Add zhash value type

[vrongmeal]

It would be great to have a "zhash" in standard set of values. This would be similar to zset (or scored set) with the difference that a zhash will have a value along with the score.

A zset can be thought of as:

Key	Score
key_one	10
key_two	20
key_three	30

whereas a zhash will be:

Key	Score	Value
key_one	10	val_one
key_two	20	val_two
key_three	30	val_three

For documentation on how to add a new value type, see: https://kiwi.sdslabs.co/docs/add-new-value-type.html

[carmo-evan]

I'd like to take a stab at this, if that's ok.

[vrongmeal]

I'd like to take a stab at this, if that's ok.

@carmo-evan Go ahead. That would be awesome!

[carmo-evan]

@vrongmeal Hi! Sorry, I just had a chance to look into it yesterday.

From what I can gather, zhash will be very similar to zset, and we can probably use the same underlying sortedSet value.

What would you like the API to be like? Do you want to be able to insert the value together with they key in the INSERT method, or do you want to do it in two steps - insert the key, and then update to set the value and the score?

Thank you!

[vrongmeal]

When inserting, you can do both the things. Parameters are dynamic. So if you get one parameter you can just insert it, if you get two, you can insert while setting the value. There will always be a "SET" action if someone wants to insert the key and then set the value.

[carmo-evan]

PR is up here #17

[vrongmeal]

Closed through #17