This is a snippet of IFC definition:
#20=IFCORGANIZATION('','Anon Consulting','',$,$);
What are the meaning of the $ characters? For now, my educated guess is that they represent `null. Where can I verify this?
BuildingSmart (owner of the IFC standard) says
The $ character encodes the indefinite value, i.e. it appears if an optional attribute has not been filled in.
So, yes, it is essentially a 'null' value.
Source: http://www.buildingsmart-tech.org/implementation/faq/faq-specific-ifc-spec#Q6
The '$' sign stands for a value that is infinite. For example within the entity, IfcTransitionCurveSegment2D, if it is an entering transition the radius is usually infinite. If you look at the STEP file it will have a '$' sign instead of an infinite sign or similar.
Further some properties within the ifc entities are optional, meaning you don't have to define them in order to create a valid ifc object. Whenever an object has an optional property, which is not defined by the user, the program aso, it will show as a '$' sign too within the STEP.
All this is documented in the ISO 10303 -21 if you wanna look into this any further.
I hope I could help.
Related
According the CSS Level 3 specification, for parsing the start of an identifier, you:
Check if three code points would start an identifier
Look at the first code point:
If the first character is -, then we have a valid identifier if:
The second code point is an identifier-start code point ([a-zA-Z_] or non-ASCII).
The second code point is -.
The second and third character form a valid escape.
Otherwise, we do not have a valid identifier start. After determining if we have a valid identifier start, the only requirements to have a valid <ident-token> is we have 0 or more of any combination of the following:
Escape tokens
ASCII letters
Digits
_ or -
Non-ASCII characters
Since we do not require any characters following an identifier start token, this would suggest that -- is a valid identifier, even if never supported by any browser or framework. However, even official CSS validation services (maintained by those that design the CSS specifications) do not consider this a valid identifier. Is this merely a bug in the validation service?
Yes it's valid and it works. It's the shortest custom property (aka CSS variable) that you can define:
body {
--:red;
background:var(--);
}
Related: Can a css variable name start with a number?
The -- custom property identifier is reserved for future use, but current browsers incorrectly treat it as a valid custom property.
See also
w3c/csswg-drafts#6313
I try to use this in Robot framework
#{Title} = Win get handle("[ACTIVE]")
But It seem doesn't work.I need some Example for this command.
Please Help
Sorry for my poor Grammar
**ERROR**
Cannot set variable '#{Title}': Expected list-like value, got string.
When running keywords, you don't use parentheses after the keyword to submit parameters. Instead use:
${Title}= Win Get Handle [ACTIVE]
The [ACTIVE] parameter is automatically submitted as a string.
Also, notice that I changed #{Title} into ${Title}. That is because # denotes a list variable that expects a list return from the keyword. Apparently the Win get handle returns a String variable, which shall be assigned to a scalar $-denoted variable.
Lastly, I'm not sure if you're using Win Get Handle correctly. To my understanding the implementation for that keyword would return a handle to a window (a unique identifier to run further actions against it) rather than its title.
Can someone explain to me what the difference is between these two Cloud Functions declarations!?
exports.boxScoresUpdate = functions.database.ref('/Games/{gid}/BoxScores').onWrite(event => {
and
exports.emailEmployeeReport = functions.database.ref('/Employee/${eid}/reports').onWrite(event => {
Other then they reference different Nodes... the first function just has {gid} while the second function has ${eid}
What is the $ used for!? and does it actually matter (can you use them interchangeably) since my function works without the $ as seen in the first database reference using only {gid}
The first line is the correct expression for a wildcard variable in a database path.
The second line doesn't seem to be correct at all. If it was using string variable interpolation with backticks (which it is not), it would include the current value of eid in the string, assuming it has been defined globally ahead of time. Right now it is literally including the $ in the string path, which is most likely not what was intended.
If you got that line from this video, notice in the comments that we acknowledged that is was a mistake in the typing and should not have included the dollar sign.
I am storing XBRL JSON using elasticsearch.
This xBRL-JSON OIM spec describes the oim:period property:
Otherwise, an ISO 8601 time interval representing the {interval}
property, expressed in one of the following forms:
<start>/<end>
<start>/<duration>
<duration>/<end>
Where <start> and <end> are valid according to the xsd:dateTime datatype, and <duration> is valid according to xsd:duration.
