How do I convert an array of objects to an array of arrays in javascript? I did this, but it returns an array of objects
var items1 = new Array();
$.map(objResposta, function(value,index) {
teste = new Array();
items1.push(value);
teste.push(items1);
});
I need the values that are in red to stay in the array this way:
Array [ ['resposta atualizada', 5], ['esse foi', 4] ]
You already have an array ... an array of objects, you have to convert to an array of arrays.
You can do it like this:
const array = [{
nomePergunta: 'resposta atualizada',
quantidadeResposta: 5
}, {
nomePergunta: 'esse foi',
quantidadeResposta: 4
}];
const novaArray = array.map(el => Object.keys(el).map(key => el[key]));
console.log(JSON.stringify(novaArray));The idea is:
Like Mr. Felix mentioned in the ES7 version there is a new method for Objects, the Object.values . In this case it's even simpler:
const novaArray = array.map(Object.values);
const array = [{
nomePergunta: 'resposta atualizada',
quantidadeResposta: 5
}, {
nomePergunta: 'esse foi',
quantidadeResposta: 4
}];
const novaArray = array.map(Object.values);
console.log(JSON.stringify(novaArray));With the ECMAScript 2017+ you can do the following:
var arrays = objetos.map(function(obj){return Object.values(obj)});
Being objetos is your array of objects.
Chrome version 55, for example, already works.
As a suggestion for @Sergio ♦, you can simplify it even more:
var arrays = objetos.map(Object.values);
Another approach is to use a classic iterator (although I prefer map), read the properties of the object, add in a temporary array to add to the new array of arrays:
var array = [{
nomePergunta: 'resposta atualizada',
quantidadeResposta: 5
}, {
nomePergunta: 'esse foi',
quantidadeResposta: 4
}];
var novoArray = [];
array.forEach(function(item){
var tmp = [];
for (var property in item){
tmp.push(item[property]);
}
novoArray.push(tmp);
});
console.log(JSON.stringify(novoArray));