arrayIsDefined

Determines whether an array element is defined in a given index.

arrayIsDefined(array, index) → returns boolean

Member Function Syntax

someArray.isDefined(index)

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  3. ColdFusion 8 New Functions and Tags
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  6. Lucee
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See Also:   ArrayIsEmpty

Argument Reference

array string
Required

The array object

index numeric
Required

The index to check.

Examples
Sample code invoking the arrayIsDefined function

CF 8+ To check an array element is define or not

someArray = [1,2,3,4,5];
writeOutput(arrayIsDefined(someArray, 3));

Expected Result: Yes

Lucee 4.5+ To check an array element is define or not

someArray = [1,2,3,4,5];
writeOutput(arrayIsDefined(someArray, 6));

Expected Result: false

CF 8+ To check an array element is define or not

FirstArray = [1,2,3];
secondArray = [11,12,13];
combineArray = arrayNew(2);
arrayAppend(combineArray, firstArray);
arrayAppend(combineArray, secondArray);
writeOutput(arrayIsDefined(combineArray, 3));

Expected Result: No

Lucee 4.5+ To check an array element is define or not

FirstArray = [1,2,3];
secondArray = [11,12,13];
combineArray = arrayNew(2);
arrayAppend(combineArray, firstArray);
arrayAppend(combineArray, secondArray);
writeOutput(arrayIsDefined(combineArray, 2));

Expected Result: true

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