Cohort4.2
/
ArraysGoneWild
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done

thulasi 6 years ago
parent
e5f58ab730
commit
ce3eb6adc1
4 changed files with 358 additions and 64 deletions
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  1. 1
    1
      .idea/compiler.xml
  2. 77
    56
      .idea/workspace.xml
  3. 115
    7
      arraz/src/main/java/Arraz.java
  4. 165
    0
      arraz/src/test/java/ArrazTest.java

+ 1
- 1
.idea/compiler.xml View File 

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+ 77
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.idea/workspace.xml View File 

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@@ -314,7 +321,7 @@
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@@ -336,22 +343,22 @@
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       </method>
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-    <configuration name="ArrazTest.test1CopyArrayByInterator" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
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340 347 
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-      <option name="METHOD_NAME" value="test1CopyArrayByInterator" />
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-    <configuration name="ArrazTest.test1RemoveDupesFromArray" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
357 
+    <configuration name="ArrazTest.test1RemoveLastItemAndCopy" type="JUnit" factoryName="JUnit" temporary="true" nameIsGenerated="true">
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@@ -369,6 +376,17 @@
369 376 
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@@ -394,16 +412,18 @@
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       <item itemvalue="JUnit.ArrazTest.test1RemoveDupesFromArray" />
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+ 115
- 7
arraz/src/main/java/Arraz.java View File 

@@ -123,9 +123,19 @@ public class Arraz {
123 123 
     }
124 124
125 125 
     public int[] removeDupesFromArray(int[] arr) {
126 
-       // ArrayList<Integer> list = new ArrayList<Integer>(Arrays.asList(arr));
127 
-       // return newArr;
128 
-        return null;
126 
+        ArrayList<Integer> list = new ArrayList<>();
127 
+        for(int n : arr) {
128 
+            if(!list.contains(n))
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+                list.add(n);
130 
+        }
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+        arr = new int[list.size()];
132 
+        int index = 0;
133 
+        for(int n : list) {
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+            arr[index] = list.get(index);
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+            index++;
136 
+        }
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+        //return newArr;
138 
+        return arr;
129 139 
     }
130 140
131 141 
     public int find2ndLargestValueFromArray(int[] arr) {
 
@@ -182,11 +192,109 @@ public class Arraz {
182 192 
     }
183 193
184 194 
     public boolean arrayHas65and77(int[] arr) {
185 
-        for(int n : arr) {
186 
-            if (n != 65 || n != 77)
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-                return false;
195 
+        ArrayList<Integer> list = new ArrayList<>();
196 
+        for(int n : arr)
197 
+            list.add(n);
198 
+
199 
+        if(list.contains(65) && list.contains(77))
200 
+            return true;
201 
+        else return false;
202 
+    }
203 
+
204 
+
205 
+    public boolean theTotalofTensIs30(int[] arr) {
206 
+        int sum = 0;
207 
+        for(int n : arr){
208 
+            if(n == 10)
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+                sum += n;
188 210 
         }
189 
-        return true;
211 
+
212 
+        if(sum == 30)
213 
+            return true;
214 
+        else return false;
215 
+    }
216 
+
217 
+    public int[] smallestAndSecondSmallest(int[] arr) {
218 
+        int smallest = Integer.MAX_VALUE;
219 
+        int secondSmallest = smallest;
220 
+        for(int n : arr){
221 
+            if(n < smallest) {
222 
+                secondSmallest = smallest;
223 
+                smallest = n;
224 
+            }
225 
+            else if(n < secondSmallest)
226 
+                secondSmallest = smallest;
227 
+        }
228 
+       return new int[]{smallest, secondSmallest};
229 
+    }
230 
+
231 
+    public int[] makeMeACopyPlease(int[] arr) {
232 
+        int[] cpyArr = Arrays.copyOf(arr,arr.length);
233 
+        int[] revArr = new int[cpyArr.length];
234 
+        int index = 0;
235 
+        for(int i = arr.length - 1; i >= 0; i--){
236 
+            revArr[index] = arr[i];
237 
+            index++;
238 
+        }
239 
+        return revArr;
190 240 
     }
191 241
242 
+    public int[] removeLastItemAndCopy(int[] arr) {
243 
+        int[] newArr = new int[arr.length-1];
244 
+        for(int i = 0;i<arr.length-1;i++){
245 
+            newArr[i] = arr[i];
246 
+        }
247 
+        return newArr;
248 
+    }
249 
+
250 
+    public int[] removeFirstItemAndCopy(int[] arr) {
251 
+        int[] newArr = new int[arr.length-1];
252 
+
253 
+        for(int i = 1; i<arr.length; i++){
254 
+            newArr[i-1] = arr[i];
255 
+        }
256 
+        return newArr;
257 
+    }
258 
+
259 
+    public int[] insertAtStartAndCopy(int[] arr, int n) {
260 
+        int[] newArr = new int[arr.length+1];
261 
+        newArr[0] = n;
262 
+        for(int i = 0; i<arr.length; i++){
263 
+            newArr[i+1] = arr[i];
264 
+        }
265 
+        return newArr;
266 
+    }
267 
+
268 
+    public int[] insertAtEndAndCopy(int[] arr, int n) {
269 
+        int[] newArr = new int[arr.length+1];
270 
+        newArr[newArr.length-1] = n;
271 
+        for(int i = 0; i<arr.length; i++){
272 
+            newArr[i] = arr[i];
273 
+        }
274 
+        return newArr;
275 
+    }
276 
+
277 
+    public int[] sortArrayIntoEvensThenOdds(int[] arr) {
278 
+        Arrays.sort(arr);
279 
+
280 
+        int[] sortedArr = new int[arr.length];
281 
+        List<Integer> evens = new ArrayList<>();
282 
+        List<Integer> odds = new ArrayList<>();
283 
+
284 
+        for(int i = 0;i<arr.length;i++){
285 
+            if(arr[i] %2 == 0)
286 
+                evens.add(arr[i]);
287 
+            else
288 
+                odds.add(arr[i]);
289 
+        }
290 
+
291 
+        evens.addAll(odds);
292 
+        for(int i = 0;i<arr.length;i++){
293 
+            sortedArr[i] = evens.get(i);
294 
+        }
295 
+
296 
+        return sortedArr;
297 
+    }
298 
+
299 
+
192 300 
 }

