Custom Implementation of join.py

Author: sanks011

strings/join.py

@@ -1,49 +1,27 @@
-"""
-Program to join a list of strings with a separator
-"""
-
-
 def join(separator: str, separated: list[str]) -> str:
     """
-    Joins a list of strings using a separator
-    and returns the result.
-
-    :param separator: Separator to be used for joining the strings.
-    :param separated: List of strings to be joined.
-
-    :return: Joined string with the specified separator.
+    Custom implementation of the join() function.
+    This function manually concatenates the strings in the list,
+    using the provided separator, without relying on str.join().
 
-    Examples:
-
-    >>> join("", ["a", "b", "c", "d"])
-    'abcd'
-    >>> join("#", ["a", "b", "c", "d"])
-    'a#b#c#d'
-    >>> join("#", ["a"])
-    'a'
-    >>> join(" ", ["You", "are", "amazing!"])
-    'You are amazing!'
-
-    This example should raise an exception for non-string elements:
-    >>> join("#", ["a", "b", "c", 1])
-    Traceback (most recent call last):
-        ...
-    Exception: join() accepts only strings
-
-    Additional test case with a different separator:
-    >>> join("-", ["apple", "banana", "cherry"])
-    'apple-banana-cherry'
-    >>> join(",", ["", "", ""])
-    ',,,'  # This test will now pass correctly
+    :param separator: The separator to place between strings.
+    :param separated: A list of strings to join.
 
+    :return: A single string with elements joined by the separator.
+    
+    :raises Exception: If any element in the list is not a string.
     """
-
     if not all(isinstance(word_or_phrase, str) for word_or_phrase in separated):
         raise Exception("join() accepts only strings")
 
-    joined = separator.join(separated)
+    # Manually handle concatenation
+    result = ""
+    for i, element in enumerate(separated):
+        result += element
+        if i < len(separated) - 1:  # Add separator only between elements
+            result += separator
 
-    return joined
+    return result
 
 
 if __name__ == "__main__":