Decision Making structures ColdFusion

DM-CFML.md

#Decision Making Structures

• Operators

CFML and CFScirpt | CF8+ CFScript Only --- | --- | --- IS, EQUAL, EQ | == IS NOT, NOT EQUAL, NEQ | != GT, GREATER THAN, LT, LESS THAN, GTE, LTE | >, <, >=, <= CONTAINS | N/A DOES NOT CONTAIN | N/A

• Join conditions

CFML and CFScript	CF8+ CFScript Only
AND	&&
OR	// (two vertical bars)
NOT	!
XOR	N/A
EQV	N/A
IMP	N/A

What if?

• CFML

<cfif n1 GTE n2>
    <h1>N1 is greater or equal than N2</h1>
<cfelse>
    <h1>N1 is less or equal than N2</h1>
</cfif>

• CFScript

<cfscript>
if (N1 >= N2) {
    ...some code...;
} else {
    ...some other code...;
}
</cfscript>

What if or if?

• CFML

<cfif n1 GT n2>
    <h1>N1 is greater than N2</h1>
<cfelseif n1 EQ n2>
    <h1>N1 is equal to N2</h1>
<cfelse>
    <h1>N1 is less than N2</h1>
</cfif>

• CFScript

<cfscript>
if (N1 > N2) {
    ...greater than code...;
} else if (N1 == N2) {
    ...code for equality...;
} else {
    ...less than code...;
}
</cfscript>

Switch case

• CFML

<cfswitch expression="#myVar#">
    <cfcase value="1">
        ...code...
    </cfcase>
    <cfcase value="9,10"> <!---9 or 10--->
        ...code...
    </cfcase>
    <cfdefaultcase>
        ...finally...
    </cfdefaultcase>
</cfswitch>

• CFScript

<cfscript>
switch (myVar) {
    case 1:
        ...some code...;
        break;
    case 9:
        ...some code...;
        break;
    default:
        ...default code...;
        break;
}
</cfscript>

Ternary operation

<cfscript>
x = (myVar == 1) ? 1 : 277;
</cfscript>

Variables Scope

Prefix	Scope	What is for?	Required?
var	current page	default	NO
URL	current page	values pased on the query string	NO
CGI	any page	server environment variables	NO
FORM	current page	values pased through a form	NO
COOKIE	any page	values to keep in the client machine	NO
CLIENT	any page	varaibles created using the client prefix	NO
ARGUMENTS	local to the function or component method	values required by the function or method	NO
SESSION	any page for the duration of a client session	client info	YES
APPLICATION	any page to all users until application restarted	info global to the application	YES
SERVER	any page that is delivered from specific server	server information	YES