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CFSCRIPT

CFSCRIPT. 2 types of modern scripting for the web. Tag based. Script based. CFSCRIPT. Block tags Whatever is inside will be executes (evaluation zone) No tags allowed Each expression must be terminated by a semi-colon (;) Assignment is simply variablename=value. String Number Function

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CFSCRIPT

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  1. CFSCRIPT 2 types of modern scripting for the web Tag based Script based

  2. CFSCRIPT • Block tags • Whatever is inside will be executes (evaluation zone) • No tags allowed • Each expression must be terminated by a semi-colon (;) • Assignment is simply variablename=value String Number Function Operation Expression <CFSCRIPT> Name="Michael"; Age=29; Date=Now(); Sum=11+7; AgeNext=Age+1; </CFSCRIPT>

  3. CFSCRIPT • 2 forms of comments • Comments needed as the code will be more obfuscated <CFSCRIPT> // This is a one line comment. Use this to comment on a code snippet /* This is a multi-line comment Use this when writing docs at the top of a CFACRIPT block */ </CFSCRIPT>

  4. CFSCRIPT • Execution functions (see handout) DO NOT NEED to be assigned to a variable, especially in CFSCRIPT <CFSCRIPT> // This will clear the session structure StructClear(session); // This will disconnect the data sources cfusion_dbconnections_flush(); // Reset a query cell QuerySetCell(myquery, 'name', 'Michael', 1); </CFSCRIPT>

  5. CFSCRIPT • Pay attention to standard Reserve Words • New Reserve Words

  6. CFSCRIPT: If <CFSCRIPT> // Standard IF statment IF (score GT 1) result = "positive"; // If statment with multiple parts in the if IF (score GT 1) { result = "positive"; totalscore=score+1; } </CFSCRIPT> Statment }code block - seen as one complete unit

  7. CFSCRIPT: IF - Else <CFSCRIPT> // If with an Else IF (score GT 1) result = "positive"; ELSE result = "negative"; // If, Else, Else If IF (score GT 1) result = "positive"; ELSEIF (score EQ 0) result="null"; ELSE result = "negative"; </CFSCRIPT> }Sub IF statment

  8. CFSCRIPT: Switch <CFSCRIPT> switch(name) { case "John": { male=true; break; } case "Mary": { male=false; break; } default: { found=false; break; } } //end switch </CFSCRIPT>

  9. CFSCRIPT: For Loop • For loop • FOR (init-expr ; test-expr ; final-expr) statement ; • init-expr and final-expr can be • single assignment expression, for example, x=5 or loop=loop+1 • any ColdFusion expression, for example, SetVariable("a",a+1) • empty • The test-expr can be • any ColdFusion expression, for example, A LT 5, loop LE x, or Y EQ "not found" AND loop LT • empty

  10. CFSCRIPT: For Loop <CFSCRIPT> // Loop from 1 to 10 for(Loop1=1; Loop1 LT 10; Loop1 = Loop1 + 1) score=score+loop1; // Loop from 1 to 10 for(Loop1=1; ; Loop1 = Loop1 + 1) { score=score+loop1; IF (Loop1 EQ 10) break; } </CFSCRIPT>

  11. CFSCRIPT: While Loop <CFSCRIPT> // While expression is true a = ArrayNew(1); while (loop1 LT 10) { a[loop1] = loop1 + 5; loop1 = loop1 + 1; } // While expression is true a = ArrayNew(1); while (loop1 LT 10) { IF (loop1 mod 2 EQ 0) continue; loop1 = loop1 + 1; } </CFSCRIPT>

  12. CFSCRIPT: Do-While Loop <CFSCRIPT> // Multiline do-while loop // Tests AFTER code is run a = ArrayNew(1); do { a[loop1] = loop1 + 5; loop1 = loop1 + 1; } while (loop1 LT 10); </CFSCRIPT>

  13. CFSCRIPT: For-In Loop Special loop for dealing with collections (I.e. structures) for (variable in collection) statement ; <CFSCRIPT> for (x in Session) WriteOutPut(Session[x]&’<br>’); </CFSCRIPT>

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