What is the DFS and BFS?
When we try to search the shortest route, There are a lot of way to search. Today, we take a look two represented search algorithm, DFS and BFS. First DFS is Depth-First Search. It start from the root, search whole...
What is the Binary search?
BinarySearch algorithm is search algorithm in the sorted data set. it can not apply to unsorted data set. Let’s take a look step by step. assume the data set is already ascending sorted. First, Check the middle of data set....
What is the Big O Analysis?
What is the Big O Analysis? O in the Big O is Omega. In programming, time complexity is major issue to optimize the program. To compare the efficiency of algorithm, we usually use Big O analysis. Big O notation usually...
What is the OSI model?
The Open Systems Interconnection model is standarized model that using layer to graphical description which is divided by 7 layer. Let’s think step by step when we try to send a package to friend house. choose the present that we...
How to write a Pseudocode
How to write a Pseudocode? Sometimes we need to explain how it works to other engineer, custormer or project manager. But most of them is not expert to our area. How do we do explain the logic to them? There...
What is the Operating System(OS)?
This post is for the very beginner. What is the Operating System(OS)? Refer to Wikipedia, An operating system(OS) is system software that manages computer hardware, software resources, and provides common services for computer programs. Let’s think about Messenger program. Program...
What's a Linked List
This post is for the very beginner. Linked list is quiet good example to explain pointer and memory. Let’s think about when we stand in line. We usually don’t know what order i’m standing in at the front. However we...
Start-blog
My life goal is that makes the world that everyone can learn why they want and achieve their dream. However, we could not change the world in one day. Running blog, I expect to communicate with talented developers, get motivation...