Jan 31, 2025 · 3 min read · 在加入了陳年專案維護中獲得了新知識。 前言 最近工作派發了一些 Legacy Code 專案翻修，難免會遇到一些 deprecated 的方法。 面對這些陳年代碼，最大的敵人往往都是疏忽了商業邏輯以及代碼可讀性。 本篇重點不在於介紹 substr, substring, slice ，想必大家都略懂這方法。 如果使用冷門特性，你一輩子都會記得寫註解對吧！？ 這一篇的角度在於筆者對 Legacy Code 進行 String.substr() 重構的思路。 從「維護性」與「效能」的之間...
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Aug 26, 2024 · 4 min read · Problem Statement Given a string of lowercase alphabets, count all possible substrings (not necessarily distinct) that have exactly k distinct characters. Example:Input: S = "aba", K = 2Output: 3Explanation: The substrings are "ab", "ba", and "aba". ...
Join discussionJun 27, 2024 · 2 min read · Watch now and master the essential string programs that will make you a C# wizard! 🔮 https://www.youtube.com/watch?v=nNsorUMalF0 In this video, you'll discover: ✨ How to count character frequency in a string ✨ How to remove duplicates from a strin...
Join discussionMar 14, 2024 · 1 min read · Extracting Text: you can use a combination of string methods and regular expressions. using substring: You can use the substring method to extract a portion of a string based on its indices. void main() { String text = "Hello, world!"; // Extr...
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Feb 28, 2024 · 5 min read · ● String length ● String slice() ● String substring() ● String substr() ● String replace() ● String replaceAll() ● String toUpperCase() ● String toLowerCase() ● String concat() String Length:- ● String trim() ● String trimStart() ● String tr...
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Feb 1, 2024 · 3 min read · replace를 이용하여 특정 문자를 다른 문자로 바꾸는 방법 REPLACE 함수는 컬럼 내의 특정 문자를 다른 문자로 바꿀 때 사용한다. replace(바꿀 컬럼, 현재 값, 바꿀 값) ex) '문곡리'라고 되어있는 주소를 '문가리'라고 바뀐 주소명으로 치환해주기 SELECT addr, REPLACE (addr, '문곡리', '문가리') "바뀐주소" FROM food_orders WHERE addr LIKE '%문곡리%' ...
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Sep 20, 2023 · 2 min read · Substring 👍 A substring is a contiguous(continuous) sequence of characters present within a string. It is a string present inside a string.For instance, the substrings of the string “tree” would be:‘t,’ ‘r,’ ‘e,’ ‘tr,’ ‘tre,’ ‘tree,’ ‘re,’ ‘ree,’ ‘e...
Join discussionAug 24, 2023 · 1 min read · Question Statement: Given two strings needle and haystack, return the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack. Example 1: Input: haystack = "sadbutsad", needle = "sad" Output: 0 Explanation: "sad...
Join discussionMar 3, 2023 · 2 min read · The SUBSTR function is a commonly used function in SQL for manipulating string data. This function is used to extract a substring from a larger string based on a specified starting position and length. In this article, we will discuss the SUBSTR func...
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