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arrayLen

Determines the largest index in an array. For dense arrays, this corresponds to the number of elements in the array. CF MX: this function can be used on child XML objects.

arrayLen(array)

returns numeric

Member Function Syntax

someArray.len()

Argument Reference

Name	Type	Required	Default	Description
array	array	Yes		An array from which to get the final index.

Using arrayLen to get the length of a dense array

Uses the arrayLen function to get the total length of a dense array

numberArray = [1,2,3,4];
writeOutput(arrayLen(numberArray));

Expected Result: 4

Using member function to get the length of a dense array

CF11+ Lucee4.5+ Using the len member function is the same as running arrayLen.

colorArray = ['Green','red','blue'];
writeOutput(colorArray.len());

Expected Result: 3

Using arrayLen on a sparse array

Uses the arrayLen function to get the largest index of a spare array

sparseArray = [];
sparseArray[42] = 42;
writeOutput(arrayLen(sparseArray));

Expected Result: 42

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