基于PHP计算属性集的闭包

›› 2014, Vol. 27 ›› Issue (3): 28-.

基于PHP计算属性集的闭包

王小兵,于思江

(1.西安电子科技大学计算机学院,陕西西安 710071;2.西安邮电大学财务处,陕西西安 710121)

出版日期:2014-03-15 发布日期:2014-03-11
作者简介:王小兵(1979—),男,副教授,博士。研究方向:数据库理论,编译原理等。E-mail:xbwang@foxmail.com。于思江(1981—),女,工程师,硕士。研究方向:数据库理论。
基金资助:
西安电子科技大学教改基金资助项目(B1104)

Closure Computation on Attribute Sets Based on PHP

WANG Xiaobing¹,YU Sijiang²

(1.School of Computer Science,Xidian University,Xi'an 710071,China;2.Financial Section,Xi'an University of Posts and Telecommunications,Xi'an 710121,China;)

Online:2014-03-15 Published:2014-03-11

摘要/Abstract

摘要：

针对计算属性集闭包的程序复杂,函数依赖描述不直观等问题,基于PHP实现了属性集闭包的计算。文中使用数组描述函数依赖,使用PHP自带的数组函数实现集合操作,定义了属性集闭包函数Closure,程序实例说明了函数依赖集的初始化与Closure函数的调用方法。该方法采用的PHP程序结构简单,代码量少,易于实现与维护,可以独立解释执行,也可以嵌入到HTML中解释执行。

关键词: 函数依赖, 属性集闭包

Abstract:

The current program for computing closures on attribute sets is complicated and describes functional dependences indirectly.PHP is used to compute closures on attribute sets for addressing problems.Closure function is defined to compute closures on attribute sets,in which arrays represent functional dependences,and array functions in PHP realize set operations.The program example illustrates the initialization of functional dependence sets and the invocation of closure function.The PHP program is simple,short and easy to maintain.It can be interpreted independently or in HTML.

Key words: PHP;functional dependence;closure of attribute sets

中图分类号:

TP311

王小兵,于思江. 基于PHP计算属性集的闭包[J]. , 2014, 27(3): 28-.

WANG Xiaobing1,YU Sijiang2. Closure Computation on Attribute Sets Based on PHP[J]. , 2014, 27(3): 28-.