[Vuejs]-How to get computed property data in method in Vue js?

Ignoring the reverse, here is way to work with store data and computed properties.

computed: {
    items () {
        return this.$store.state.wishlist.items
    },
    itemCount () {
        // assuming this.$store.state.wishlist.items is array
        return this.items.length
    }
},
methods: {
    getPosts () {
        for (i = 1; i <= this.itemCount; i++) {
            this.posts.push({
                first: 'John',
                last: 'Doe',
                suffix: '#' + i
            })
        }
    }
}