CollectionsExampler

list = {1 2 3 4} list add: 5 //> [1, 2, 3, 4, 5] > list list at: 0 put: 6 //> [6, 2, 3, 4, 5] > list mappedList = list map: [x -> x toString + "s"] //> [1s, 2s, 3s, 4s, 5s] > mappedList mappedList2 = mappedList map: [(it at: 0) digitToInt + 1] //> [2, 3, 4, 5, 6] > mappedList2 emptyList::MutableList::Int = {} emptyList add: 5 //> [5] > emptyList // you can put messages inside collection with braces(because , is optional) collectionWithMessages = {(1 inc) (2 inc) (3 inc inc)} // fold //> 6 >{1 2 3} inject: 0 into: [a, b -> a + b] //> [1, 2, 3] >{3 3 3} inject: #(1 2 3) into: [set, cur -> set add: cur set ] //> {1=false, 2=true, 3=false, 4=true, 5=false} >{3 4 5} inject: #{1 false 2 true} into: [map, cur -> map at: cur put: cur % 2 == 0 map ]

map = #{1 "one" 2 "two"} map at: 3 put: "three" //> {1=one, 2=two, 3=three} >map map forEach: [ k, v -> k inc echo (v at: 0) echo ] // empty collection map2::MutableMap(Int, String) = #{} map2 at: 1 put: "sas" //> {1=sas} >map2

set1 = #(1 2 3) set2 = #(2 3 4) intersect = set1 intersect: set2 >intersect set3 = set1 + set2 + 0 - 4 //> [1, 2, 3, 0] >set3 set4 = set3 - #(3 0) //> [1, 2] >set4 set1 add: 10 set1 remove: 1 //> [2, 3, 10] >set1 // empty collection set::MutableSet::Int = #() set add: 5 //> [5] >set