PHP & Python

PHP 引入檔 路徑搜尋

Python變數

Function

OOP of PHP & Python(物件導向)

賦值運算子 (assignment operator)php&python

sprintf   

PHP Note

arduino

Arduino & Raspberry Pi    


Educational robot 教育用機器人

ProgrammingConcepts

Comment syntax(程式的註解)

單引號與雙引號,與跳脫字元

換行(newline,linebreak) 

regex(正規表達式) 

判斷指令

條件運算子(Conditional Expressions) 

堆疊(Stack)& 佇列（Queue）

Recursion遞迴

二元樹&排序Binary search tree

字元變數

plug-in(外掛程式) 與 extension,add-on(擴充元件)

程式常用標點符號英文及分別

notes雜記

Linux

檔案管理File management 

檔案系統管理File systems

系統資訊System Information 

系統管理System management 

套件管理Package managerment 

網路管理Networking 

程序管理Process control

使用者管理User management 

開機啟動及服務啟動管理sysV vs systemd  


vi指令

NFS與CIFS

google-drive-ocamlfuse(install google-drive on linux)

Apache note

Apache-CGI配置

Apache-虛擬主機

Apache-資料夾設定

Apache-全域設定

Apache-.htaccess 改寫網址設定

Apache-啟動多少個服務器進程

Linux 的開機程序 

檔案系統的掛載與卸載(mount and umount) 

檔案系統

換行(newline,linebreak)

<br /> 是一個HTML換行符
 換句話說，當您將頁面視為呈現的HTML時，<br />將創建一個新行。

\ n是源代碼中的換行符
而當您查看源代碼時，\ n將創建一個新行。

或者，如果您輸出到CLI而不是將由Web瀏覽器呈現的某個位置，則\ n將在CLI輸出中創建換行符。

e.g.
<?php
echo " 換行<br />";
?>

in CLI
 <?php
#!/usr/bin/php
<?php
echo " 換行\n";
?>

Comment syntax(程式的註解)

Bash
#This is a comment.

PHP 
// This is a single-line comment.
# This is also a single-line comment.

/*
This is a multiple-lines comment block.
*/

Python
# This is a comment.

""" 
This is a multiple-lines comment block.
"""
 
HTML 
<!--This is a comment.-->
 
Jacascript
// This is a single-line comment./*
This is a multiple-lines comment block.
*/

CSS

/*
This is a multiple-lines comment block.
*/

Perl
#This is a comment. 

C
 /* This is a comment.*/

C++
 // This is a single-line comment.

Instruction Set Architecture(指令集架構ISA)

定義
ISA allows communcation between software & hardware
It is also a group of COMMANDS for a CPU in machine language.
one software command can use a group sets of hardware commands, like 'copy' in software can use 'add,push,pop' in Hardware.


Instruction/Commands is also called a.k.a Opcode or Operation code
Example of Opcodes:
ADD,JUMP,STORE

Two types of ISA:  CISC & RISC
CISC(complex Instruction set computing):
Large number of instructions sets

RISC(Reducted Instruction Set Computing):
Lesser set of instructions

Example of CISC & RISC
CISC
A * B
MULT A,B

RISC
A * B
Load R1,A
Load R2,B
Prod A,B
Store R3,A

Different between two
Instructions Sets
CISC > RISC

CISC is emphasis on Hardware(硬體複雜軟體簡單)
RISC is emphasis on Software(硬體簡單軟體複雜)

Execution Time
CISC is Multiple No. cycle per Instruction
RISC is 1 cycle per Instruction

Conclusion:
Both are suitable at its specific applications

E.P.I.C
Explicity Parallel Instruction Computing