Javascript中两个数组的连接

Question

I need to join two arrays, from the server I get the next json. an array that says "data" that has 2 objects and another that is called "Doc" that is made up of 4 objects.

I want to create a matrix that contains 8 elements equal to the following (I did it by hand):

[
    {
        "idlibrosiva": 1,
        "iddoc": 1,
        "false": 1
    },{
        "idlibrosiva": 1,
        "iddoc": 2,
        "false": 1
    },{
        "idlibrosiva": 1,
        "iddoc": 3,
        "false": 1
    },{
        "idlibrosiva": 1,
        "iddoc": 4,
        "false": 1
    },{
        "idlibrosiva": 2,
        "iddoc": 1,
        "false": 1
    },{
        "idlibrosiva": 2,
        "iddoc": 2,
        "false": 1
    },{
        "idlibrosiva": 2,
        "iddoc": 3,
        "false": 1
    },{
        "idlibrosiva": 1,
        "iddoc": 4,
        "false": 1
    }]

This is what I get from the server in json

    {
"status": "success",
"code": 200,
"data": [
    {
        "idlibrosiva": 1,
        "nombre": "Compras",
        "descripcion": "Art.-141 C.T.",
        "estado": 1
    },
    {
        "idlibrosiva": 2,
        "nombre": "Contribuyentes",
        "descripcion": "Artículo 141. C.T.- ",
        "estado": 1
    },

],
"Doc": [
    {
        "**iddoc**": 1,
        "documento": "CREDITO FISCAL",
        "descripcion": "ART. 107 C.C.",
        "estado": 1
    },
    {
        "iddoc": 2,
        "documento": "NOTA DE CREDITO",
        "descripcion": "ART. 110 C.C- ",
        "estado": 1
    },
    {
        "iddoc": 3,
        "documento": "FACTURA",
        "descripcion": "ART. 107 C.C.",
        "estado": 1
    },
    {
        "iddoc": 4,
        "documento": "NOTA DE DEBITO",
        "descripcion": "ART. 110 C.C.-",
        "estado": 1
    },
       ],
"mensaje": "Todo se ha cargado correctamente"}

I tried to do it like this:

this.Info = response.data;
                this.liva = response.data.filter((item) => item.estado == 1);
                this.docs = response.Doc.filter((item) => item.estado == 1);
                this.DocYlib = this.liva.map((item)=>{
                    const DocumentoUtilizado = new ModeloDocUtilizadosIVA();
                    DocumentoUtilizado.Libro = item.idlibrosiva;
                    DocumentoUtilizado.estado = false;
                    DocumentoUtilizado.documento = this.docs.map((item) => item.iddoc);
                    return DocumentoUtilizado;
                })

But the result has been:

Answer 1

You can use reduce , map and concat

var output = obj.Doc.reduce( (acc, c) => 
     acc.concat( obj.data.map( s => 
      ({ idlibrosiva : s.idlibrosiva, iddoc : c.iddoc, "false": 1 })  //return new object from map callback
     ) //concat statement ended
) , []) //initialize accumulator to []

Demo

 var obj = { "status": "success", "code": 200, "data": [{ "idlibrosiva": 1, "nombre": "Compras", "descripcion": "Art.-141 CT", "estado": 1 }, { "idlibrosiva": 2, "nombre": "Contribuyentes", "descripcion": "Artículo 141. CT- ", "estado": 1 }, ], "Doc": [{ "iddoc": 1, "documento": "CREDITO FISCAL", "descripcion": "ART. 107 CC", "estado": 1 }, { "iddoc": 2, "documento": "NOTA DE CREDITO", "descripcion": "ART. 110 CC- ", "estado": 1 }, { "iddoc": 3, "documento": "FACTURA", "descripcion": "ART. 107 CC", "estado": 1 }, { "iddoc": 4, "documento": "NOTA DE DEBITO", "descripcion": "ART. 110 CC-", "estado": 1 }, ], "mensaje": "Todo se ha cargado correctamente" }; var output = obj.Doc.reduce((acc, c) => acc.concat(obj.data.map(s => ({ idlibrosiva: s.idlibrosiva, iddoc: c.iddoc, "false": 1 }) //return new object from map callback ) //concat statement ended ), []) //initialize accumulator to [] console.log(output); 

Answer 2

The requirement is to map each object from "data" to each object from "Doc".

Let us extract them individually.

const { data, Doc:doc } = response;
// aliasing Doc as doc, just for variable declaration convention.

Now iterate through both using forEach and push the desired objects in result array.

const result = [];
data.forEach(dataObj => {
  const { idlibrosiva } = data;
  doc.forEach(docObj => {
    const { iddoc } = doc;
    result.push({
      idlibrosiva,
      iddoc,
      'false': 1
    };
  };
};

console.log('result --> ', result);