fdb opened a new issue, #59:
URL: https://github.com/apache/arrow-js/issues/59
### Describe the bug, including details regarding any error messages,
version, and platform.
When creating a table using regular JavaScript Array syntax, the resulting
`Vector` gives unexpected results:
```js
import { tableFromArrays } from
'https://cdn.skypack.dev/apache-arrow@15.0.2';
const table = tableFromArrays({
a: new Float64Array([100, 200, 300]),
b: [100, 200, 300],
});
console.log('Table rows:', table.numRows);
const vectorA = table.getChild('a');
const vectorB = table.getChild('b');
console.log('Length of "a":', vectorA.length);
console.log('Length of "b":', vectorB.length);
console.log('Element "a" at index 3:', vectorA.get(3));
console.log('Element "b" at index 3:', vectorB.get(3));
console.log('Element "a" at index 100:', vectorA.get(100));
console.log('Element "b" at index 100:', vectorB.get(100));
console.log('Vector "a" internal data length:',
vectorA.data[0].values.length);
console.log('Vector "b" internal data length:',
vectorB.data[0].values.length);
```
The output is:
```
Table rows: 3
Length of "a": 3
Length of "b": 3
Vector "a" at index 3: undefined
Vector "b" at index 3: 0
Vector "a" at index 100: undefined
Vector "b" at index 100: undefined
Vector "a" internal data length: 3
Vector "b" internal data length: 8
```
I would expect "b" to also return `undefined` for elements outside of its
length. Instead it returns zero.
I noticed that the internal length of the `Float64Array` is 8 instead of 3,
I suspect this has something to do with it?
Here's an online playground that shows the issue:
https://stackblitz.com/edit/vitejs-vite-9k7gaz?file=main.js
### Component(s)
JavaScript
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