dsa_javascript/stack_que.html at main · prakash-dev-code/dsa_javascript · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Stack and que</title>
  </head>
  <body>
    <h1>Stack and Queue</h1>

    <script>
      // let name = "Prakash Sahu";
      // let stack = "";
      // for (let i = name.length - 1; i >= 0; i--) {
      //   stack += name[i];
      // }

      let name = "Prakash";
      let stack = [];

      // Push characters onto the stack
      for (let i = 0; i < name.length; i++) {
        stack.push(name[i]); // Stack stores characters in order
      }

      // Pop characters off the stack to reverse the order
      name = "";
      while (stack.length > 0) {
        name += stack.pop(); // LIFO: Last character out first
      }

      let array = [];

      let currentSize = array.length;
      let currentValue;

      function addValue(value) {
        array[currentSize] = value;
        currentSize++;
      }

      addValue(40);
      addValue(60);
      addValue(70);

      function removeValue() {
        if (currentSize === 0) {
          return;
        }

        currentSize--;

        currentValue = array[currentSize];

        array.length = currentSize;

        return currentValue;
      }
      removeValue();

      let users = ["Prakash", "Sahu", "Raj", "Kumar"];

      let userCount = users.length;
      // let userValue;

      function pushMethod(value) {
        users[userCount] = value;
        userCount++;
      }

      pushMethod("Rajesh");
      function popMethod() {
        if (userCount === 0) {
          return;
        }
        userCount--;
        let userValue = users[userCount];
        users.length = userCount;
        return userValue;
      }
      // removeValue();

      // console.log(array);

      popMethod();
      // console.log(users);

      // Reverse String
    </script>
  </body>
</html>