+ 165
- 0
arraz/src/test/java/ArrazTest.java View File 

@@ -382,4 +382,169 @@ public class ArrazTest {
382 382 
                 boolean actual = arraz.arrayHas65and77(arr);
383 383 
                 Assert.assertEquals(expected, actual);
384 384 
             }
385 
+
386 
+            @Test
387 
+            public void test1TheTotalofTensIs30(){
388 
+                int[] arr = new int[]{65,10,9,10, 10,77};
389 
+                boolean expected = true;
390 
+                boolean actual = arraz.theTotalofTensIs30(arr);
391 
+                Assert.assertEquals(expected, actual);
392 
+            }
393 
+
394 
+            @Test
395 
+            public void test2TheTotalofTensIs30(){
396 
+                int[] arr = new int[]{51,83,96, 10};
397 
+                boolean expected = false;
398 
+                boolean actual = arraz.theTotalofTensIs30(arr);
399 
+                Assert.assertEquals(expected, actual);
400 
+            }
401 
+
402 
+            @Test
403 
+            public void test1FindSmallestAndSecondSmallest(){
404 
+                int[] arr = new int[]{5,3,1,8};
405 
+                int[] expected = {1,3};
406 
+                int[] actual = arraz.smallestAndSecondSmallest(arr);
407 
+                Assert.assertEquals(expected.length, actual.length);
408 
+                Assert.assertEquals(expected[0], actual[0]);
409 
+                Assert.assertEquals(expected[1], actual[1]);
410 
+            }
411 
+
412 
+            @Test
413 
+            public void test2FindSmallestAndSecondSmallest(){
414 
+                int[] arr = new int[]{50,9,13,5,8};
415 
+                int[] expected = {5, 9};
416 
+                int[] actual = arraz.smallestAndSecondSmallest(arr);
417 
+                Assert.assertEquals(expected.length, actual.length);
418 
+            }
419 
+
420 
+            @Test
421 
+            public void test1MakeMeACopyPlease(){
422 
+                int[] arr = new int[]{5,3,1};
423 
+                int[] expected = {1,3,5};
424 
+                int[] actual = arraz.makeMeACopyPlease(arr);
425 
+                Assert.assertEquals(expected.length, actual.length);
426 
+                Assert.assertEquals(expected[0], actual[0]);
427 
+                Assert.assertEquals(expected[1], actual[1]);
428 
+                Assert.assertEquals(expected[2], actual[2]);
429 
+            }
430 
+
431 
+            @Test
432 
+            public void test2MakeMeACopyPlease(){
433 
+                int[] arr = new int[]{50,9};
434 
+                int[] expected = {9, 50};
435 
+                int[] actual = arraz.makeMeACopyPlease(arr);
436 
+                Assert.assertEquals(expected.length, actual.length);
437 
+                Assert.assertEquals(expected[0], actual[0]);
438 
+                Assert.assertEquals(expected[1], actual[1]);
439 
+            }
440 
+
441 
+            @Test
442 
+            public void test1RemoveLastItemAndCopy(){
443 
+                int[] arr = new int[]{5,3,1,6};
444 
+                int[] expected = {5,3,1};
445 
+                int[] actual = arraz.removeLastItemAndCopy(arr);
446 
+                Assert.assertEquals(expected.length, actual.length);
447 
+                Assert.assertEquals(expected[0], actual[0]);
448 
+                Assert.assertEquals(expected[1], actual[1]);
449 
+                Assert.assertEquals(expected[2], actual[2]);
450 
+            }
451 
+
452 
+            @Test
453 
+            public void test2RemoveLastItemAndCopy(){
454 
+                int[] arr = new int[]{50,9, 8};
455 
+                int[] expected = {50, 9};
456 
+                int[] actual = arraz.removeLastItemAndCopy(arr);
457 
+                Assert.assertEquals(expected.length, actual.length);
458 
+                Assert.assertEquals(expected[0], actual[0]);
459 
+                Assert.assertEquals(expected[1], actual[1]);
460 
+            }
461 
+
462 
+            @Test
463 
+            public void test1RemoveFirstItemAndCopy(){
464 
+                int[] arr = new int[]{5,3,1,6};
465 
+                int[] expected = {3,1, 6};
466 
+                int[] actual = arraz.removeFirstItemAndCopy(arr);
467 
+                Assert.assertEquals(expected.length, actual.length);
