Parameter
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26 thg 12, 2022
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Cũng áp dụng cho ColdFusion
Description
Iterates over every entry of the list and calls the closure function to work on the item of the list. The returned value will be set at the same index in a new list and the new list will be returned.
Returns
List
Syntax
ListMap(list, callback [,delimiter, includeEmptyFields])
History
ColdFusion (2018 release): Introduced named parameters.
ColdFusion 11: Added this function.
Parameters
|
|
Req/Opt |
Default |
Description |
|---|---|---|---|
|
list |
Required |
|
The input list. |
|
callback |
Required |
|
Closure or a function reference that will be called for each iteration. The arguments passed to the callback are
|
|
delimiter |
Optional |
comma (,) |
The list delimiter. The type is string . |
|
includeEmptyFields |
Optional |
false |
Include empty values. The type is boolean. |
Example
<cfscript>
myList="Tokyo,Bangkok,Jakarta,Manila,Bangalore,Shanghai";
closure=function(item){
return reverse(item); // Reverses each list item
}
myMap=ListMap(myList,closure);
WriteOutput(myMap);
</cfscript>
Output
oykoT,kokgnaB,atrakaJ,alinaM,erolagnaB,iahgnahS
