how to get items in list based on count?

Question

Hi is there any function as if i change the count to 2 in list item of 4 it should return only 2 items.. as shown below this is list of record type ... now based on count i want to retrive items.. like if count is 2 it should give me first 2 list of record types shown below from 4 . 
 List of PRO Lead Documents - 2 items PRO Lead Documents leadId6699(Number (Integer)) workItemId:31206(Number (Integer)) createdBy:"test@scar.com"(Text) workItemFolderId:110429(Number (Integer)) isActive:true(Boolean) updatedBy:"test@scar.com"(Text) documentId:110444(Number (Integer)) documentName:"_Test_Contract_2_"(Text) updatedDt:9/14/2023 2:49 AM EDT(Date and Time) leadDocumentLookupRefId:278(Number (Integer)) createdDt:9/14/2023 2:49 AM EDT(Date and Time) description:""(Text) 
 PRO Lead Documents 
 leadId:6693(Number (Integer)) workItemId:31206(Number (Integer)) createdBy:"test@scar.com"(Text) workItemFolderId:110429(Number (Integer)) isActive:true(Boolean) updatedBy:"test@scar.com"(Text) documentId:110446(Number (Integer)) documentName:"_Test_Contract_2_"(Text) updatedDt:9/14/2023 2:49 AM EDT(Date and Time) leadDocumentLookupRefId:195(Number (Integer)) createdDt:9/14/2023 2:49 AM EDT(Date and Time) description:""(Text) 
 PRO Lead Documents 
 leadId:6692(Number (Integer)) workItemId:31206(Number (Integer)) createdBy:"test@scar.com"(Text) workItemFolderId:110429(Number (Integer)) isActive:true(Boolean) updatedBy:"test@scar.com"(Text) documentId:110446(Number (Integer)) documentName:"_Test_Contract_2_"(Text) updatedDt:9/14/2023 2:49 AM EDT(Date and Time) leadDocumentLookupRefId:195(Number (Integer)) createdDt:9/14/2023 2:49 AM EDT(Date and Time) description:""(Text) 
 PRO Lead Documents 
 leadId:6691(Number (Integer)) workItemId:31206(Number (Integer)) createdBy:"test@scar.com"(Text) workItemFolderId:110429(Number (Integer)) isActive:true(Boolean) updatedBy:"test@scar.com"(Text) documentId:110446(Number (Integer)) documentName:"_Test_Contract_2_"(Text) updatedDt:9/14/2023 2:49 AM EDT(Date and Time) leadDocumentLookupRefId:195(Number (Integer)) createdDt:9/14/2023 2:49 AM EDT(Date and Time) description:""(Text)

Mathieu Drouin · Answer

Not sure if I understood this correctly but there are a couple of ways you could do this: 
 Probably the best way is directly in your query using the batchSize argument coupled with a sort (usually to get the most recent, you would basically sort by a datetime in descending order to get the most recent. 
 a!queryRecordType(
 recordType: 'recordType!{SYSTEM_RECORD_TYPE_USER}User',
 pagingInfo: a!pagingInfo(
 startIndex: 1, 
 batchSize: 2,
 sort: a!sortInfo(
 field: 'recordType!{SYSTEM_RECORD_TYPE_USER}User.fields.{SYSTEM_RECORD_TYPE_USER_FIELD_username}username',
 ascending: false
 )
 )
) 
 The second best way is to do this is to convert your list to a datasubset and use the same approach as above (sort by a field and use batchSize to get the amount that you want. 
 a!localVariables(
 local!items: {
 a!map(
 documentId: 1,
 dateTime: datetime(2023, 09, 01)
 ),
 a!map(
 documentId: 2,
 dateTime: datetime(2023, 08, 01)
 ),
 a!map(
 documentId: 3,
 dateTime: datetime(2023, 07, 01)
 ),
 a!map(
 documentId: 4,
 dateTime: datetime(2023, 06, 01)
 ),
 a!map(
 documentId: 5,
 dateTime: datetime(2023, 05, 01)
 ),

 },
 todatasubset(
 local!items,
 a!pagingInfo(
 startIndex: 1,
 batchSize: 2,
 sort: a!sortInfo(field: "dateTime", ascending: false)
 )
 )
) 
 Finally, a simpler but less powerful way to do this would be with index in combination with enumerate but this would assume that your list was previously sorted beforehand. 
 a!localVariables(
 local!numberOfItems: 2,
 local!items: {
 a!map(
 documentId: 1
 ),
 a!map(
 documentId: 2
 ),
 a!map(
 documentId: 3
 ),
 a!map(
 documentId: 4
 ),
 a!map(
 documentId: 5
 ),
 },
 index(local!items, enumerate(local!numberOfItems)+1)
)