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Generate assets on production

$ RAILS_ENV=production bundle exec rake assets:precompile

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TAR COMMAND

• tar 形式＋GZIP 形式 ～.tgz, ～.tar.gz

tar zcvf backup.tar.gz file1 file2

• tar.BZ2(TBZ) 形式 ～.tar.bz2, ～.tbz

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CONFIG NETWORK IN CENTOS 7

Dùng nmtui

Dùng nmtui để add, nếu có 2 cái ip thì dùng câu này để xóa đi.

sudo ip addr del 192.168.1.104/24 dev enp0s3

Setup bằng tay:

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INSTALL VLC IN CENTOS7

sudo rpm -Uvh http://li.nux.ro/download/nux/dextop/el7/x86_64/nux-dextop-release-0-1.el7.nux.noarch.rpm
sudo yum update
sudo yum groupinstall "Development Tools"
sudo yum install dkms gcc
sudo yum install yasm-devel
sudo yum install rpmdevtools
sudo yum install dpkg

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CÁC CÂU HỎI VỀ IOS

Các câu hỏi về iOS – Objective C

1. Khác nhau giữa self & dấu gạch dưới (e.g: self.name & _name)?

2. Property là gì?

3. Khác nhau giữa thuộc tính weak & strong?

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Quy tắc viết động từ (gồm 12 dạng)

###1. 動―ない形 Giải thích: Thể phủ định (nai), chú ý là không bao gồm ない

###2. 動―ない形―ない Giải thích: Thể phủ định (nai) + ない

###3. 動―ます形 Giải thích: Thể masu, chú ý là không bao gồm ます

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20 Python libraries can’t live without

1. Requests. The most famous http library written by kenneth reitz. It’s a must have for every python developer.

2. Scrapy. If you are involved in webscraping then this is a must have library for you. After using this library you won’t use any other.

3. wxPython. A gui toolkit for python. I have primarily used it in place of tkinter. You will really love it.

4. Pillow. A friendly fork of PIL (Python Imaging Library). It is more user friendly than PIL and is a must have for anyone who works with images.

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##木蓮の涙

逢いたくて　逢いたくて
Aitakute aitakute
この胸のささやきが
kono mune no sasayaki ga
あなたを探している
anata o sagashite iru
あなたを呼んでいる

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3 short stories to replenish your creative thinking

Believe the impossible

In 1295, Marco Polo returned from a 24 year trading epic to China. His trip had taken him 14,000 miles (25,000km) around the world, from his birth town of Venice, through Baghdad and all the way across Asia. He visited dozens of great cities, many of which are now lost to antiquity, finally reaching the bustling trading city of Beijing in the east. After his return, he created a great epic of his travels. His epic spread quickly across Europe, each book meticulously and laboriously copied by hand and destined for the private libraries of the rich and powerful European elite. His wondrous tale became the basis for what all Europeans knew about the Orient for many years to come.

In it, he spoke of many weird and wonderful places he had visited. He spoke of creatures so wild and wonderful, they simply had to be seen. He spoke of dragons, unicorns and birds so large they could lift an elephant high into the air:

It was for all

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Simple Arduino and HC-SR04 Example

/*
 HC-SR04 Ping distance sensor]
 VCC to arduino 5v GND to arduino GND
 Echo to Arduino pin 13 Trig to Arduino pin 12
 Red POS to Arduino pin 11