How to access a computed property from a method in a Single File Component with Vue.js

I have a normal single file component which has both a computed property and some methods:

<template>...</template>
<script>
...
export default {
    props: ['matches'],
    data: function() {...}  // No problem with these

    computed: {
        formattedMatches: function () {
            let formatted = [];
            this.matches.forEach(function($match, $i, $arr) {
                formatted[$i] = $match[0];
            };
        });
        return formatted;
    }
    ...

    methods: {
        getData: function() {
            return this.formattedMatches();
        },
        ...
    }
}
<script>

When I try to access this.formattedMatches() from the method, I get a [Vue warn]: Error in render: "TypeError: this.formattedMatches is not a function" .

What is the correct way to achieve what I want? Thanks in advance.

You can access computed properties like a property, not like a method:

// correct    
console.log(this.myProperty);

// wrong    
console.log(this.myProperty());

Note: If you treat it as a method with paracentesis () it shall throw an error like this Error in v-on handler: "TypeError: this.myProperty is not a function".