min_stack.js

Author: Saimon398

js_solutions/0155_min_stack.js

@@ -0,0 +1,43 @@
+/**
+ * @description Initialize stack as an array
+ */
+const MinStack = function () {
+  this.stack = [];
+};
+
+/**
+* @description Pushes element to the top of the stack
+* @param {Number} value
+* @return {Void}
+*/
+MinStack.prototype.push = function (value) {
+  const elem = { value, min: this.stack.length === 0 ? value : Math.min(value, this.getMin()) };
+  this.stack.push(elem);
+};
+
+/**
+* @description Returns element on the top of the stack and removes it
+* @return {Void}
+*/
+MinStack.prototype.pop = function () {
+  const { value } = this.stack.pop();
+  return value;
+};
+
+/**
+* @description Returns element on the top of the stack
+* @return {Number}
+*/
+MinStack.prototype.top = function () {
+  const { value } = this.stack[this.stack.length - 1];
+  return value;
+};
+
+/**
+* @description Returns the min element in the stack
+* @return {Number}
+*/
+MinStack.prototype.getMin = function () {
+  const { min } = this.stack[this.stack.length - 1];
+  return min;
+};