implements selection sort

c/arraylist.c

@@ -12,7 +12,9 @@ i32_ArrayList *new_arraylist(int cap) {
     i32_ArrayList *arr = malloc(sizeof(i32_ArrayList) + cap * sizeof(int));
 
     if (arr == NULL) {
-        printf("ERROR: there was an error attemping to allocate memory for i32_ArrayList\n");
+        printf(
+            "ERROR: there was an error attemping to allocate memory for "
+            "i32_ArrayList\n");
         exit(1);
     }
 
@@ -32,7 +34,8 @@ void do_append(i32_ArrayList *s, int v) {
 i32_ArrayList *resize_arraylist(i32_ArrayList *arr) {
     int new_cap = arr->capacity * 2;
 
-    i32_ArrayList *new_arr = (i32_ArrayList *)realloc(arr, (sizeof(int) * new_cap) + sizeof(i32_ArrayList));
+    i32_ArrayList *new_arr = (i32_ArrayList *)realloc(
+        arr, (sizeof(int) * new_cap) + sizeof(i32_ArrayList));
 
     if (new_arr == NULL) {
         fprintf(stderr, "ERROR: unable to resize array\n");
@@ -66,8 +69,9 @@ i32_ArrayList *new_arraylist_from_array(int cap, int *arr) {
 }
 
 // insert value at index
-// the strategy here is to start from the last element in the array and shift it to the right
-// gotta be careful and check that the index + 1 <= capacity otherwise we are in trouble
+// the strategy here is to start from the last element in the array and shift it
+// to the right gotta be careful and check that the index + 1 <= capacity
+// otherwise we are in trouble
 void array_insert_at(i32_ArrayList *arr, int at_index, int32_t value) {
     if (at_index == arr->index) {
         do_append(arr, value);
@@ -75,8 +79,11 @@ void array_insert_at(i32_ArrayList *arr, int at_index, int32_t value) {
 
     // TODO: eh this should be much better
     if (at_index + 1 > arr->capacity) {
-        printf("ERROR: this insert is not possible since the shift required would be over the capacity of the array\n");
-        printf("You requested insert at %d but array capacity is set to %d\n", at_index, arr->capacity);
+        printf(
+            "ERROR: this insert is not possible since the shift required "
+            "would be over the capacity of the array\n");
+        printf("You requested insert at %d but array capacity is set to %d\n",
+               at_index, arr->capacity);
     }
 
     for (int i = arr->index; i >= at_index; i--) {

c/binary-search.c

@@ -32,7 +32,7 @@ bool binary_search(int *arr, int len, int val) {
 }
 
 int main() {
-    int  arr[8] = {1, 3, 4, 5, 6, 7, 8, 11};
+    int  arr[8] = {1, 3, 4, 5, 6, 7, 8, 10};
     bool result = binary_search(arr, 8, 11);
     printf("the result is %s\n", result ? "true" : "false");
 }

c/bubble-sort-take-2.c

@@ -0,0 +1,45 @@
+#include <stdio.h>
+
+/*
+in bubble sort we iterate through the array each time we encounter adjacent elements
+out of order, we swap them. We continue this iteration until we have reached
+ */
+
+void swap(int *a, int *b) {
+    int temp = *a;
+    *a = *b;
+    *b = temp;
+}
+
+void bubble_sort(int arr[], int len) {
+    int swap_count = 1;
+    int temp;
+    int end_index = len - 1;
+
+    while (swap_count > 0) {
+        swap_count = 0;
+        for (int i = 0; i < end_index; i++) {
+            if (arr[i] > arr[i + 1]) {
+                temp = arr[i];
+                arr[i] = arr[i + 1];
+                arr[i + 1] = temp;
+                swap_count++;
+            }
+        }
+        end_index--;
+    }
+}
+
+void print_array(int arr[], int len) {
+    printf("[ ");
+    for (int i = 0; i < len; i++) {
+        printf(" %d", arr[i]);
+    }
+    printf(" ]\n");
+}
+
+int main() {
+    int input[5] = {5, 4, 3, 2, 1};
+    bubble_sort(input, 5);
+    print_array(input, 5);
+}

c/ordered-arrays.c

@@ -17,6 +17,7 @@ typedef struct FixedOrderedArray {
     int data[];
 } FixedOrderedArray;
 
+
 FixedOrderedArray *new_fixed_ordered_array(int capacity) {
     FixedOrderedArray *arr = malloc(sizeof(FixedOrderedArray) + (sizeof(int) * capacity));
     arr->capacity = capacity;
@@ -85,6 +86,7 @@ void print_array_list(FixedOrderedArray *arr) {
     for (int i = 0; i < arr->index; i++) {
         printf(" %d ", arr->data[i]);
     }
+
     printf("]\t<capacity: %d; index: %d>\n", arr->capacity, arr->index);
 }
 

c/selection-sort.c

@@ -0,0 +1,37 @@
+#include <stdio.h>
+
+void swap(int *a, int *b) {
+    int temp = *a;
+    *a = *b;
+    *b = temp;
+}
+
+void selection_sort(int arr[], int len) {
+    int curr_low;
+    int low_index = 0;
+    int pass_index = 0;
+
+    for (int i = 0; i < len; i++) {
+        low_index = i;
+        for (int j = i + 1; j < len; j++) {
+            if (arr[i] > arr[j]) {  // if we encounter a new low
+                low_index = j;
+            }
+        }
+        swap(&arr[i], &arr[low_index]);
+    }
+}
+
+void print_array(int arr[], int len) {
+    printf("[ ");
+    for (int i = 0; i < len; i++) {
+        printf("%d ", arr[i]);
+    }
+    printf("]\n");
+}
+
+int main() {
+    int arr[6] = {5, 3, 4, 2, 1, 7};
+    selection_sort(arr, 6);
+    print_array(arr, 6);
+}