dual | Go implementation of dual numbers | Math library

by tamnd Go Version: Current License: MIT

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kandi X-RAY | dual Summary

dual is a Go library typically used in Utilities, Math applications. dual has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

The dual package defines the Dual type to represent dual numbers. For simple explaination, see the blog post by Simon. In linear algebra, the dual numbers extend the real numbers by adjoining one new element ε with the property ε^2 = 0 (ε is nilpotent), in a similar way that complex numbers adjoin the imaginary unit i with the property i*i=-1.

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Support

dual has a low active ecosystem.

It has 8 star(s) with 0 fork(s). There are 1 watchers for this library.

It had no major release in the last 6 months.

dual has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of dual is current.

Quality

dual has no bugs reported.

Security

dual has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

dual is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

dual releases are not available. You will need to build from source code and install.

Installation instructions are not available. Examples and code snippets are available.

Top functions reviewed by kandi - BETA

kandi has reviewed dual and discovered the below as its top functions. This is intended to give you an instant insight into dual implemented functionality, and help decide if they suit your requirements.

Div returns the two dual .
New returns a Dual .
FromFloat creates a Dual from a float .
Real returns the real decimal .
Pepsilon returns the epsilon .
Add returns the dual .
Sub returns the subtract .
Mul returns the dual .

Get all kandi verified functions for this library.

dual Key Features

No Key Features are available at this moment for dual.

dual Examples and Code Snippets

No Code Snippets are available at this moment for dual.

Community Discussions

Trending Discussions on dual

XML path aggregation: one subquery for multiple `selects` on same subset

How to execute multiple MERGE INTO query on Oracle DB from Node.js

Merge Missing Dates With The Actual Query

How we can display ASCII code for single quote in SQL?

Performance problem with QUERY using BIND variables and OR condition in Oracle 12.2

skip deleting records when a child record is found

How to generate the first day of the week, the last day of the week and week number between two dates in Oracle

SQL3 error inconsistent data types while executing a method

How can I implement a select list in apex oracle's interactive grid using only sql and what's available in oracle APEX?

How can I return a SELECT query with an oracle function?

QUESTION

XML path aggregation: one subquery for multiple `selects` on same subset

Asked 2021-Jun-14 at 15:55

When using XML path for aggregation, many times I need different strings which are based on the same set. Consider this example (script at the end):

...

ANSWER

Answered 2021-Jun-14 at 13:34

You can't quite do this without an extra subquery, but you can avoid querying the same table again and again.

All you need to do, is to get the data into a single XML blob in one subquery, then query it back out in each of the other subqueries:

Source https://stackoverflow.com/questions/67968708

QUESTION

How to execute multiple MERGE INTO query on Oracle DB from Node.js

Asked 2021-Jun-14 at 12:48

I am trying to run MERGE INTO query on OracleDB in forEach loop on Node.js code. But only the first query executing and all other failings.

Code:

...

ANSWER

Answered 2021-Jun-14 at 12:48

Answering my own question so it can help other who have similar issue like this.

So after research on my issue and based on comments I can conclude that through bind variables and executeMany() method we can achieve our goal.

Step 1: Prepare your bind parameters like below:

Source https://stackoverflow.com/questions/67881781

QUESTION

Merge Missing Dates With The Actual Query

Asked 2021-Jun-14 at 09:28

I am working on a query where a database may have all dates with corresponding data or may not have. Data in the table are as follows:

...

ANSWER

Answered 2021-Jun-14 at 09:25

To me, it looks as the following query; read comments within code:

Source https://stackoverflow.com/questions/67967585

QUESTION

How we can display ASCII code for single quote in SQL?

Asked 2021-Jun-14 at 07:14

I got the answer but can someone please explain me how and why we need to use extra single quote????

...

ANSWER

Answered 2021-Jun-14 at 07:14

Because you have to escape it.

string literal begins with a single quote
another one terminates the string ...
... unless it is immediately followed by another single quote which "escapes" it

For example: this is what you have:

Source https://stackoverflow.com/questions/67965903

QUESTION

Performance problem with QUERY using BIND variables and OR condition in Oracle 12.2

Asked 2021-Jun-12 at 13:09

I am having a hard time understanding why the Oracle CBO is behaving the way it does when a bind variable is part of a OR condition.

