CSC/ECE 517 Fall 2010/ch3 3e br

eval()

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]

Security risks

[2]

Implementation

=Java

GroovyShell

Command Line interpreters

<ref>The Metacircular Evaluator

References

[3] Introducing Bazaar. Retrieved September, 2010.

[4] Aran, A Brief History of Version Control Systems. Retrieved September, 2010.