remove-duplicates-from-sorted-list/index.html at master · sauravhathi/remove-duplicates-from-sorted-list · 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
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <script src="https://cdn.tailwindcss.com"></script>
    <title>Remove All Occurrences of Duplicate from a Linked List</title>
  </head>

  <body>
    <nav
      class="flex items-center justify-between z-50 flex-wrap bg-white px-5 pt-1 pb-1 lg:px-20 sticky top-0 text-center border-b border-gray-200 shadow-sm"
    >
      <div class="flex items-center flex-shrink-0 text-slate-800 mr-6 p-2">
        <a href="">
          <img src="logo.png" class="mr-2 h-8 w-8" alt="Logo" />
        </a>
        <a href="/" class="font-bold text-xl text-blue-700"
          >Remove Duplicates from Sorted List</a
        >
      </div>
      <div class="lg:hidden">
        <div
          class="flex items-center px-3 py-2 border rounded text-slate-800 border-gray-200 hover:text-slate-500 hover:border-gray-500"
          onclick="toggleMenu()"
        >
          <svg
            class="fill-current h-3 w-3"
            viewBox="0 0 20 20"
            xmlns="http://www.w3.org/2000/svg"
          >
            <path d="M0 3h20v2H0V3zm0 6h20v2H0V9zm0 6h20v2H0v-2z" />
          </svg>
        </div>
      </div>
      <div
        id="menu"
        class="w-full hidden text-left lg:flex lg:items-center lg:w-auto"
      >
        <div class="text-md">
          <a
            href="/"
            class="block mt-4 lg:inline-block lg:mt-0 text-blue-700 hover:text-slate-500 font-semibold mr-4"
          >
            Home
          </a>
          <a
            href="#"
            class="block mt-4 lg:inline-block lg:mt-0 text-blue-700 hover:text-slate-500 font-semibold mr-4"
          >
            About
          </a>
          <a
            href="#"
            class="block mt-4 lg:inline-block lg:mt-0 text-blue-700 hover:text-slate-500 font-semibold mr-4"
          >
            Contact
          </a>
        </div>
      </div>
      <div id="github" class="hidden lg:flex">
        <a
          href="https://github.com/sauravhathi/find-middle-of-the-linked-list"
          class="inline-block font-bold px-4 py-3 leading-none rounded text-slate-50 hover:border-transparent bg-blue-700 hover:bg-blue-600 mt-4 lg:mt-0"
        >
          Github
        </a>
      </div>
    </nav>
    <div class="container mx-auto">
      <div class="flex justify-center h-screen mt-20">
        <div class="xl:w-1/3 lg:w-1/2 md:w-2/3 w-3/4">
          <div class="mb-10">
            <h1 class="text-2xl font-bold text-center text-blue-700">
              Remove All Occurrences of Duplicates from a Sorted Linked List
            </h1>
          </div>
          <div class="bg-blue-700 shadow-md rounded px-8 pt-6 pb-8 mb-4">
            <div class="mb-4">
              <label
                class="block text-white text-sm font-bold mb-2"
                for="list"
              >
                Enter the Sorted Linked List
              </label>
              <input
                class="shadow appearance-none border rounded w-full py-2 px-3 text-blue-700 leading-tight focus:outline-none focus:shadow-outline"
                id="list"
                name="list"
                type="text"
                placeholder="e.g. 1 2 3 3 4 4 5"
                onchange="reset()"
              />
              <p class="text-slate-50 text-xs italic" id="list-error"></p>
            </div>
            <div class="flex items-center justify-end">
              <button
                class="bg-white hover:bg-blue-600 text-slate-900 hover:text-white font-semibold py-2 px-4 hover:border-transparent rounded"
                type="submit"
                id="submit"
                onclick="removeDuplicate()"
              >
                Submit
              </button>
            </div>
            <div id="note">
              <h4 class="text-white text-md font-bold mt-4">
                Note:
              </h4>
              <p class="text-slate-50 text-sm">
                List should be sorted in ascending order.
              </p>
            </div>
            <div class="mt-4 text-left hidden" id="result-div">
              <hr class="border-pink-400" />
              <h1 class="text-xl text-white font-bold">Result</h1>
              <div class="mt-4">
                <p id="result"></p>
              </div>
            </div>
          </div>
        </div>
      </div>
    </div>
    <footer
      class="text-center text-sm p-4 bottom-0 border-t border-gray-200 w-full text-blue-700"
    >
      Made with ❤️ by
      <a href="https://github.com/sauravhathi/">Saurav Hathi</a>
    </footer>

    <script>
      // responsive menu bar
      function toggleMenu() {
        var menu = document.getElementById("menu");
        var github = document.getElementById("github");
        if (
          menu.classList.contains("hidden") &&
          github.classList.contains("hidden")
        ) {
          menu.classList.remove("hidden");
          github.classList.remove("hidden");
        } else {
          menu.classList.add("hidden");
          github.classList.add("hidden");
        }
      }

      // check if the list is sorted
      Array.prototype.isSorted = function () {
        let sort = this.slice(0);
        sort.sort((a, b) => a - b);

        return this.every((v, i) => v === sort[i]);

