Ultimo aggiornamento il
11 gen 2022
|
Si applica anche a ColdFusion
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 and will return the value.
Returns
Any
Syntax
ArrayReduce(array, callback,[ initialValue=null]) |
History
ColdFusion (2018 release): Changed parameter function to callback.
ColdFusion 11: Added this function.
Parameters
Parameter |
Req/Opt |
Default |
Description |
|---|---|---|---|
| array | Required | The input array. | |
| callback | Required | Closure or a function reference that will be called for each of the iteration . The arguments passed to the callback are
|
|
| initialValue | Optional | Initial value which will be used for the reduce operation. The type is any. |
Example
| <cfscript> arr = [1,2,3,4,5]; function square(element, index) { writeOutput("index is " & index); return element * element; } sq = arrayMap(arr, square); writeDump(sq); result = arrayReduce(sq, function(value, element) { value = value?:0; value += element; return value; }); writeDump(result); </cfscript> |
