Hyperbee put with the same key

[akachi1409]

I am using hyperbee and have a question.

bee.put('key', 'value')

If I put in hyperbee with the same key twice, what will happen?
The first one is replaced with the second one, or two will be added with the same key?

[LuKks]

It will append a new block again, so you will end up with the same value added twice

If you want to avoid re-appending the same value then you can use the cas option like this:

const sameData = require('same-data')

await bee.put(ket, value, { cas })

function cas (prev, next) {
  return !sameData(prev.value, next.value)
}

You can use same-object if the value is more complex, otherwise for simple values then same-data is good

[LuKks]

Btw if you want to "inspect" the Hyperbee then you can access to the Hypercore at bee.core, so you can do:
console.log(await bee.core.get(0)) and same for any index 1, 2, etc this way you will verify that it actually inserts the block twice, and the cas option fixes it