JavaScript转换数组2D中的对象数组

Question

I need the following JS structure (results from request-promise query)

[ { idfactura: 2,
    idcuenta: 1,
    nombre: 'Nick',
    periodo: 'Per1                                          ',
    formapago: 'Tarj   ',
    cantidadpersonas: 1,
    subtotal: 7000,
    porcentajedescuento: 0,
    fecha: '24/11/2017 02:38' },
  { idfactura: 3,
    idcuenta: 1,
    nombre: 'Adm',
    periodo: 'Per1                                          ',
    formapago: 'Efec  ',
    cantidadpersonas: 1,
    subtotal: 7000,
    porcentajedescuento: 10,
    fecha: '25/11/2017 23:45' } ]

To the exact following structure (to export in xlsx):

[[2, 1, 'Nick', 'Per1', 'Tarj', 1, 7000, 0, '24/11/2017 02:38'],
 [3, 1, 'Adm', 'Per1', 'Efec', 1, 7000, 10, '25/11/2017 23:45']]

I've tried with _ method, values, JSON.stringify as other posts in Stackoverflow but I am not able to get my exact output struct.

Example Code:

results = [ { idfactura: 2,
    idcuenta: 1,
    nombre: 'Nick',
    periodo: 'Per1                                          ',
    formapago: 'Tarj   ',
    cantidadpersonas: 1,
    subtotal: 7000,
    porcentajedescuento: 0,
    fecha: '24/11/2017 02:38' },
  { idfactura: 3,
    idcuenta: 1,
    nombre: 'Adm',
    periodo: 'Per1                                          ',
    formapago: 'Efec  ',
    cantidadpersonas: 1,
    subtotal: 7000,
    porcentajedescuento: 10,
    fecha: '25/11/2017 23:45' } ]

var arr = Object.key(results).map(function(key){
    return [results[key]];
});

Answer 1

You need to get the values from each object. While there are many ways, one way is where you can get the keys using Object.keys and map the values respectively using map function.

In ES7 you can just get the values of object using Object.values

Also since your array seem to have un-necessary spaces, you need to map them accordingly by trimming the spaces.

 results = [ { idfactura: 2, idcuenta: 1, nombre: 'Nick', periodo: 'Per1 ', formapago: 'Tarj ', cantidadpersonas: 1, subtotal: 7000, porcentajedescuento: 0, fecha: '24/11/2017 02:38' }, { idfactura: 3, idcuenta: 1, nombre: 'Adm', periodo: 'Per1 ', formapago: 'Efec ', cantidadpersonas: 1, subtotal: 7000, porcentajedescuento: 10, fecha: '25/11/2017 23:45' } ] const mappedResults = results.map(result => Object.keys(result).map(key => typeof(result[key]) === "string" ? result[key].trim() : result[key] ) ) console.log(mappedResults) const mappedResultsES7 = results.map(result => Object.values(result).map(value => typeof(value) === "string" ? value.trim() : value ) ) console.log(mappedResultsES7) 

Answer 2

Create an array of keys in the order that you want, then use 2 nested Array#map calls to iterate the array, and then to iterate the keys and extract the data:

 var oredredKeys = ['idfactura', 'idcuenta', 'nombre', 'periodo', 'formapago', 'cantidadpersonas', 'subtotal', 'porcentajedescuento', 'fecha']; var data = [{"idfactura":2,"idcuenta":1,"nombre":"Nick","periodo":"Per1","formapago":"Tarj ","cantidadpersonas":1,"subtotal":7000,"porcentajedescuento":0,"fecha":"24/11/2017 02:38"},{"idfactura":3,"idcuenta":1,"nombre":"Adm","periodo":"Per1","formapago":"Efec ","cantidadpersonas":1,"subtotal":7000,"porcentajedescuento":10,"fecha":"25/11/2017 23:45"}]; var result = data.map(function(o) { return oredredKeys.map(function(key) { return o[key]; }); }); console.log(result);