Add installation steps for Go and JavaScript.

codes/javascript/chapter_stack_and_queue/stack.js

@@ -14,15 +14,21 @@ stack.push(3);
 stack.push(2);
 stack.push(5);
 stack.push(4);
+console.log("栈 stack =", stack)
 
 /* 访问栈顶元素 */
 const peek = stack[stack.length - 1];
+console.log("栈顶元素 peek =", peek)
 
 /* 元素出栈 */
 const pop = stack.pop();
+console.log("出栈元素 pop =", pop)
+console.log("出栈后 stack =", stack)
 
 /* 获取栈的长度 */
 const size = stack.length;
+console.log("栈的长度 size =", size)
 
 /* 判断是否为空 */
 const is_empty = stack.length === 0;
+console.log("栈是否为空 =", is_empty)