Convert snake_case to camelCase or PascalCase (TheAlgorithms#7028) (TheAlgorithms#7034)

* Added snake_case to Camel or Pascal case Fixes: TheAlgorithms#7028

* Added suggested changes

* Add ending empty line from suggestion

Co-authored-by: Caeden <[email protected]>

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* Update strings/snake_case_to_camel_pascal_case.py

Co-authored-by: Christian Clauss <[email protected]>

Co-authored-by: Caeden <[email protected]>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Christian Clauss <[email protected]>

Author: 4 people

strings/snake_case_to_camel_pascal_case.py

@@ -0,0 +1,52 @@
+def snake_to_camel_case(input: str, use_pascal: bool = False) -> str:
+    """
+    Transforms a snake_case given string to camelCase (or PascalCase if indicated)
+    (defaults to not use Pascal)
+
+    >>> snake_to_camel_case("some_random_string")
+    'someRandomString'
+
+    >>> snake_to_camel_case("some_random_string", use_pascal=True)
+    'SomeRandomString'
+
+    >>> snake_to_camel_case("some_random_string_with_numbers_123")
+    'someRandomStringWithNumbers123'
+
+    >>> snake_to_camel_case("some_random_string_with_numbers_123", use_pascal=True)
+    'SomeRandomStringWithNumbers123'
+
+    >>> snake_to_camel_case(123)
+    Traceback (most recent call last):
+        ...
+    ValueError: Expected string as input, found <class 'int'>
+
+    >>> snake_to_camel_case("some_string", use_pascal="True")
+    Traceback (most recent call last):
+        ...
+    ValueError: Expected boolean as use_pascal parameter, found <class 'str'>
+    """
+
+    if not isinstance(input, str):
+        raise ValueError(f"Expected string as input, found {type(input)}")
+    if not isinstance(use_pascal, bool):
+        raise ValueError(
+            f"Expected boolean as use_pascal parameter, found {type(use_pascal)}"
+        )
+
+    words = input.split("_")
+
+    start_index = 0 if use_pascal else 1
+
+    words_to_capitalize = words[start_index:]
+
+    capitalized_words = [word[0].upper() + word[1:] for word in words_to_capitalize]
+
+    initial_word = "" if use_pascal else words[0]
+
+    return "".join([initial_word] + capitalized_words)
+
+
+if __name__ == "__main__":
+    from doctest import testmod
+
+    testmod()