Hey Javascript immortals: Quick Question, i want to summarize duplicate

Question

Hey Javascript immortals: Quick Question, i want to summarize duplicate

Cart Items for an onlineshop to display the quantity instead of X times the same item. this.$store.state.cartItems holds all cart items as an array.
my computed property looks like this:
computed: {
cartItems() {
const ci = []
this.$store.state.cartItems.map((item) => {
const index = ci.indexOf(item)
if (index !== -1) {
ci[index].quantity += 1
} else {
ci.push(item)
}
})
return ci
},
},
but for some reason index is always -1, what do I do wrong here?

0

15.01.2018

4 ответов

12 просмотров

Besto

aaah, I now know what you're asking, I think

0

15.01.2018

Besto

ci is empty

0

15.01.2018

Wojciech Pawlik

R.groupBy(getItemId)

0

16.01.2018

Besto · Accepted Answer

Besto

But why are you pushing

0

15.01.2018

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