add JavaScript code for Stacks (untested)

src/javascript/stack.js

@@ -0,0 +1,55 @@
+/*
+IPseudoADS Stack
+Pseudocode-like advanced stack management for JavaScript
+
+by buzz-ligthsnack-2007
+*/
+
+class Stack {
+  #contents = [];
+  #max;
+
+  /*
+  Create a new stack.
+
+  @param {int} size stack’s size
+  */
+  constructor(size) {
+    if (size ? size > 0 : false) {
+      this.#max = size;
+    };
+  };
+
+  /*
+  Add an item to the top of the stack.
+
+  @param {Object} data the data to be added
+  */
+  push(data) {
+    if ((this.#max != null) ? this.#max == this.#contents.length : false) {
+      throw new RangeError();
+    } else {
+      this.#contents.push(data);
+    }
+  };
+
+  /*
+  Remove and return the object at the top of the stack.
+
+  @return {Object} the data removed
+  */
+  pop() {
+    return(this.#contents.pop());
+  };
+
+  /*
+  Test: stack contains no elements
+
+  @return {bool} test result
+  */
+  isEmpty() {
+    return(this.#contents.length == 0);
+  }
+}
+
+export {Stack as default};