Lim Woojae (@jaylog)

jaylog.hashnode.dev

[SQL] Writing Efficient SQL Queries

Think of yourself building a program. It can be any types, such as website, app, etc. These applications may require database to show the data that the user requested. For example, you can think of a table that stores GPS-related data. The longitude ...

Jun 30, 20254 min read

jaylog.hashnode.dev

June 2025 회고록

생각보다 그리 덥지 않았던 이번 6월 이었다. 무엇을 회고해보면 이 글이 의미 있게 남겨질까 고민을 했다. 100년이 될 수도 있는 나의 인생에서 그저 30일을 돌아보는, 그것마저도 그렇게 spectacular 하지 않았던 그런 나날들을 돌이켜 보는 것이다. 하지만, 이런 회고를 통해서 많은 배움이 있다고 생각한다. 우리가 학교 과목들을 잊지 않으려 복습 하듯, 아쉬웠던 점들, 태도, 마인드 등등을 돌아보는 것에는 큰 의미가 있다. 많은 사람들...

Jun 27, 20252 min read

jaylog.hashnode.dev

[CS Fundamentals] Binary Search

Idea Binary Search is a powerful algorithm to search for a certain value. If you were to find 3 in an array = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9], how are you going to come up with the index of 3? The first method that pops up in your head would be lookin...

May 19, 20253 min read

jaylog.hashnode.dev

[CS Fundamentals] Sorting Algorithms

Selection Sort Selection sort is the simplest way to sort an array. Pretend that index 0 is the smallest, and we look at each element. We select the smallest element from other index and swap the two elements. array = [5, 7, 9, 0, 3, 1, 6, 2, 4, 8] ...

May 12, 20254 min read

jaylog.hashnode.dev

[CS Fundamentals] DFS and BFS

In this article, I will introduce the basic concept of Depth-First Search(DFS) and Breadth-First Search(BFS). Both focuses searching, but the difference is the way of doing it. DFS To understand DFS, you need to know stack and recursive function. I ...

May 11, 20253 min read

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Lim Woojae

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Lim Woojae's blogs

Recently published

[SQL] Writing Efficient SQL Queries

June 2025 회고록

[CS Fundamentals] Binary Search

[CS Fundamentals] Sorting Algorithms

[CS Fundamentals] DFS and BFS

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Lim Woojae

About

Available for

Lim Woojae's blogs

Recently published

[SQL] Writing Efficient SQL Queries

June 2025 회고록

[CS Fundamentals] Binary Search

[CS Fundamentals] Sorting Algorithms

[CS Fundamentals] DFS and BFS