Is there a way to create an associative array without causing an error due to the lambda sign in the syntax? I prefer not to use an object because the key must be a string with capital letters and spaces.
<script>
export default {
name: 'VueHeader',
data() {
return {
links : ['Dashboard' => '/dashboard', 'Account' => '/account'],
}
}
}
</script>
<script>
export default {
name: 'VueHeader',
data() {
return {
links : {'Home': '/home', 'About': '/about'},
};
}
}
</script>
Utilizing strings as keys in JavaScript objects can be very useful. This is because the case of the string matters, for example 'Foo' !== 'foo'. To illustrate this concept further, consider the following example:
> x = {"foo": 10, "Foo": 20, "foo bar": 15}
{ foo: 10, Foo: 20, 'foo bar': 15 }
> x['Foo']
20
> x['foo']
10
> x['foo bar']
15
Just like another response mentioned, in JavaScript plain objects function as associative arrays:
...
links : {'My Dashboard': '/dashboard', 'My Account': '/account'},
...
Keys can be any string. If a key includes spaces or other special characters, you can access it using bracket notation. This is supported in Vue templates because it's a basic JS feature:
{{links['My Dashboard']}}
The issue with plain objects is that the order of keys is not guaranteed by specifications, even though it tends to stay consistent across different implementations.
An updated solution that ensures key order is the ES6 Map. Currently, it's not reactive in Vue and can only replace plain objects for static data:
...
links : new Map([['My Dashboard', '/dashboard'], ['My Account': '/account']]),
...
JavaScript does not support associative arrays, so arrays must have integer indexes in ascending order.
Alternatively, you can use an object and access properties using array notation like this:
const menu = { 'Home' : '/home', 'About' : '/about' };
console.log(menu['Home']);
console.log(menu['About']);
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