Rearrange my array index in angular typescript

Question

I have two cards in my application.

In my first card, this have index 0, my second card have index 1.

I have one variale called listAtributos that has this scructure:

0: {indexvariacaoatributo: 0, id: 5, tipovariacao: "Cor", valorvariacao: "Azul"}
1: {indexvariacaoatributo: 0, id: 7, tipovariacao: "Tamanho", valorvariacao: "P"}
2: {indexvariacaoatributo: 1, id: 6, tipovariacao: "Cor", valorvariacao: "Amarelo"}
3: {indexvariacaoatributo: 1, id: 7, tipovariacao: "Tamanho", valorvariacao: "P"}

Have one relationship in the index of my card and the index of my listAtributst (indexvariacaoatributo), through this, my elements is show in my card.

Exemple:

In card 0, that have index 0, will be show the follow items:

0: {indexvariacaoatributo: 0, id: 5, tipovariacao: "Cor", valorvariacao: "Azul"}
1: {indexvariacaoatributo: 0, id: 7, tipovariacao: "Tamanho", valorvariacao: "P"

In card 1, that have index 1, will be show the follow items:

2: {indexvariacaoatributo: 1, id: 6, tipovariacao: "Cor", valorvariacao: "Amarelo"}
3: {indexvariacaoatributo: 1, id: 7, tipovariacao: "Tamanho", valorvariacao: "P"}

At any given moment i need to remove one card. In this case, my index of listAtributos.indexvariacaoatributo will wrong.

I try to make a algoritm that have update listAtributos.indexvariacaoatributo conforms according the index.

Exemple:

If i exclude the card 0 , the indexvariacaoatributo that where 1, must be update to 0.

If i exclude the card 1, the indexvariacaoatributo that where 0, must be updated to 1.

I try something like:

 for(let i=0;i<this.listAtributos.length;i++){
  if(this.listAtributos[i].indexvariacaoatributo == index){
    this.listAtributos[i].indexvariacaoatributo = index - 1;
  }
}

But not works. And i don't think in other algoritm now.

Can somebody help me? Sorry for my english.

Riad Baghbanli · Accepted Answer · 2018-11-09 16:53:58Z

2

Make each card to have some kind of generated number, call it cardId. Then do not store card index in indexvariacaoatributo, but corresponding card cardId instead. Now, for each element of listAtributos you get cardId, then filter thru all cards to get one card with corresponding cardId.

answered Nov 9, 2018 at 16:53

Riad Baghbanli

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