rangetype | An Ada-inspired Range type for Rust
kandi X-RAY | rangetype Summary
kandi X-RAY | rangetype Summary
An Ada-inspired Range type for Rust.
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QUESTION
Just to preface, I'm not asking what the difference is between a NULL boundary and an infinite boundary - that's covered in this other question. Rather, I'm asking why PostgreSQL makes a distinction between NULL and infinite boundaries when (as far as I can tell) they function exactly the same.
I started using PostgreSQL's range types recently, and I'm a bit confused by what NULL values in range types are supposed to mean. The documentation says:
The lower bound of a range can be omitted, meaning that all values less than the upper bound are included in the range, e.g.,
(,3]. Likewise, if the upper bound of the range is omitted, then all values greater than the lower bound are included in the range. If both lower and upper bounds are omitted, all values of the element type are considered to be in the range.
This suggests to me that omitted boundaries in a range (which are the equivalent NULL boundaries specified in a range type's constructor) should be considered infinite. However, PostgreSQL makes a distinction between NULL boundaries and infinite boundaries. The documentation continues:
You can think of these missing values [in a range] as +/-infinity, but they are special range type values and are considered to be beyond any range element type's +/-infinity values.
This is puzzling. "beyond infinity" doesn't make sense, as the entire point of infinite values is that nothing can be greater than +infinity or less than -infinity. That doesn't break "element in range"-type checks, but it does introduce an interesting case for primary keys that I think most people wouldn't expect. Or at least, I didn't expect it.
Suppose we create a basic table whose sole field is a daterange, which is also the PK:
...ANSWER
Answered 2021-May-20 at 00:04Rather, I'm asking why PostgreSQL makes a distinction between NULL and infinite boundaries when (as far as I can tell) they function exactly the same.
But they do not. NULL is a syntax convenience when used as bound of a range, while -infinity / infinity are actual values in the domain of the range. Abstract values meaning lesser / greater that any other value, but values nonetheless (which can be included or excluded).
Also, NULL works for any range type, while most data types don't have special values like -infinity / infinity. Take integer and int4range for example.
For a better understanding, consider the thread in pgsql-general that a_horse provided:
This makes sense because NULL values can't have a type of date, so they can't even be compared to the range
Every data type can be NULL, even domains that are explicitly NOT NULL. See:
That includes date, of course (like Adrian commented):
QUESTION
I run the sample for NET Core: [https://github.com/mattwcole/gelf-extensions-logging/blob/dev/samples/Gelf.Extensions.Logging.Samples.NetCore2/Program.cs][1]
Then I have ran Docker https://docs.graylog.org/en/4.0/pages/installation/docker.html?highlight=docker
Then I little bit corrected appsettings.json file:
...ANSWER
Answered 2021-Apr-22 at 11:50Need to check the Docker GrayLog Configuration: especially GELF Input local and global.
QUESTION
Postgres supports range types(permalink) such as int4range or tstzrange. The documentation for tstzrange is "Range of timestamp with time zone".
The default precision for timestamps is to use 6 digits for second fractions (microsecond resolution), however my application uses 3 digits for its timestamps (millisecond) through timestamp (3) with time zone. For consistency I would like to also use millisecond-resolution for my time periods.
What is the default tstzrange resolution? How can I configure it?
I tried to define my table using tstzrange(3) but this form is not supported. Applied to the example from the documentation, it would look like:
ANSWER
Answered 2021-Mar-02 at 10:46As of Postgres 13, the time resolution for tstzrange uses 6 digit for second fractions (microsecond resolution). This resolution cannot be changed.
To create a range between timestamps with a custom resolution, you have to define a new range type. Here is the query to create a timestamp range with a millisecond resolution:
QUESTION
I'm fairly new to VBA and have a problem. In this site, I found the code and it works fine, it prints last slide as pdf.
...ANSWER
Answered 2020-Dec-16 at 11:46Updated solution. In order to make printing specific slides more comfortable, I decided to put them into one variable (slidesToPrint). All slides not put into this variable are hidden just before printing (so they are not printed). After printing the hide order is restored to the original. So, slides which must be printed, bust be listed in this line:
slidesToPrint = Array(2, lngLast)
Full code:
QUESTION
Please see the following code. I have a dropdown with 3 values, the DatePicker should conditionally get disabled when the user chooses 1, or 2 from the dropdown. But this is not happening.
...ANSWER
Answered 2020-Dec-11 at 16:15Print a console log on the onChange, but from what I'm reading I suppose that the problem is the type: you're comparing string and numbers.
QUESTION
I know that I can use jsdoc to declare that a function returns an Object.
...ANSWER
Answered 2020-Nov-11 at 19:13Just define your object interface as:
QUESTION
I read this related question and customized the values of the traffic lights.
The IconMultiStateFormatting has following thresholds per default:
- If the cell value is greater than or equal 66% of all the values in the range, then green.
- If the cell value is lower but greater than or equal 33% of all the values in the range, then yellow.
- If the cell value is lower than 33% of all the values in the range, then red.
What I need is to swap red and green lights (red to large amounts and green to lower values) Is that possible?
Currently, this is my code:
...ANSWER
Answered 2020-Jul-31 at 18:25How would you set this in Excel? The only way I see is using a reversed icon order. IconMultiStateFormatting provides this too.
Complete example:
QUESTION
I have this JQuery Code how can i make it to work when form load, currently it only work on radio button click
I have this radio button
...ANSWER
Answered 2020-Jun-11 at 05:41You are just making div show/hide inside onClick handler so it will only get trigger on Click, instead you also need to call same logic on page load
I separated the show/hide logic in a function so you can call it anytime
I have wrote some dummy code down here try this. I have also used else instead of another if or you can use another if also
QUESTION
I am able to add one range but was unable to add multiple ranges and determine it in a variable:
...ANSWER
Answered 2020-Mar-13 at 16:29ActivePresentation.PrintOptions.Ranges.Add adds one range and it returns a PrintRange object. It can't hold multiple ranges because it represents a single range. If you have multiple ranges, then you have multiple PrintRange objects thus you can access them and use PrintRanges collection.
PrintRanges object (PowerPoint)A collection of all the PrintRange objects in the specified presentation. Each PrintRange object represents a range of consecutive slides or pages to be printed.
Example Use the Ranges property to return the PrintRanges collection.
So, when you add multiple ranges:
QUESTION
I have a tstzrange column. Rails is translating it into a Range of Time objects which loses the time zone information. I would like a Range of ActiveSupport::TimeWithZone objects. How can I do that?
Alternatively, how can I check if tstzrange spans exactly a day in the current time zone, and what day?
ANSWER
Answered 2020-Mar-03 at 01:52From the ActiveRecord::Timestamp docs...
You can also add database specific timezone aware types. For example, for PostgreSQL:
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