Data commit

Task/Stack/JavaScript/stack-1.js

@@ -0,0 +1,5 @@
+var stack = [];
+stack.push(1)
+stack.push(2,3);
+print(stack.pop());   // 3
+print(stack.length);   // 2, stack empty if 0

Task/Stack/JavaScript/stack-2.js

@@ -0,0 +1,8 @@
+function Stack() {
+    this.data = new Array();
+
+    this.push  = function(element) {this.data.push(element)}
+    this.pop   = function() {return this.data.pop()}
+    this.empty = function() {return this.data.length == 0}
+    this.peek  = function() {return this.data[this.data.length - 1]}
+}

Task/Stack/JavaScript/stack-3.js

@@ -0,0 +1,24 @@
+function makeStack() {
+  var stack = [];
+
+  var popStack = function () {
+    return stack.pop();
+  };
+  var pushStack = function () {
+    return stack.push.apply(stack, arguments);
+  };
+  var isEmpty = function () {
+    return stack.length === 0;
+  };
+  var peekStack = function () {
+    return stack[stack.length-1];
+  };
+
+  return {
+    pop: popStack,
+    push: pushStack,
+    isEmpty: isEmpty,
+    peek: peekStack,
+    top: peekStack
+  };
+}