468 
+                Assert.assertEquals(expected[0], actual[0]);
469 
+                Assert.assertEquals(expected[1], actual[1]);
470 
+                Assert.assertEquals(expected[2], actual[2]);
471 
+            }
472 
+
473 
+            @Test
474 
+            public void test2RemoveFirstItemAndCopy(){
475 
+                int[] arr = new int[]{50,9, 8};
476 
+                int[] expected = {9, 8};
477 
+                int[] actual = arraz.removeFirstItemAndCopy(arr);
478 
+                Assert.assertEquals(expected.length, actual.length);
479 
+                Assert.assertEquals(expected[0], actual[0]);
480 
+                Assert.assertEquals(expected[1], actual[1]);
481 
+            }
482 
+
483 
+            @Test
484 
+            public void test1InsertAtStartAndCopy(){
485 
+                int[] arr = new int[]{50,9, 8};
486 
+                int[] expected = {3,50,9, 8};
487 
+                int[] actual = arraz.insertAtStartAndCopy(arr, 3);
488 
+                Assert.assertEquals(expected.length, actual.length);
489 
+                Assert.assertEquals(expected[0], actual[0]);
490 
+                Assert.assertEquals(expected[1], actual[1]);
491 
+                Assert.assertEquals(expected[2], actual[2]);
492 
+                Assert.assertEquals(expected[3], actual[3]);
493 
+            }
494 
+
495 
+            @Test
496 
+            public void test2InsertAtStartAndCopy(){
497 
+                int[] arr = new int[]{98, 34};
498 
+                int[] expected = {73,98,34};
499 
+                int[] actual = arraz.insertAtStartAndCopy(arr, 73);
500 
+                Assert.assertEquals(expected.length, actual.length);
501 
+                Assert.assertEquals(expected[0], actual[0]);
502 
+                Assert.assertEquals(expected[1], actual[1]);
503 
+                Assert.assertEquals(expected[2], actual[2]);
504 
+            }
505 
+
506 
+            @Test
507 
+            public void test1InsertAtEndAndCopy(){
508 
+                int[] arr = new int[]{50,9, 8};
509 
+                int[] expected = {50,9, 8, 3};
510 
+                int[] actual = arraz.insertAtEndAndCopy(arr, 3);
511 
+                Assert.assertEquals(expected.length, actual.length);
512 
+                Assert.assertEquals(expected[0], actual[0]);
513 
+                Assert.assertEquals(expected[1], actual[1]);
514 
+                Assert.assertEquals(expected[2], actual[2]);
515 
+                Assert.assertEquals(expected[3], actual[3]);
516 
+            }
517 
+
518 
+            @Test
519 
+            public void test2InsertAtEndAndCopy(){
520 
+                int[] arr = new int[]{98, 34};
521 
+                int[] expected = {98,34,73};
522 
+                int[] actual = arraz.insertAtEndAndCopy(arr, 73);
523 
+                Assert.assertEquals(expected.length, actual.length);
524 
+                Assert.assertEquals(expected[0], actual[0]);
525 
+                Assert.assertEquals(expected[1], actual[1]);
526 
+                Assert.assertEquals(expected[2], actual[2]);
527 
+            }
528 
+
529 
+            @Test
530 
+            public void test1SortArrayIntoEvensThenOdds(){
531 
+               int[] arr = new int[]{5,3,1,6,4};
532 
+               int[] expected = {4,6,1,3,5};
533 
+               int[] actual = arraz.sortArrayIntoEvensThenOdds(arr);
534 
+               Assert.assertEquals(expected.length, actual.length);
535 
+               Assert.assertEquals(expected[0], actual[0]);
536 
+               Assert.assertEquals(expected[1], actual[1]);
537 
+               Assert.assertEquals(expected[2], actual[2]);
538 
+            }
539 
+
540 
+            @Test
541 
+            public void test2SortArrayIntoEvensThenOdds(){
542 
+              int[] arr = new int[]{9,3,2,6};
543 
+              int[] expected = {2, 6, 3, 9};
544 
+              int[] actual = arraz.sortArrayIntoEvensThenOdds(arr);
545 
+              Assert.assertEquals(expected.length, actual.length);
546 
+              Assert.assertEquals(expected[0], actual[0]);
547 
+              Assert.assertEquals(expected[1], actual[1]);
548 
+              Assert.assertEquals(expected[2], actual[2]);
549 
+            }
385 550 
 }