Let's say I have an array.
[ '219_1_undefined', '244_1_undefined', '248_1_20///179+25///153', '221_6_undefined' ]
Breakdown for a single item in the array goes by 219_1_undefined basically is 219 is product_id, 1 is the quantity and undefined is the product_options I'm storing these information in local storage. Now I have a new item that needs to be added to the cart, but this product is already in cart so I want to add the quantity alone (middle value). So I want to add 219_1_undefined again to the existing array. Now the array will be look like this.
[ '219_1_undefined', '244_1_undefined', '248_1_20///179+25///153', '221_6_undefined', '219_1_undefined' ]
My problem is I don't know how to add the middle value(quantity) of the same product and get result like
[ '244_1_undefined', '248_1_20///179+25///153', '221_6_undefined', '219_2_undefined' ]
Below is the code I tried
let pid = 219;
let qty = 1;
let params = "undefined";
let string = '219_1_undefined|244|1_undefined|248_1_20///179+25///153|221_1_undefined';
let items = string.split('|');
let nItem = pid+'_'+qty+'_'+params;
let mx = items;
mx = mx.filter(function (item) {
return item.indexOf(pid+'_') !== 0;
});
mx.push(nItem);
var result = mx.toLocaleString();
let nresult = result.split(',').join('|');
console.log(nresult);No matter what I do I still get the wrong output.
You can try getting the index using Array.prototype.findIndex() and update the array item using that index:
let pid = 219;
let qty = 1;
let params = "undefined";
let items = ['219_1_undefined', '244_1_undefined', '248_1_20///179+25///153', '221_1_undefined'];
//get the index of the item from the array by matching the id
let index = items.findIndex(p => p.split('_')[0] == pid);
//check if any item is exist in the array
if(index > -1){
//using the index update the item in the array with the new value
items[index] = pid + '_' + (+items[index].split('_')[1] + qty) + '_' + params;
}
else{
//push new item to the arry
items.push(pid + '_' + qty + '_' + params);
}
console.log(items);let pid = 219;
let qty = 1;
let params = "undefined";
let string = '219_1_undefined|244|1_undefined|248_1_20///179+25///153|221_1_undefined';
let items = string.split('|');
let i = 0;
for(; i < items.length; i++) {
let temp = items[i].split('_');
if (temp[0] == pid && temp[2] == params) {
qty = parseInt(qty) + parseInt(temp[1]);
break;
}
}
items[i] = `${pid}_${qty}_${params}`;
string = items.join('|');
I tested this and it appears to work.The if statement compares botht he ID and param, but obviously you can only have it check the ID if you want.