monoton | Highly scalable , single/multi node | Database library
kandi X-RAY | monoton Summary
kandi X-RAY | monoton Summary
Highly scalable, single/multi node, predictable and incremental unique id generator with zero allocation magic.
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Top functions reviewed by kandi - BETA
- ToBase62WithPaddingZeros converts u to base62 .
- NextBytes implements the Monoton interface .
- New returns a new Monoton instance .
- NewSecond returns a new sequence .
- NewMillisecond creates a new Sequence .
- Base62ByteSize returns the size in bytes of u .
- NewNanosecond returns a Sequence .
monoton Key Features
monoton Examples and Code Snippets
Community Discussions
Trending Discussions on monoton
QUESTION
I have two monotonic increasing vectors, v1
and v2
of unequal lengths. For each value in v1
(e.g., v1[1], v1[2], ...
), I want to find the value in v2
that is just less than v1[i]
and compute the difference.
My current code (see below) works correctly, but does not seem to scale up well. So I am looking for recommendations to improve my approach with the requirement of staying in R, or using a package I can call from R.
Example code:
...ANSWER
Answered 2021-Jun-09 at 12:59Use findInterval
:
QUESTION
I am working on a charting module where I can pass on dataframe and the module will create reports based on plots generated by calling few functions as mentioned below.
I am using Altair for plotting and "Datapane" for creating the report, the documentation of the same can be found here : https://datapane.github.io/datapane/
My DataFrame looks like this
...ANSWER
Answered 2021-Jun-02 at 10:21I had a similar problem and solved it as follows
- create a list to store the pages or elements of the report, such as
- report_pages=[]
- report_pages.append(dp.Page)
- report_pages.append(dp.Table)
- report_pages.append(dp.Plot)
- At the end just generate the report with a pointer to the list
- dp.Report(*pages)
In your case, I think you can do the following
- create a list
- rows=[]
- add the rows to the list
- rows.append(row_1)
- rows.append(row_2)
- and then create the report with
- r= dp.Report(*rows)
I found this solution on datapane's github https://github.com/datapane/gallery and then in the notebook https://mybinder.org/v2/gh/khuyentran1401/Machine_Learning/ce7fae1c5d9fab8eefcd624674c10afaa1704bbd?filepath=machine_learning%2FSVM_Decision_Boundary%2FDecision_Boundary_SVM.ipynb in the last line of code.
I hope to have helped.
QUESTION
I have a requirement where I need to show the values between 1,2 as a group and 2,3 as a seperate group. I am trying to customise the x-axis but it's not working
In the above picture I need to show the bars 3 and 3.5 together with miminum gap between them and in sameway 4 and 4.5 together
and this is my code
...ANSWER
Answered 2021-Jun-01 at 16:06I assume your data looks like this:
QUESTION
I'm having trouble in setting up a task migrating the data in a RDS Database (PostgreSQL, engine 10.15) into an S3 bucket in the initial migration + CDC mode. Both endpoints are configured and tested successfully. I have created the task twice, both times it ran a couple of hours at most, the first time the initial dump went fine and some of the incremental dumps took place as well, the second time only the initial dump finished and no incremental dump was performed before the task failed.
The error message is now:
...ANSWER
Answered 2021-Jun-01 at 05:03Should anyone get the same error in the future, here is what we were told by the AWS tech specialist:
There is a known (to AWS) issue with the pglogical plugin. The solution requires using the test_decoding plugin instead.
- Enforce using the test_decoding plugin on the DMS Endpoint by specifying pluginName=test_decoding in Extra Connection Attributes
- Create a new DMS task using this endpoint (using the old task may cause it to fail due to dissynchronization between the task and the logs)
It sure did resolve the issue, but we still don't know what the problem really was with the plugin that is strongly suggested everywhere in the DMS documentation (at the moment).
QUESTION
I am looking for a way to display month numbers in such a way as seen below for a line chart using Recharts library:
As you can see, the chart starts with the first month of each year for 4 years of total data in the x-axis and the month increments by 2 for each year. Each year has a reference line, with the thicker stroke referenceline being the current year and month followed by future months including the next year first month as displayed.
