units-of-measurement

SQL Server 2008 Geography .STBuffer() distance measurement units

由 心不动则不痛 提交于 2019-12-10 03:07:05
问题 I'm working with a geographic point using lat/long and need to find other points in our database within a 5 mile radius of that point. However, I can't seem to find out what the "units" are for STBuffer, it doesn't seem to conform to feet, miles, meters, kilometers, etc. The documentation only refers to them as "units", any suggestions? Thanks [...] from geography::STGeomFromText('POINT(x y)', 4326).STBuffer(z).STIntersects(geography::STGeomFromText('POINT(' + CAST(v.Longitude as varchar(max)

JSR 363 adding new units

由 ﹥＞﹥吖頭↗ 提交于 2019-12-08 18:18:56
问题 I am using the reference implementation of JSR 363: Units of Measurement API from maven (tec.units:unit-ri). Now I have to add a few units like teaspoon, fluid ounce and so on. Im extending the Units class to add a new unit like this: public static final Unit<Volume> TEASPOON = addUnit(new TransformedUnit<Volume>("tsp", CUBIC_METRE, new MultiplyConverter(0.000005))); This seems to work for converting but "tsp" is not parsing, so how do I add it to the parser? And Im having trouble adding

How to set the maximum width of a column in CSS Grid Layout?

由 前提是你 提交于 2019-12-08 14:29:54
问题 What I want to achieve: Using CSS Grid Layout, to have a page with a right column which size is derived from its content, but only up to 20% of the window width. How I thought it would work: div { border-style: solid; } #container { width: 300px; height: 300px; display: grid; grid-template-columns: 1fr minmax(auto, 20%); } <div id="container"> <div> some content </div> <div> Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec cursus eu leo ac ultrices. Vivamus ornare, orci sed

Getting the Battery temperature and unit of the result

由 对着背影说爱祢 提交于 2019-12-08 03:31:14
问题 I was reading how to get the temperature of the battery and I make small app, and in my receiver I have something like this int temp = intent.getIntExtra("temperature", 0); well , this temp have values like 390 or 380 something that is really big to be Celsius but I think that is big number even for Fahrenheit... can someone please tall what is the unit, does it have a range and so on. in the official documentation all I found was "integer containing the current battery temperature" Thanks

Is it possible to add a (dynamic) unit to a unitless number in sass?

由 这一生的挚爱 提交于 2019-12-07 18:12:15
问题 First of all, I am aware that to turn a unitless value into one with a unit I can multiply a unitless value by a single unit: $value: 25 * 1px; // 25px However I would like to know if there is any way to do this when the unit is dynamic. $unit: rem; $value: 23; .Box { // Try interpolation $united-value: #{$value}#{$unit}; value: $united-value; // Appears to be correct // Check it is actually a number using unitless check: unitless($united-value); // $number: "23rem" is not a number for

Pattern Matching of Units of Measure in F#

由 余生长醉 提交于 2019-12-07 04:49:49
问题 This function: let convert (v: float<_>) = match v with | :? float<m> -> v / 0.1<m> | :? float<m/s> -> v / 0.2<m/s> | _ -> failwith "unknown" produces an error The type 'float<'u>' does not have any proper subtypes and cannot be used as the source of a type test or runtime coercion. Is there any way how to pattern match units of measure? 回答1: As @kvb explains in detail, the problem is that units of measure are a part of the type. This means that float<m> is different type than float<m/s> (and

Unit-safe square roots

由 可紊 提交于 2019-12-06 21:44:47
问题 I just wondered how it is possible to write a user-defined square root function (sqrt) in a way that it interacts properly with F#'s unit system. What it should be like: let sqrt (x : float<'u ^ 2>) = let x' = x / 1.0<'u ^ 2> // Delete unit (x ** 0.5) * 1.0<'u> // Reassign unit But this is disallowed due to nonzero constants not being allowed to have generic units . Is there a way to write this function? With the builtin sqrt it works fine, so what magic does it perform? 回答1: Allowing nonzero

WPF Units and Code-Behind

由 ￣綄美尐妖づ 提交于 2019-12-05 12:32:09
问题 Recently I discovered WPF supports different measurement units in XAML. Besides default DIPs, there is also support for pixels, inches and centimeters (as far as I know). This allows designer to write XAML such as this: <Canvas> <Line X1="0cm" X2="3cm" Y1="1cm" Y2="3cm" Stroke="Black"/> </Canvas> However, you cannot bind these values. Imagine we have a ViewModel with Dimension property which is a String, for example "7cm". Following won't work: <Button Width="{Binding Dimension}">Test</Button

Pattern Matching of Units of Measure in F#

由 半世苍凉 提交于 2019-12-05 09:42:05
This function: let convert (v: float<_>) = match v with | :? float<m> -> v / 0.1<m> | :? float<m/s> -> v / 0.2<m/s> | _ -> failwith "unknown" produces an error The type 'float<'u>' does not have any proper subtypes and cannot be used as the source of a type test or runtime coercion. Is there any way how to pattern match units of measure? As @kvb explains in detail, the problem is that units of measure are a part of the type. This means that float<m> is different type than float<m/s> (and unfortunately, this information isn't stored as part of the value at runtime). So, you're actually trying

Unit-safe square roots

由 大兔子大兔子 提交于 2019-12-05 02:27:18
I just wondered how it is possible to write a user-defined square root function (sqrt) in a way that it interacts properly with F#'s unit system . What it should be like: let sqrt (x : float<'u ^ 2>) = let x' = x / 1.0<'u ^ 2> // Delete unit (x ** 0.5) * 1.0<'u> // Reassign unit But this is disallowed due to nonzero constants not being allowed to have generic units . Is there a way to write this function? With the builtin sqrt it works fine, so what magic does it perform? Allowing nonzero generic constants would make it very easy to break the safety of the type system for units (see Andrew
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