solve: Week 02 product of array except self

Author: eunice-hong

product-of-array-except-self/eunice-hong.ts

@@ -0,0 +1,37 @@
+function productExceptSelf(nums: number[]): number[] {
+  // Check if there are zeros in the array
+  const zeroCount = nums.reduce((acc, num) => {
+    if (num === 0) { 
+      return acc + 1;
+        } else {
+          return acc;
+        }
+    }, 0);
+
+    if (zeroCount === 0) {
+      // If there are no zeros, calculate the product of all numbers
+      const totalProduct = nums.reduce((acc, num) => num * acc, 1);
+      return nums.map((num) => {
+        return totalProduct / num;
+      });
+    } else if (zeroCount === 1) {
+      // If there is one zero, calculate the product of all numbers except the zero
+      const totalProduct = nums.reduce((acc, num) => {
+        if (num === 0) {
+          return acc;
+        } else {
+          return num * acc; 
+        }
+      }, 1);
+      return nums.map((num) => {
+        if (num === 0) {
+          return totalProduct
+        } else {
+          return 0;
+        }
+      });
+    } else {
+      // If there are more than one zero, return an array of zeros
+      return nums.map((_) =>  0);
+    }
+};