Merge pull request #354 from simrantyagi01/feature/my-feature

Add searching_sorting.py and test_searching_sorting.py

Tests/algorithms/test_searching_sorting.py

@@ -0,0 +1,65 @@
+import unittest
+from searching_sorting import linear_search, binary_search, jump_search, exponential_search
+from searching_sorting import bubble_sort, selection_sort, insertion_sort, merge_sort, quick_sort, heap_sort, counting_sort, radix_sort
+
+class TestAlgorithms(unittest.TestCase):
+
+    # Searching Algorithms Test Cases
+
+    def test_linear_search(self):
+        arr = [5, 2, 9, 1, 5, 6]
+        self.assertEqual(linear_search(arr, 9), 2)
+        self.assertEqual(linear_search(arr, 10), -1)
+
+    def test_binary_search(self):
+        arr = [1, 2, 5, 5, 6, 9]
+        self.assertEqual(binary_search(arr, 9), 5)
+        self.assertEqual(binary_search(arr, 10), -1)
+
+    def test_jump_search(self):
+        arr = [1, 2, 5, 5, 6, 9]
+        self.assertEqual(jump_search(arr, 9), 5)
+        self.assertEqual(jump_search(arr, 10), -1)
+
+    def test_exponential_search(self):
+        arr = [1, 2, 5, 5, 6, 9]
+        self.assertEqual(exponential_search(arr, 9), 5)
+        self.assertEqual(exponential_search(arr, 10), -1)
+
+    # Sorting Algorithms Test Cases
+
+    def test_bubble_sort(self):
+        arr = [5, 2, 9, 1, 5, 6]
+        self.assertEqual(bubble_sort(arr), [1, 2, 5, 5, 6, 9])
+
+    def test_selection_sort(self):
+        arr = [5, 2, 9, 1, 5, 6]
+        self.assertEqual(selection_sort(arr), [1, 2, 5, 5, 6, 9])
+
+    def test_insertion_sort(self):
+        arr = [5, 2, 9, 1, 5, 6]
+        self.assertEqual(insertion_sort(arr), [1, 2, 5, 5, 6, 9])
+
+    def test_merge_sort(self):
+        arr = [5, 2, 9, 1, 5, 6]
+        self.assertEqual(merge_sort(arr), [1, 2, 5, 5, 6, 9])
+
+    def test_quick_sort(self):
+        arr = [5, 2, 9, 1, 5, 6]
+        self.assertEqual(quick_sort(arr), [1, 2, 5, 5, 6, 9])
+
+    def test_heap_sort(self):
+        arr = [5, 2, 9, 1, 5, 6]
+        self.assertEqual(heap_sort(arr), [1, 2, 5, 5, 6, 9])
+
+    def test_counting_sort(self):
+        arr = [5, 2, 9, 1, 5, 6]
+        self.assertEqual(counting_sort(arr), [1, 2, 5, 5, 6, 9])
+
+    def test_radix_sort(self):
+        arr = [170, 45, 75, 90, 802, 24, 2, 66]
+        self.assertEqual(radix_sort(arr), [2, 24, 45, 66, 75, 90, 170, 802])
+
+
+if __name__ == "__main__":
+    unittest.main()

