Merge pull request #1 from LeuisKen/master

115 & 232

Author: LeuisKen

115.js

@@ -0,0 +1,34 @@
+function MinStack() {
+  var stackData = [],
+      stackMin = []
+
+  this.push = function(newNum) {
+    if(stackMin.length === 0 || newNum < this.getMin()) {
+      stackMin.push(newNum)
+    } else {
+      var newMin = this.getMin()
+      stackMin.push(newMin)
+    }
+    stackData.push(newNum)
+  }
+
+  this.pop = function() {
+    if(stackData.length === 0) {
+      throw new Error('Your stack is empty.')
+    }
+    stackMin.pop()
+    return stackData.pop()
+  }
+
+  this.getMin = function() {
+    var len = stackMin.length
+    if(len === 0) {
+      throw new Error('Your stack is empty.')
+    }
+    return stackMin[len - 1]
+  }
+
+  this.top = function() {
+      return stackData[stackData.length - 1]
+  }
+}

232.js

@@ -0,0 +1,34 @@
+function Queue() {
+  var stackPush = [],
+      stackPop = []
+
+  this.push = function(newNum) {
+    stackPush.push(newNum)
+  }
+
+  this.pop = function() {
+    if(stackPop.length === 0 && stackPush.length === 0) {
+      throw new Error('Queue is empty!')
+    } else if(stackPop.length === 0) {
+      while(stackPush.length !== 0) {
+        stackPop.push(stackPush.pop())
+      }
+    }
+    return stackPop.pop()
+  }
+
+  this.peek = function() {
+    if(stackPop.length === 0 && stackPush.length === 0) {
+      throw new Error('Queue is empty!')
+    } else if(stackPop.length === 0) {
+      while(stackPush.length !== 0) {
+        stackPop.push(stackPush.pop())
+      }
+    }
+    return stackPop[stackPop.length - 1]
+  }
+
+  this.empty = function() {
+    return stackPop.length === 0 && stackPush.length === 0
+  }
+}