ArrayReduceRight

Description

Iterates over every entry of the array and calls the closure to work on the elements of the array. This function will reduce the array to a single value from the right to the left  and will return the value.

Returns

Any

Syntax

ArrayReduceRight(array, function(result, item, [,index, array])[, initialValue])

History

ColdFusion (2021 release): Added this function.

Parameters

Parameter

Required/Optional

Description

array

Required

The input array.

function

Required

Closure or a function reference that will be called for each of the iteration. The arguments passed to the callback are

  • result: result of the reduce operation after the previous iteration
  • item: item in the array
  • index : current index for the iteration
  • array : reference of the original array

initialValue

Optional

Initial value which will be used for the reduce operation. The type is any.

Example 1

<cfscript> 
       data = ['1','2','3','4','5','6']; 
       stringConcat = ArrayReduceRight(data,function(previous,next) { 
        return previous & next; 
       },""); 
       writeOutput(stringConcat) 
</cfscript>

Output

654321

Example 2

<cfscript> 
    data=[3,5,7,9,11] 
    result=ArrayReduceRight(data,function(previous,next){ 
        return previous & next 
    },"") 
    writeDump(result) 
</cfscript>

Output

119753

Example 3- member function

<cfscript> 
    data=[3,5,7,9,11] 
    result=data.ReduceRight(function(previous,next){ 
        return previous & next 
    },"") 
    writeDump(result) 
</cfscript>

Output

119753

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