Reverse Prefix of Word
Given a 0-indexed string word and a character ch, reverse the segment of word that starts at index 0 and ends at the index of the first occurrence of ch (inclusive). If the character ch does not exist in word, do nothing.
Return the resulting string.
Example 1
Input
word = "abcdefd", ch = "d"Output
"dcbaefd"The first occurrence of "d" is at index 3, so reversing
word from index 0 to 3 gives "dcbaefd".Example 2
Input
word = "xyxzxe", ch = "z"Output
"zxyxxe"The first and only occurrence of "z" is at index 3, so reversing
word from index 0 to 3 gives "zxyxxe".Constraints
- 1 <= word.length <= 250
- word consists of lowercase English letters.
- ch is a lowercase English letter.