摘要： 1 #include<stdio.h> 2 #include<unistd.h> 3 main() 4 { 5 //situation 1 6 //int *p = sbrk(4); // Here we allocate 1024(decides to the system) bytes of m 阅读全文

摘要： wget http://download.qt.io/archive/qt/5.9/5.9.2/qt-opensource-linux-x64-5.9.2.runchmod +x qt-opensource-linux-x64-5.9.2.run./qt-opensource-linux-x64-5 阅读全文

摘要： #!/usr/bin/env python# Author:liujunimport pickledef sayHi(name): print("hello,",name)av_catalog = { "Am":{ "www.youporn.com": ["很多免费的,世界最大的","质量一般"], 阅读全文

摘要： #!/usr/bin/env python# Author:liujun# Decide if a type can iteratefrom collections import Iterableprint(isinstance([],Iterable))print(isinstance("abc" 阅读全文

摘要： #!/usr/bin/env python# Author:liujun# List Comprehensions# A list comprehension generates all elements at once ,which consumes a lot of memory# versio 阅读全文

摘要： #!/usr/bin/env python# Author:liujun# The essence of decorator is function which is used to decorate another function.# The decorator is used to add s 阅读全文

摘要： 1. 2. 3. 4. 5. 6. 阅读全文

摘要： 1. classfys according to the range in which configuration files take effect. 1.1 The global configuration file /etc/profile : /etc/profile.d/*.sh /etc 阅读全文

摘要： 1. Basic grammar egrep = grep -E egrep [OPTIONS] PATTERN [FILE...]2. Meta-charecter of extended regexp 2.1 Character match .： Matchs any single charac 阅读全文

摘要： 1. grep : Global search Regular expression and Print out the line. 1.1. function：searches the given FILEs for lines containing a match to the given PA 阅读全文