原创 Regular Expression - Posix
1. Character Class [:alnum:] // match number [:alpha:] // match char [:lower:] // match lower case char [:uppe
2020-06-25 22:25:11
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原创 Python Beginner
Python is an implicit type language, which means you don't need to declare a type for the variable, only you need to do
2020-06-25 22:25:11
原创 Android - Fragments
Fragment is like a portion of user interface. We can use multiple Fragments in one Activity, or reuse one fragment
2020-06-09 22:25:23
原创 Python - access network
TCP Network Transport Control Protocol(TCP) is built on top of IP. TCP assumes IP might lose some data, so tcp will
2020-06-09 22:25:23
原创 Linux Command
1. The format of Command: command [option] [file] The type of file ( - file , d directory , l shortcut ) (rig
2020-02-22 00:47:40
原创 Matching Game based on JS
Using JavaScript to realize a matching game in web browse. Purpose: find the extra “smile” in the left side, compar
2020-02-22 00:47:29
原创 Selection sort
Java implementation: public class Selection{ public static void sort(Comparable[] a) { int N = a.length
2020-02-22 00:47:29
原创 Bootstrap - navigation
Will Edit Later… about the ‘class’ about nav <!DOCTYPE html> <!-- saved from url=(0077)https://d396qusza40orc.cloud
2020-02-22 00:47:29
原创 ShellSort
The idea of Shellsort is moving entries more than one position at a time by h-sorting the array. h = 4 L E E A M H
2020-02-22 00:47:28
原创 Merge Sort
The main idea of merge sort is: Divide array into two halves Recursively sort each half Merge two half The purpose
2020-02-22 00:47:28
原创 Android - Custom View
在很多時候，Android自帶的控件並不能滿足我們編程的需求。這個時候就需要我們開發出美觀，功能完善的自定義控件。在智能燈泡的APP這個項目中，需要SlideMenu控件使得界面更加充實，需要ColorPickerView控件來自定義燈泡
2018-08-31 01:20:49
原创 How back-Propagation works
In order to minimize the cost function, we expect small changes in weights lead to samll changes in output. So we can u
2018-08-31 01:20:41
原创 JavaScript - This
One of most confusing mechanisms in JavaScript is the this identifier. It’s a special identifier keyword that’s automat
2018-08-31 01:20:35
原创 Android - Handler機制
在Android系統中Activity View的更新的操作是非線程安全的，例如：如果多個線程併發的去操作同一個View，那麼系統就可能不知道如何處理而導致程序無法快速響應而崩潰。爲了防止出現這個問題，Android官方就規定了只允許創建
2018-08-31 01:20:35
原创 Puzzle - Light Bulb Switching
Light Bulb Switching Teaser The title of this quesion is easy to understand. There are 100 light bulbs with label 1 to
2018-08-31 01:20:33