Efficiency: Do This In SAS?

This app, "Efficiency: How Do You Do This In SAS?", is one of a series of eBooks about SAS software programming focusing on frequently asked questions and answers about efficient SAS programming, both in program speed and maintenance, illustrated by code samples which can be sent by email directly from the app. It is designed to encourage users to contribute questions some of which will be included in future versions of the app. There are controls to select specific questions, move to the previous or next question, decrease or increase the font to suit the users preference, and send emails requesting answers to questions not yet included in that version of the eBook.The questions, with answers, included are:1. Introduction2. About the Author: Philip R Holland3. What is Efficiency4. Is code formatting important5. Is SAS training important6. What performance factors are important7. Using look-up tables with Data Step Merge8. Using look-up tables with PROC SQL9. Using look-up tables with SAS Formats10. Using look-up tables with generated IF..THEN..ELSE statements11. Using look-up tables with generated SELECT..WHEN..OTHERWISE statements12. Using look-up tables: which method is the quickest 13. How can I delete all the data sets created by my macro14. How can I restore all the options changed by my macro