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Lucee Object Methods Reference
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Object Method Array.insertAt

Inserts a value at the specified position in the array. If the element is inserted before the end of the array, Lucee shifts the positions of all elements with a higher index to make room. 
Array.insertAt(number position,any value):boolean

Arguments

The arguments for this function are set. You can not use other arguments except the following ones.
Name Type Required Description
position number  Yes The numerical index in the array where the new element will be inserted.
Must be less than or equal to the length of the array.
Remember CFML arrays start at 1 not 0.
value any  Yes value to insert