Extending new keys to Map array

Question

Hello everyone, 
 Please have a look at below code: local!array1: {
 a!map(id: 1, name: "Name1"),
 a!map(id: 2, name: "Name2")
 },
 local!array2: a!forEach(
 items: enumerate(10),
 expression: concat("key", tostring(fv!index))
 ), 
 here i want to extend array1 map key from array2, which is dynamically generated through array2 and values should be the value of id from array1. 
 so i am expecting the new array would be like this: 
 {
 a!map(
 id: 1,
 name: "Name1",
 key1: 1,
 key2: 1,
 key3: 1,
 key4: 1,
 key5: 1,
 key6: 1,
 key7: 1,
 key8: 1,
 key9: 1,
 key10: 1
 ),
 a!map(
 id: 2,
 name: "Name2",
 key1: 2,
 key2: 2,
 key3: 2,
 key4: 2,
 key5: 2,
 key6: 2,
 key7: 2,
 key8: 2,
 key9: 2,
 key10: 2
 )
 } 
 
 any easiest way to do this. Thanks in advance

Shanmathi Ponnusamy · Accepted Answer

Hi Shahid 
 Is this what you are expecting? Here as you said , array 2 is dynamic and map in Array 1 takes the key from array 2 and update it with its ID. 
 a!localVariables(
 local!array1: {
 a!map(id: 12, name: "Name1"),
 a!map(id: 44, name: "Name2")
 },
 local!array2: {
 fullName: "john",
 address: "ABC",
 phoneNum: "876546",
 gender: "Male",
 company: "XYZ",
 dept:"IT"
 },
 local!labelNamesInArray2: a!keys(local!array2),
 local!n: length(local!labelNamesInArray2),
 a!forEach(
 items: local!array1,
 expression: a!localVariables(
 local!id: index(fv!item, "id", null),
 a!update(
 fv!item,
 local!labelNamesInArray2,
 repeat(local!n, local!id)
 )
 )
 )
)

Stefan Helzle · Answer

Can I win something here? 
 a!localVariables(
 local!array1: {
 a!map(id: 1, name: "Name1"),
 a!map(id: 2, name: "Name2")
 },
 local!n: 10,
 a!forEach(
 items: local!array1,
 expression: a!update(
 fv!item,
 apply(concat(_,_), merge(repeat(local!n, "key"), 1+enumerate(local!n))),
 repeat(local!n, fv!index)
 )
 )
) 
 BTW, the apply() can be replaced by a foreach(). 
 Where is this challenge coming from?

Extending new keys to Map array

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