computed variables vue code example

Example 1: cannot access this from computed vuejs

computed:{
                // Get data from vuex
                $currency(){
                    return this.$store.state.currency
                }
            },

Example 2: vue computed

var vm = new Vue({
  el: '#example',
  data: {
    message: 'Hello'
  },
  computed: {
    // a computed getter
    reversedMessage: function () {
      // `this` points to the vm instance
      return this.message.split('').reverse().join('')
    }
  }
})