Using JSON response in CFIF - json

Question

Is it possible to use response.DATA[i][j] in a CFIF statement.
chkUsernameUnique = function(theUsername){
$.ajax({
type: "GET",
url: "/book.cfc",
data: {method: "testFunction", datum: $('#date').val(), returnFormat: "JSON"},
dataType: "json",
success: function(response) {
var str = '<table><tr>';
var i;
var j;
//loop over each column name for headers
for (i = 0; i < response.COLUMNS.length; i++) {
str += '<th>' + response.COLUMNS[i] + '</th>';
}
str += '</tr>';
//loop over each row
for (i = 0; i < response.DATA.length; i++) {
str += '<tr>';
//loop over each column
for (j = 0; j < response.DATA[i].length; j++) {
str += '<td>' + response.DATA[i][j] + '</td>';
}
str += '</tr>';
}
str += '</table>';
$('#debugDiv').html(str);
},
error: function(ErrorMsg) {
console.log('Error');
}
});
}
What I want to do is something like:
<cfif response.DATA[i][j] is 3> str += '<td>test</td>';</cfif>
This returns the following error message: variable [RESPONSE] doesn't exists.

Answer 1

The response variable is the server response for your AJAX request and you are working with it on clientside. Thus you are still in the realm of JavaScript:
if (response.DATA[i][j] == 3) { str += '<td>test</td>'; }
ColdFusion (i.e. <cfif>) is executed on serverside, thus cannot be used to evaluate data during runtime (after the browser requested an URI).