Ray's playground

摘要：Top C++, WPF, WCF, WF, ASP.net, Ajax Python Medium Design Pattern Algorithm SQL Server Low Java 阅读全文

摘要：Problem You like the C++ approach to I/O, based on ostreams and manipulators (special objects that cause special effects on a stream when inserted in it) and want to use it in your Python programs. So... 阅读全文

摘要：Problem You need to know the relative path from one directory to anotherfor example, to create a symbolic link or a relative reference in a URL. Solution Precondition itertools.izip(*iterables) Make ... 阅读全文

摘要：Problem You need to rename files throughout a subtree of directories, specifically changing the names of all files with a given extension so that they have a different extension instead. Solution Oper... 阅读全文

摘要：Definition Separates the construction of a complex object from its representation so that the same construction process can create different representations. Class Diagram Participants Builder... 阅读全文

摘要：Precondition 1. os.walk(top[, topdown=True[, onerror=None[, followlinks=False]]]) Generate the file names in a directory tree by walking the tree either top-down or bottom-up. For each directory in t... 阅读全文