Basics
Set Variable |
foo = "bar"; |
Define Array |
arrBeer = [“Guinness”, “Harp”, “Boddingtons”]; //CF10 |
Define Struct |
structBeer = {isGood:”heck yes”}; //CF10 |
CFAbort |
abort; |
CFDump |
writeDump(beer); |
CFInclude |
include "template.cfm"; |
CFOutput |
writeOutput("I like " & beer); |
CFParam |
param name="variables.pint" default="1"; //CF9 |
CFSetting |
setting enablecfoutputonly="true" requesttimeout="180" showdebugoutput="no"; //CF10 |
Comments
//write single line comments like this
/* multi-line comments
are done like this */ |
single line comments can follow code:
var a = 1; // set up array counter
/* code can follow multi-line comments:
like this */ var beer = "tasty";
If / Else If / Else
if (beer EQ "Guinness") {
writeOutput("It's Stout");
} else if (beer IS "Harp") {
writeOutput("It's Lager");
} else {
writeOutput("It might be beer...");
} |
Switch / Case
switch(beer) {
case "Guinness":
writeOutput("It's Stout");
break;
case "Harp": case "Stella":
writeOutput("It's a Lager");
break;
default:
writeOutput("It's beer, I think...");
} |
Try / Catch / Throw / Finally / Rethrow
try {
throw(message="Oops", detail="xyz"); //CF9
} catch (any e) {
writeOutput("Error: " & e.message);
rethrow;//CF9
} finally {//CF9
writeOutput("I always run - even if no error is thrown");
} |
Call Component Function (CF10)
result = invoke(
"beermenu.cfc.beer" // component
,"getRatings" // function
,{beer_id=id} // arguments
); |
the return of the function is stored in #result#
|
|
FOR Loops
for (i=1;i LTE arrayLen(array);i=i+1) {
writeOutput(array[i]);
} |
FOR IN Loops
struct = {};
struct.one = "1";
struct.two = "2";
for (key in struct) {
writeOutput(key);
} |
WHILE Loop
x = 0;
while (x LT 5) {
x = x + 1;
writeOutput(x);
} |
DO WHILE Loop
x = 0;
do {
x = x+1;
writeOutput(x);
} while (x LTE 0); |
Database Queries (CF9)
// create a query object and parameters
qry = new query(
name="qImports"
,datasource=variables.dsn
,username=variables.user
,password=variables.password
);
qry.addParam(
name="beer_id"
,cfsqltype="cf_sql_varchar"
,value=variables.beer_id
);
doQry = qry.execute(sql="
SELECT b.name
,m.name as brewer
,b.alcohol
,b.IBU
,b.ratings
FROM beers as b
JOIN brewers m ON b.brewer = m.id
WHERE id = :beer_id and import = true
");
// put the results into the qBeer variable
qBeer = doQry.getResult(); |
|
|
Array Iteration (CF10)
arrayEach(arrBeer, function(i) {
writeOutput(“I like “ & i & “<br/>”);
}); |
Array Filtering (CF10)
delicious = arrayFilter(arrBeer, function(b) {
return b.alcohol >= 5 || b.brand EQ “Franziskaner”;
}); |
Defining Components
component extends="Beer" output="false" {
property name="variety" type="string";
public boolean function isGood() {
return true;
}
private void drink(required numeric pint) {
//do stuff
}
} |
Defining Functions
remote string function drink(required numeric pints) {
var dry = 0;
if (arguments.pints GT dry) {
return "beer";
} else {
return "no beer";
}
} |
Transactions
transaction {
//do stuff
if (good) {
transaction action="commit";
else {
transaction action="rollback";
}
} |
Database Stored Procedures (CF9)
// instantiate the SP
sp = new storedproc(
datasource=variables.dsn
,procedure="getBeerRating"
,username=request.dsnuser
,password=request.dsnpassword
);
// set the input var
sp.addParam(
type="in"
,cfsqltype="cf_sql_integer"
,value=id
);
// set the output var
sp.addParam(
type="out"
,cfsqltype="cf_sql_bit"
,variable="rating"
);
// execute the SP call
result = sp.execute();
// store the SP return
rating = result.getprocOutVariables().rating; |
|
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