Alternative script for YAML? - yaml

I was going to use yaml because it has great feature called merge! ("<<" key)
And I'm using 'yaml-cpp' for parser since i'm working on cpp.
But! yaml-cpp does not support merge. What can I do for alternatives?
Other scripts, other parser, other way to parse or whatever is good if I can use merge feature.
BUT I don't need to merge more than one object. I just need define something and create another object inheritd from the first one and override some values. That it.
Thanks for reading.

If you're unable to wait and need merges, you can follow the suggestion by "barma" on the yaml-cpp issue: http://code.google.com/p/yaml-cpp/issues/detail?id=41#c12
The change is to insert the lines below into FindValueForKey template (between for-loop and return 0):
const Node *pValueMerge = FindValueForKey(std::string("<<"));
if(pValueMerge) {
return pValueMerge->FindValueForKey(key);
}
The problem (as I mentioned on the issue page) is that the spec allows
<<: [*dict1, *dict2]
to merge multiple dictionaries; but it appears you don't need that.

Ask 'yaml-cpp' to implement the feature.

Problem
Using YAML merge keys.
Solution
Other scripts, other parser, other way to parse or whatever is good if I can use merge feature.
The following YAML implementations support the desired feature as of this writing
Ruby 2.x
Python 2.x // 3.x

Related

Multiple formatter functions in Bokeh datatable

Is it possible to do multiple format types within one "formatter"? For example:
TableColumn(field="y", title="y",formatter=HTMLTemplateFormatter(), NumberFormatter(),DateFormatter())
etc
No it's not possible. Bokeh currently only accepts a single CellFormatter per TableColumn. You could try opening an issue on Bokeh's Github to allow thge formatter argument to accept a list of CellFormatters. Or, you may look into hooking up either a JS or python callback to the TableColumn to do some more sophisticated formatting.
Two and a half years later, but...... This is currently being developed now. Keep an eye on the Bokeh repo for addition of this function, hopefully in the near future.

conditional include in asciidoc

I am using Spring RestDoc together with AsciiDoc to describe my rest api. RestDoc generates different files depending if there are request parameters described / response fields etc. I would like to have one template conditionally including whatever file exists.
something like this:
Request:
include::{reqresPath}/http-request.adoc[]
Response:
include::{reqresPath}/http-response.adoc[]
Parameters:
ifeval::[{{reqresPath}/request-parameters.adoc}.exists]
include::{reqresPath}/request-parameters.adoc[]
endif::[]
ifeval::[{{reqresPath}/request-parameters.adoc}.exists]
include::{reqresPath}/request-parameters.adoc[]
endif::[]
or at least exclude warnings in case of a missing file. But I could not figure out how to suppress these.
As of today, where is no operator for ifeval available, which can be used to check the existence of a file.
The way I would go is to write an extension for Asciidoctor, which can also be done by using Java. If your projects is big enough, I would suggest to go for this solution.
The most extreme way is to make a custom TemplatedSnippet which is generating an empty snippet to be included...
I hope there is a better way to do this.
Edit:
Take a look of http://asciidoctor.org/docs/user-manual/#by-tagged-regions

BASH BSON parser

We need to do some queries of a Mongo DB from BASH shell scripts. Using eval and Mongo's printjson() gives me text output, but it needs to be parsed. Using other scripting languages (Python, Ruby, Erlang, etc) is not an option.
I looked at JSON.sh ( a BASH script lib JSON parser: https://github.com/rcrowley/json.sh ) and it appears to be close to a solution other than the issue that it does not recognize BSON-but-not-JSON data types. Before I try to mod it to recognize BSON data types, is anyone aware of an existing solution?
Thanks.
10/11 Below Stennie notes that I have received an answer in the MongoDB User group, and provides a URL. The answer is very nice and complete, and begins, "MongoDB actually uses what we call Mongo Extended JSON which differs a bit from the vanilla JSON standard..." so I will have to modify the parser. Thanks to all.
Do you perhaps want to use tojson() rather than printjson() and loop through the result of tojson() to parse the fields?

howto get Builder to create <tag></tag> instead of <tag/>

I,m using Builder::XmlMarkup to create xml. I want to create a tag without content because the api force me to create this.
If I use a blog
xml.tag do
end
I get what i need
<tag></tag>
but I want it shorter
xml.mytag
this gives me
<mytag/>
but i want
<mytag></mytag>
what do I have to pass as option.
regards Kai
Just pass empty string as a parameter. xml.mytag('')
Why do you want <mytag></mytag> instead of <mytag/>? Since the output is XML, downstream applications should not know or care about the difference.
According to the Infoset spec (Appendix D point 7), "The difference between the two forms of an empty element: <foo/> and <foo></foo>" is not represented in the XML Information Set.
This doesn't answer your "how" question, but if you discover that you actually don't need to do what you're trying to do, it may save you from a difficult and unnecessary wild goose chase.
ok empty string is nice, another one-line-way is empty block I found out.
xml.mytag{}

Eliminating code duplication in a single file

Sadly, a project that I have been working on lately has a large amount of copy-and-paste code, even within single files. Are there any tools or techniques that can detect duplication or near-duplication within a single file? I have Beyond Compare 3 and it works well for comparing separate files, but I am at a loss for comparing single files.
Thanks in advance.
Edit:
Thanks for all the great tools! I'll definitely check them out.
This project is an ASP.NET/C# project, but I work with a variety of languages including Java; I'm interested in what tools are best (for any language) to remove duplication.
Check out Atomiq. It finds code that is duplicate that is prime for extracting to one location.
http://www.getatomiq.com/
If you're using Eclipse, you can use the copy paste detector (CPD) https://olex.openlogic.com/packages/cpd.
You don't say what language you are using, which is going to affect what tools you can use.
For Python there is CloneDigger. It also supports Java but I have not tried that. It can find code duplication both with a single file and between files, and gives you the result as a diff-like report in HTML.
See SD CloneDR, a tool for detecting copy-paste-edit code within and across multiple files. It detects exact copyies, copies that have been reformatted, and near-miss copies with different identifiers, literals, and even different seqeunces of statements.
The CloneDR handles many languages, including Java (1.4,1.5,1.6) and C# especially up to C#4.0. You can see sample clone detection reports at the website, also including one for C#.
Resharper does this automagically - it suggests when it thinks code should be extracted into a method, and will do the extraction for you
Check out PMD , once you have configured it (which is tad simple) you can run its copy paste detector to find duplicate code.
One with some Office skills can do following sequence in 1 minute:
use ordinary formatter to unify the code style, preferably without line wrapping
feed the code text into Microsoft Excel as a single column
search and replace all dual spaces with single one and do other replacements
sort column
At this point the keywords for duplicates will be already well detected. But to go further
add comparator formula to 2nd column and counter to 3rd
copy and paste values again, sort and see the most repetitive lines
There is an analysis tool, called Simian, which I haven't yet tried. Supposedly it can be run on any kind of text and point out duplicated items. It can be used via a command line interface.
Another option similar to those above, but with a different tool chain: https://www.npmjs.com/package/jscpd

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