pysnippets/Searching_Sorting/searching_sorting.py

@@ -0,0 +1,205 @@
+# Searching Algorithms
+
+def linear_search(arr, target):
+    """Linear Search: Search for a target in a list"""
+    for i, value in enumerate(arr):
+        if value == target:
+            return i
+    return -1
+
+
+def binary_search(arr, target):
+    """Binary Search: Search for a target in a sorted list"""
+    left, right = 0, len(arr) - 1
+    while left <= right:
+        mid = (left + right) // 2
+        if arr[mid] == target:
+            return mid
+        elif arr[mid] < target:
+            left = mid + 1
+        else:
+            right = mid - 1
+    return -1
+
+
+def jump_search(arr, target):
+    """Jump Search: Search for a target in a sorted list"""
+    n = len(arr)
+    step = int(n ** 0.5)
+    prev, curr = 0, 0
+    while curr < n and arr[curr] < target:
+        prev = curr
+        curr = min(curr + step, n - 1)
+    for i in range(prev, curr + 1):
+        if arr[i] == target:
+            return i
+    return -1
+
+
+def exponential_search(arr, target):
+    """Exponential Search: Search for a target in a sorted list"""
+    if arr[0] == target:
+        return 0
+    i = 1
+    while i < len(arr) and arr[i] <= target:
+        i *= 2
+    return binary_search(arr[i // 2:min(i, len(arr))], target)
+
+
+# Sorting Algorithms
+
+def bubble_sort(arr):
+    """Bubble Sort: Sort an array using bubble sort"""
+    n = len(arr)
+    for i in range(n):
+        for j in range(0, n-i-1):
+            if arr[j] > arr[j+1]:
+                arr[j], arr[j+1] = arr[j+1], arr[j]
+    return arr
+
+
+def selection_sort(arr):
+    """Selection Sort: Sort an array using selection sort"""
+    n = len(arr)
+    for i in range(n):
+        min_index = i
+        for j in range(i + 1, n):
+            if arr[j] < arr[min_index]:
+                min_index = j
+        arr[i], arr[min_index] = arr[min_index], arr[i]
+    return arr
+
+
+def insertion_sort(arr):
+    """Insertion Sort: Sort an array using insertion sort"""
+    for i in range(1, len(arr)):
+        key = arr[i]
+        j = i - 1
+        while j >= 0 and arr[j] > key:
+            arr[j + 1] = arr[j]
+            j -= 1
+        arr[j + 1] = key
+    return arr
+
+
+def merge_sort(arr):
+    """Merge Sort: Sort an array using merge sort"""
+    if len(arr) > 1:
+        mid = len(arr) // 2
+        left_half = arr[:mid]
+        right_half = arr[mid:]
+
+        merge_sort(left_half)
+        merge_sort(right_half)
+
+        i = j = k = 0
+        while i < len(left_half) and j < len(right_half):
+            if left_half[i] < right_half[j]:
+                arr[k] = left_half[i]
+                i += 1
+            else:
+                arr[k] = right_half[j]
+                j += 1
+            k += 1
+
+        while i < len(left_half):
+            arr[k] = left_half[i]
+            i += 1
+            k += 1
+
+        while j < len(right_half):
+            arr[k] = right_half[j]
+            j += 1
+            k += 1
+    return arr
+
+
+def quick_sort(arr):
+    """Quick Sort: Sort an array using quick sort"""
+    if len(arr) <= 1:
+        return arr
+    pivot = arr[len(arr) // 2]
+    left = [x for x in arr if x < pivot]
+    middle = [x for x in arr if x == pivot]
+    right = [x for x in arr if x > pivot]
+    return quick_sort(left) + middle + quick_sort(right)
+
+
+def heap_sort(arr):
+    """Heap Sort: Sort an array using heap sort"""
+    def heapify(arr, n, i):
+        largest = i
+        left = 2 * i + 1
+        right = 2 * i + 2
+        if left < n and arr[left] > arr[largest]:
+            largest = left
+        if right < n and arr[right] > arr[largest]:
+            largest = right
+        if largest != i:
+            arr[i], arr[largest] = arr[largest], arr[i]
+            heapify(arr, n, largest)
+
+    n = len(arr)
+    for i in range(n // 2 - 1, -1, -1):
+        heapify(arr, n, i)
+
+    for i in range(n - 1, 0, -1):
+        arr[i], arr[0] = arr[0], arr[i]
+        heapify(arr, i, 0)
+
+    return arr
+
+
+def counting_sort(arr):
+    """Counting Sort: Sort an array using counting sort"""
+    if not arr:
+        return arr
+    max_val = max(arr)
+    min_val = min(arr)
+    range_of_elements = max_val - min_val + 1
+    count = [0] * range_of_elements
+    output = [0] * len(arr)
+
+    for num in arr:
+        count[num - min_val] += 1
+
+    for i in range(1, range_of_elements):
+        count[i] += count[i - 1]
+
+    for num in reversed(arr):
+        output[count[num - min_val] - 1] = num
+        count[num - min_val] -= 1
+
+    return output
+
+
+def radix_sort(arr):
+    """Radix Sort: Sort an array using radix sort"""
+    def counting_sort_for_radix(arr, exp):
+        n = len(arr)
+        output = [0] * n
+        count = [0] * 10
+
+        for i in range(n):
+            index = arr[i] // exp
+            count[index % 10] += 1
+
+        for i in range(1, 10):
+            count[i] += count[i - 1]
+
+        i = n - 1
+        while i >= 0:
+            index = arr[i] // exp
+            output[count[index % 10] - 1] = arr[i]
+            count[index % 10] -= 1
+            i -= 1
+
+        for i in range(n):
+            arr[i] = output[i]
+
+    max_num = max(arr)
+    exp = 1
+    while max_num // exp > 0:
+        counting_sort_for_radix(arr, exp)
+        exp *= 10
+    return arr