chunk([1,2,3,4,5],2) => [[1,2],[3,4],[5]]
pluck([{name:"a"},{name:"b"}],"name") => ["a", "b"]
Array.range(5) --> [0,1,2,3,4]
uniqueArray([{name:"a"},{name:"b",age:'23'},{name:'a'}],'name')=>[{name: "a"}, {name: "b", age: "23"}]
[1,[123,1,[123]],3]=>[1,123,1,123,3]