How can I display the ticks on the x-axis along with the month numbers for each year which is denoted with the reference lines (except the beginning of the line chart should not have a reference line)? I am new to react and also to recharts so bear with me. Below is the code I have so far in the recharts components which only takes into account the year at the reference lines as a placeholder:
...ANSWER
Answered 2021-May-19 at 12:02It seems to me that you want a ReferenceLine every 12 months (or ticks), rather than a ReferenceLine on a specific year.
Assuming that your data array has one value per month of each year, you could have your LineChart this way:
QUESTION
I'm having trouble deploying a simple Flask app behind a Nginx reverse proxy. The app is the one found at https://docs.docker.com/compose/gettingstarted/
I'm trying to make the app show up at subdomain.example.com/flask
but with the current configuration it doesn't work. What i'm missing?
Now my docker-compose.yml
looks like this:
ANSWER
Answered 2021-May-16 at 14:41You need to have a ports
directive for nginx's service. Even if ports are exposed by an image by default, those do not automatically get bound to the host as in ports
.
QUESTION
I am using a ComposedChart and shoing bars and the line. Usually the line should start from 0 of x-axis. But when using the Composed Chart Not able to do that
If you observe in the above picture tick a should be starting at x axis (the 0 point where x and y axis started) But it's not
This is the code I am using
...ANSWER
Answered 2021-May-14 at 05:33According to this github issue, You need to add scale="point"
in your XAxis
QUESTION
Redshift's ROW_ID
column is somewhat similar to PostgreSQL's OID
column.
That's a "unique" key for each record in a table, a hidden column added to each table.
Would you expect ROW_ID
to be wrapped at some point?
In PostreSQL, OID
column are 32 bits only -
OIDs are implemented using 4-byte unsigned integers. They are not unique–OID counter will wrap around at 2³²-1. OID are also used to identify data types (see /usr/include/postgresql/server/catalog/pg_type_d.h).
Because of the wrapping, OIDs in PostgreSQL are not truly unique.
What's scale of ROW_ID
in RedShift? Are they expected to be wrapped at some point? Can we expect ROW_ID
to be unique? To be monotonically increasing?
Can't find documentation on this.
ps. ROW_ID
is documented at least here https://docs.amazonaws.cn/en_us/redshift/latest/dg/c_load_compression_hidden_cols.html but it might has been removed in later versions of Redshift? Thanks
ANSWER
Answered 2021-May-12 at 12:19It's an int8
, so 64 bits. You can examine it via pg_attribute
. The system tables indicate raw
encoding, which I think I recall looked plausable for how that column was behaving (but the behaviour of the other two system columns (the MVCC columns) does not fit with raw
, and I thought they used to be marked as runlength
).
I've wondered if it's really used, since I believe in Postgres it was phased out, but Redshift is originally from Postgres 8, and I think at that point it was still in use.
As for monotonical increment, I've not looked, but I doubt it - you'd have to have some central point handing out numbers, which would be a serious bottleneck. I might guess it acts like an identity
column, where each slice independently generates numbers, so you end up with unique numbers, and always ascending, but not contiguous or monotonic. If I remember correctly you cannot query the system columns using SELECT
(unlike Postgres). You have a limited ability to see their values using minvalue
and maxvalue
from STV_BLOCKLIST
, as int8
is used directly to compute its sortkey value, so if you write a single row into a table, you can see it's value, by examining its sortkey value. So if you write one row, then a second row, then delete the first row, then vacuum, then assuming no row renumbering occurs (which actually it might well do - Postgres does, when it vacuums), then you'll see the value for the second row. Remember to use a sortkey column, always with the same value, to keep all your rows on one slice, so the rows you're adding do in fact all end up in the same block.
QUESTION
I have been using the following references to try to determine if a Point is inside of a 2D Polygon that has Arcs:
Is a point inside of 2D polygon, no curves
Is a point inside a compound polygon (C#)
Is a point inside a curve (Theory)
My approach uses Ray Casting to determine if a point is within the polygon boundary. This is my code that attempts to string the references together (C#):
...ANSWER
Answered 2021-May-10 at 15:55I asked this question in the AutoDesk .NET Forum and recieved this solution: The Answer
QUESTION
I would like to smooth a survival curve so it has no 'steps'. With the following data I am trying this:
...ANSWER
Answered 2021-May-10 at 09:03Add ylim(0:1)
to your code:
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