Attempting to make a for in a vue-js object

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Attempting to make a for in a vue-js object

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#2 by (-2 votes)

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I'm trying to loop (for) an array object in Vue-Js, (javascript) whose size is 11 (lenght = 11) as below. But when I do:

console.log (this.grouped) // Here it shows the object with length = 11

  for (var i=0;i<10; i++){
     console.log(i+" Nome:"+this.agrupados.product_name )
  }

The loop does not work. It is as if lenght were null and not 11.

In the chrome inspection it says this:

ThecodeIhaveis:

created(){this.getProducts()//Atualizavaloresareceberconsole.log(this.agrupados)for(vari=0;i<10;i++){console.log(i+" Nome:"+this.agrupados.product_name ) 
    } 
},

javascript vue.js

asked by anonymous 14.06.2018 / 13:10

2 answers

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score 0 · Answer 1

To loop an array in JavaScript there are basically three forms:

1 . Javascript classic (using the for with a counter):

const arrayExemplo = ['A', 'B', 'D'];

for (let i = 0; i < arrayExemplo.length; i++) {
    console.log('${i} ${arrayExemplo[i]}');
}

2 . Javascritp modern (uses the structure for ... of ):

const arrayExemplo = ['A', 'B', 'D'];

for (const value of arrayExemplo) {
    console.log('${value}')
}

3 . Using the forEach ( which is part of the Array object).

const arrayExemplo = ['A', 'B', 'D'];

arrayExemplo.forEach(function(item, index) {
    console.log('${index} ${item}');
})

score -2 · Answer 2

const user = {}; user.name = "Eduardo"; user.idade = 21;

for(let item in user){

 // item =>  Nome da propriedade
 // user[item] => Valor da propriedade

 console.log( item + ' => ' + user[item] )

}