CFIF

1. CFIF From the ground up

2. Who am I • Michael Dinowitz • Head of House of Fusion • Publisher of Fusion Authority • Founding member of Team Macromedia • CTO of Dinowitz and Associates • Using ColdFusion since June 1995

3. Boolean • True / False • “Yes” / “No” • !0 / 0

4. Basic syntax • <CFIF Boolean> • <CFIF 1> • <CFIF True> • <CFIF “Yes”>

5. Evaluation - 1 level • <CFIF Variable> • CFIF Is an evaluation zone • <CFIF IsTrue> • Is True is a variable with the value True

6. Comparison – 1 level • <CFIF “name” is “Michael”> • Comparison syntax IS / EQ / Equal Is Not / NEQ / Not Equal Contains Does not Contain Greater Than / GT Greater Than or Equal To / GTE Less Than / LT Less Than or Equal TO / LTE

7. Comparison/Evaluation • <CFIF Name is “Michael”> • 2 steps • One for the evaluation of name • The second for the comparison

8. Functional Comparison • <CFIF IsDefined(‘var’) is True> • 2 steps • 1 for the function evaluation • 1 for the comparison Should be 1 step <CFIF IsDefined(‘var’)> IsDefined returns a boolean

9. Multiple Clauses • <CFIF clause 1 joiner clause 2> • <CFIF name is “michael” and age is 11> • AND - Clause 1 and clause 2 • OR - either or can be true • NOT - negation • EQV - both clauses must be the same (true of false) • IMP - if clause 1 is true and clause 2 is false, then its false otherwise true • XOR - one or the other but not both

10. Short Circuited Boolean Evaluation • Introduced in CF 4.01 • Shortens the operation of multi-clause comparisons using logic • If the joiner is AND and the first clause fails, the whole comparison fails • If the joiner is OR and the first clause succeeds then the whole comparison succeeds

11. Parenthesis • Separates between logical chunks

12. CFELSE

13. CFELSEIF

14. CFSWITCH

15. CFSET