<template>
  <div>
    <div v-for='item in arr' :key='item'>{{computedArr[item]}}</div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      arr: [1, 3, 4, 5, 5]
    }
  },
  computed: {
    computedArr() {
      return this.arr.reduce((prev, cur) => {
        prev[cur] = cur * cur + 1;
        return prev;
      }, {});
    }
  }
}
</script>

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