Examples from arelle's plugin look like this:
2016-01-01T00:00:00/PT0S
2015-01-01T00:00:00/P1Y
I notice that arelle's plugin exclusively produces this format:
<start>/<duration>
My question
Is there a way to save at least the <start> part as a date type in elasticsearch?
Ideas I had:
elastichsearch only (my preference)
Use a custom date format which anticipates the /<duration> part, but ignores it
I haven't checked Joda yet; will it ignore characters in the date format if they aren't part of the special character? Like the "/" delimiter or the "P" which precedes any duration value (like PT0S and P1Y above)?
EDIT So the single-quote character escapes literals; this works yyyy'/P' will accept a value '2015/P'. However, the rest of the duration could be more dynamic
Re: dynamic; will Joda accept regex or wildcard character like "\d" or "+" qualifier so I can ignore all the possible variations following the P?
Use a character filter to strip out the /<duration> part before saving only <start>as datetime. But I don't know if character filters happen before saving as type: date. If they don't, the '/`part isn't stripped, and I wouldn't be passing valid date strings.
Don't use date type: Use a pattern tokenizer to split on /, and at least the two parts will be saved as separate tokens. Can't use date math, though.
Use a transformation; although it seems like this is deprecated. I read about using copy_to instead, but that seems to combine terms, and I want to break this term apart
Some sort of plugin? Maybe a plugin which will fully support this "interval" datatype described by the OIM spec... maybe a plugin which will store its separate parts...?
change my application (I prefer to use elasticsearch-only techniques if possible)
I could edit this plugin or produce my own plugin which uses exclusively <start> and <end> parts, and saves both into separate fields;
But this breaks the OIM spec, which says they should be combined in a single field
Moreover it can be awkward to express an "instant" fact (with no duration; the PT0S examples above); I guess I just use the same value for end property as start property... Not more awkward than a 0-length duration (PT0S) I guess.
Not a direct answer, but it's worth noting that the latest internal drafts of the xBRL-JSON specification have moved away from the the single-field representation. Although the "/" separated notation is an ISO standard, tool support for it appears to be extremely poor, and so the working group has chosen to switch to separate fields for start and end dates. I would expect Arelle support to follow suit in due course.
I have a TextBox, and I want to force the user to type an email format in this field like (example#mail.com) ?
I don't want to use FilteredTextBoxExtender or the RegularExpressionValidator.
I want to do it manualy.
Use the MailAddress class of System.Net.Mail. If what you pass into it is not a valid email address it will fail.
Example:
How do I validate email address formatting with the .NET Framework?
You are really going to reinvent the wheel.
But if it is your wish, you have to use string manipulation functions built in to the String object.
First do a check whether there is a in # symbol in the text.
Use String.Contains to check that.
Or you can use String.IndexOf to check whether the # symbol is present, and if present which index is it present. (considering the string as an array of characters)
And then check whether there are any (and how many) characters present before the # symbol.
If the symbol # symbol was in the 4th index, then you know there are 3 characters before etc.
There's plethora of functions for the String object. You may have to use Length function and String.SubString to retrieve parts of the string.
Get the indexes of the # symbol and the . symbol and check whether there are at least 3 characters in between.
I really cant seem to think of all the possibilities but first list down all the possibilities and check them one by one.
You can also use the Contains method to check whether illegal characters are present :)
EDIT: String.LastIndexOf will return the last index where a specified character was found ;)
And you count and check whether the # symbol was found more than once etc
String.IndexOfAny(Char[])
String.IndexOfAny Method (Char[], Int32)
String.IndexOfAny Method (Char[], Int32, Int32)
This is the best way I found on internet.
Regex.IsMatch(YourStringEmail, "^(?("")("".+?""#)|(([0-9a-zA-Z]((\.(?!\.))|[-!#\$%&'\*\+/=\?\^`\{\}\|~\w])*)(?<=[0-9a-zA-Z])#))" + _
"(?(\[)(\[(\d{1,3}\.){3}\d{1,3}\])|(([0-9a-zA-Z][-\w]*[0-9a-zA-Z]\.)+[a-zA-Z]{2,6}))$")
Thank you.