My environment

Oracle 12.2 over Red Hat Linux 7

HINT. I am just providing a simplification of the query where the problem is located

...

ANSWER

Answered 2021-Jun-10 at 17:36

From the execution plan the optimiser is, for some reason, re-evaluating the hierarchical query for every row in your table, and then using exists() to see if that row's ID is in the result. It isn't clear why the or is causing that. It might be something to raise with Oracle.

From experimenting I can see three ways to at least partially work around the problem - though I'm sure there are others. The first is to move the CSV expansion to a CTE and then force that to materialize with a hint:

Source https://stackoverflow.com/questions/67924603

QUESTION

skip deleting records when a child record is found

Asked 2021-Jun-11 at 07:43

i have a pl/sql procedure to modify/delete records based on a checkbox selection in my Apex application:

...

ANSWER

Answered 2021-Jun-11 at 07:43

There is no need to delete all the records and re-inserting only the checked ones. That is a brute force approach and it works but it does not capture the real user action. As an alternative you can just delete/insert the changes. To do that, create an additional page item P124_S_OBJECTIF_OLD and set it to the value P124_S_OBJECTIF with a computation after header (or any pre-rendering processing point after P124_S_OBJECTIF has been initialized). In your pl/sql code use APEX_STRING.SPLIT to process the checkbox values and the MULTISET operator to decide which values have been touched.

Then your pl/sql process code could look like this.

Source https://stackoverflow.com/questions/67922541

QUESTION

How to generate the first day of the week, the last day of the week and week number between two dates in Oracle

Asked 2021-Jun-10 at 23:40

I would like to insert in table :

the first day of the week starting from Monday.
the last day of the week as Sunday.
the WEEK number => (1-52 or 1-53) based on the ISO standard.

First i tried to select first day, the last day and week number for specific date and it's works :

...

ANSWER

Answered 2021-Jun-07 at 20:36

Looks like you're looking for a calendar.

Based on your RANGES CTE, there's another - calendar which utilizes hierarchical query to create all dates between start_date and end_date. Once you have all dates, extract values you're interested in.

Source https://stackoverflow.com/questions/67878103

QUESTION

SQL3 error inconsistent data types while executing a method

Asked 2021-Jun-04 at 00:33

I have this DB for movie management in cinemas: FILM (ID_FILM, TITLE, DIRECTOR_NAME, PRODUCTION-BUDGET, RELEASE-DATE) SCREENING(ID_SCREEN, ID_FILM*, SCREEN_DATE, ROOM, City) SEEN (ID_SEEN, SPECTATOR_NAME, ID_SCREEN*, TICKET-PRICE).

I need to complete the Film type with the MySpectators method returning the whole (without duplicates) of its spectators. This is what I wrote for the signature and the body of this method :

...

ANSWER

Answered 2021-Jun-04 at 00:33

You haven't showed your DBACINEMA.TSET_REF_SEEN, so I can only guess that is a collection and you need to use one more table():

Source https://stackoverflow.com/questions/67829308

QUESTION

How can I implement a select list in apex oracle's interactive grid using only sql and what's available in oracle APEX?

Asked 2021-Jun-03 at 13:40

ID Material Material_Num User Assign User 1 stick 1111 Billy Bob "select list of users" 2 stone 1112 Jane Doe "select list of users" 3 rock 1113 John Deer "select list of users" 4 slab 1114 "select list of users" 5 brick 1115 "select list of users"

There will be a save button which will update the user column with the value in the assign user column. If the select list can be consolidated under the user column and keep the updated values that would be even better.

These are the steps I have taken so far:

Added an interactive grid to the page.
Created a query to populate the interactive grid.

...

ANSWER

Answered 2021-Jun-03 at 13:40

The 2nd query you posted should be

Source https://stackoverflow.com/questions/67806113

QUESTION

How can I return a SELECT query with an oracle function?

Asked 2021-Jun-03 at 11:41

I need to create a function that allows me to return the same result as a SELECT query and that contains pl/sql code.

I tried something really simple :

...

ANSWER

Answered 2021-Jun-03 at 03:39

the function has to be pipelined. For example :

Source https://stackoverflow.com/questions/67776791

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install dual

You can download it from GitHub.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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