About

oa2o (object array to object) is a simple npm module to convert iterative object array ( [{k:"a"}, {k:"b"}] ) to object ( {a:{k:"a"}, b:{k:"b"}} ):

let oa = [{k:"a"}, {k:"b"}];
let ob = oa2o(oa, "k");
console.log(ob); // ob = {a:{k:"a"}, b:{k:"b"}}

eg2

let oa = [{k:"a", k2:"a2"}, {k:"b", k2:"b2"}];
let ob = oa2o(oa, "k", "k2"); // ob = {a:"a2", b:"b2"}

eg3

let oa = [{k:"a", k2:"a2", k3:"a3"}, {k:"b", k2:"b2", k3:"b3"}];
let ob = oa2o(oa, "k", ["k2","k3"]); // ob = {a:{k2:"a2",k3:"a3"}, b:{k2:"b2", k3:"b3"}}

eg4 (rename object key)

let oa = [{k:"a", k2:"a2"}, {k:"b", k2:"b2"}];
let ob = oa2o(oa, "k", [["k2","n2"]]); // ob: {a:{n2:"a2"}, b:{n2:"b2"}}

eg5 (rename + get nested object key value)

let oa = [
  { k: "a", k2: { k3: 3 } },
  { k: "b", k2: { k3: 5 } },
];
let ob = oa2o(oa, "k", [["k2.k3", "n2"]]); // ob: { a: { n2: 3 }, b: { n2: 5 } }
let ob = oa2o(oa, "k", [[["k2","k3"], "n2"]]); // 2nd way

Installation

npm i oa2o

Syntax & Parameters

oa2o(ar, key[, valKey])

• ar = (array) object array ( [{k:"a"}, {k:"b"}] )
• key = (string) key in object array; the value of this specified key will be used as the key for new object; usually choose key with unique value.
• valKey = (string|array) key in object array; the value of this specified key will be used as the value for the key in new object, instead of the whole original object element.

return

return object

Advanced

Return object with shallow copy.