CSC/ECE 517 Fall 2010/ch3 3e br: Difference between revisions

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=eval()=
=eval() [Computer Programming]=
==Introduction==
==Introduction==
The eval facility is one of the most powerful features of Ruby (as well as other dynamic languages).  
The eval facility is one of the most powerful features of Ruby (as well as other dynamic languages).  

Revision as of 13:31, 3 October 2010

eval() [Computer Programming]

Introduction

The eval facility is one of the most powerful features of Ruby (as well as other dynamic languages). Kernel.eval method will parse and execute an arbitrary string of legal Ruby source code. To put it plainly, if your Ruby program can generate a string of valid Ruby code, the Kernel.eval method can evaluate that code. The eval facility gives developers the ability to modify the runtime behavior of program. Illustrate the practical advantages of Ruby's eval(...) and compare it with similar mechanisms in other languages.

Origin

[1] Lisp, Retrieved October, 2010.

Security risks

[2] Eval, Retrieved October, 2010.

Context

Implementation

Dynamic Programming Languages

Lisp

Perl

Ruby

JavaScript

PHP

Python

ColdFusion

Static Programming Languages

Java

GroovyShell

Command Line interpreters

Unix

References

[3] Eval, Retrieved October, 2010.