标签: Java Python 算法 收藏 LeetCode 387: 字符串中的第一个唯一字符 First Unique Character in a String 题目: 给定一个字符串,找到它的第一个不重复的字符,并返回它的索引。如果不存在,则返回 -1。 Given a string, find the first non-repeating character in it and return it’s index. If it...
Given a string, find the first non-repeating character in it and return it's index. If it doesn't exist, return -1. 案例: Copys = "leetcode" 返回0. s = "loveleetcode", 返回 2. 注意事项:您可以假定该字符串只包含小写字母。 Note: You may assume the string contain only lowercase ...
class Solution(object): def firstUniqChar(self, s): s=s.lower() sList=list(s) numCdic={} for c in s: numCdic[c]=numCdic[c]+1 if c in numCdic else 1 for i in range(len(sList)): if numCdic[sList[i]]==1: return i return -1 sol=Solution() print sol.firstUniqChar...
[Algorithm] 387. First Unique Character in a String 2019-12-13 22:36 −Given a string, find the first non-repeating character in it and return it's index. If it doesn't exist, return -1. Examples: s = "leetcode" return 0... ...
2019-12-13 22:36 −Given a string, find the first non-repeating character in it and return it's index. If it doesn't exist, return -1. Examples: s = "leetcode" return 0... Zhentiw 0 173 利用Python进行数据分析-Pandas(第五部分-数据规整:聚合、合并和重塑) 2019...
class Solution: def minDeletions(self, s: str) -> int: char_freq_dict = {} for char in s: char_freq_dict[char] = char_freq_dict.setdefault(char, 0) + 1 char_freq_list = sorted( [(char, freq) for …
Example 1: Reproduce the Error in cut.default : ‘breaks’ are not unique This example shows how to replicate the “Error in cut.default : ‘breaks’ are not unique” in the R programming language. Let’s assume that we want to split our vector object by certain breaksusing the cut fun...
UUID v4 provides no other information than randomness which can cause fragmentation in many data structures ULID provides: 128-bit compatibility with UUID 1.21e+24 unique ULIDs per millisecond Lexicographically sortable! Canonically encoded as a 26 character string, as opposed to the 36 character UUID...
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UUID.hex:The UUID as a 32-character hexadecimal string. UUID.int:The integer representation of a UUID as a 128-bit integer. UUID.urn:The UUID as a uniform resource name. UUID.variant:The UUID variant, which determines the internal layout of the UUID. This will be one of the constants ...