      };

      // get value from input
      function getList() {
        var list = document.getElementById("list").value;
        // remove beginning and ending spaces and split the string
        list = list.trim().split(" ");
        // if list is empty
        list = list.filter((item) => item !== "");

        return list;
      }

      // validate input
      function validateArray(list) {

        if (list.length == 0) {
          return false;
        }

        for (var i = 0; i < list.length; i++) {
          if (isNaN(list[i])) {
            return false;
          }
        }

        return true;
      }

      // onchange event of input
      function reset() {
        var list = getList();
        var listError = document.getElementById("list-error");
        var resultDiv = document.getElementById("result-div");
        var result = document.getElementById("result");
        var note = document.getElementById("note");

        // validate input
        if (!validateArray(list)) {
          listError.innerHTML = "Please enter a valid list";
          resultDiv.classList.add("hidden");
        }
        else if (!list.isSorted()) {
          listError.innerHTML = "List must be non-decreasing";
          resultDiv.classList.add("hidden");
        }
         else {
          listError.innerHTML = "";
          resultDiv.classList.add("hidden");
        }
      }

      class Node {
        constructor(data) {
          this.data = data;
          this.next = null;
        }
      }

      class LinkedList {
        constructor() {
          this.head = null;
          this.size = 0;
        }

        add(data) {
          var node = new Node(data);
          var current;

          if (this.head == null) {
            this.head = node;
          } else {
            current = this.head;

            while (current.next) {
              current = current.next;
            }

            current.next = node;
          }

          this.size++;
        }

        // remove all occurrences of duplicates from a sorted linked list
        removeDuplicates() {
          var current = this.head;
          var prev = null;
          while (current) {
            if (current.next && current.data == current.next.data) {
              var pivot = current;
              var newCurrent = current.next;
              while (newCurrent && pivot.data === newCurrent.data) {
                pivot.next = newCurrent.next;
                newCurrent = newCurrent.next;
              }
              if (prev) prev.next = pivot.next;
              else this.head = pivot.next;

              current = pivot.next;
            } else {
              prev = current;
              current = current.next;
            }
          }
          return this.head;
        }

        // print the linked list
        printList() {
          var current = this.head;
          var str = "";
          while (current) {
            str += current.data + " ";
            current = current.next;
          }
          return str;
        }
      }

      function removeDuplicate() {

        var list = getList();

        var listError = document.getElementById("list-error");
        var resultDiv = document.getElementById("result-div");
        var result = document.getElementById("result");

        // validate input
        if (!validateArray(list)) {
          listError.innerHTML = "Please enter a valid list";
          resultDiv.classList.add("hidden");
        }
        else if (!list.isSorted()) {
          listError.innerHTML = "List must be non-decreasing";
          resultDiv.classList.add("hidden");
        }
        else {
          listError.innerHTML = "";
          // create linked list
          var linkedList = new LinkedList();

          // add elements to the linked list
          for (var i = 0; i < list.length; i++) {
            linkedList.add(list[i]);
          }

        //   // divide the linked list into two parts
          var div = document.createElement("div");
          div.classList.add("grid", "grid-cols-1", "gap-2");

          // h1b element for the first part of the linked list (before removing duplicates)
          var h1b = document.createElement("h1");
          h1b.classList.add("text-md", "text-white", "font-semibold");
          h1b.innerHTML = "Before Removing Duplicates";
          div.appendChild(h1b);

          // ul element for the first part of the linked list (before removing duplicates)
          var ul = document.createElement("ul");
          ul.classList.add("flex", "flex-wrap", "gap-2");

          // li elements for the first part of the linked list (before removing duplicates)
          for (var i = 0; i < list.length; i++) {
            var li = document.createElement("li");
            li.classList.add(
              "flex",
              "items-center",
              "w-10",
              "h-10",
              "bg-blue-600",
              "rounded","justify-around",
              "text-white"
            );
            li.innerHTML = list[i];
            ul.appendChild(li);
          }

          // ul1 element for the second part of the linked list (after removing duplicates)
          var ul1 = document.createElement("ul");
          ul1.classList.add("flex", "flex-wrap", "gap-2");

          // remove duplicates from the linked list and store the head of the linked list in head variable after removing duplicates
          var current = linkedList.removeDuplicates();
          while (current) {
            var li = document.createElement("li");
            li.classList.add(
              "flex",
              "items-center",
              "w-10",
              "h-10",
              "bg-blue-600",
              "rounded", "justify-around", "text-white"
            );
            li.innerHTML = current.data;
            ul1.appendChild(li);
            current = current.next;
          }

          div.appendChild(ul);

          // h1a element for the second part of the linked list (after removing duplicates)
          var h1a = document.createElement("h1");
          h1a.classList.add("text-md", "text-white", "font-semibold");
          h1a.innerHTML = "After Removing Duplicates";
          div.appendChild(h1a);
          div.appendChild(ul1);
          result.innerHTML = "";
          result.appendChild(div);
          // show the result
          resultDiv.classList.remove("hidden");
        }
    }
    </script>
  </body>
</html>