how to sort firebase auto generated key?

问题

I am working with firebase real time database. Every time I push the data into the firebase using push method it auto generates a key like this "-L1GgaMStpwEV4N3sQad" to my best knowledge it's generated based on time also.

So my question is there any way to sort the key asce or in desc?.

I have attached image of firebase auto generated.

Thanks in advance.

回答1:

I new to firebase but here's my observation : The unique keys that are generated are already sorted in Lexicographical order. Have a closer look at your objects: -L1GgaM is common for all keys (except last which ends with 'N')

Also, remember that capital letters have lower ASCII value than their counterpart.

来源：https://stackoverflow.com/questions/49276009/how-to-sort-firebase-auto-generated-key