tstorage | An embedded time-series database | Database library
kandi X-RAY | tstorage Summary
kandi X-RAY | tstorage Summary
tstorage is a lightweight local on-disk storage engine for time-series data with a straightforward API. Especially ingestion is massively optimized as it provides goroutine safe capabilities of write into and read from TSDB that partitions data points by time.
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QUESTION
I need to create an iterator that owns the value (allows to wrap the trait object to Rc
) and return it as next()
value (playground):
ANSWER
Answered 2021-Apr-20 at 10:45As Stargateur notes, Iterator
already has a built-in cloning adapter: Iterator::cloned
. So you can just use that to get an Iterator<_>>
, then cast that to the relevant trait object:
QUESTION
I don't why I am getting this. I use this code to show album cover. Most of the albums/sub albums are working fine. But there are 2 of them that would throw error: Fatal error [0]: array_key_exists() expects parameter 2 to be array, null given
Any pointers will be highly appreciated. Thank you.
...ANSWER
Answered 2021-Mar-27 at 14:47We don't know why your variable is not an array. Acyually error message describes it quite well, for some reason some of $this->output[$album_key]
are just null
. You need to debug it yourself and fix it if required, as we have no access to your data.
However safest way to get rid such errors is usually checking if variable is array before you'll try to get or modify its data:
QUESTION
Is it possible to create a table on spark using a select statement?
I do the following
...ANSWER
Answered 2017-Jan-22 at 11:02You should first do a select and assign it to a dataframe variable and then register it with registerTempTable
as you do with the dataframe created from the CSV file
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