specifications

Ever since its introduction in ECMA-262, 3rd Edition , the Array.prototype.push method's return value is a Number : 15.4.4.7 Array.prototype.push ( [ item1 [ , item2 [ , … ] ] ] ) The arguments are appended to the end of the array, in the order in which they appear. The new length of the array is returned as the result of the call. What were the design decisions behind returning the array's new length, as opposed to returning something potentially more useful, like: A reference to the newly appended item/s The mutated array itself Why was it done like this, and is there a historical record of

Is there an official SQL standard? I.e. I want to understand what type of expression is supported by SQL language and how this expression evaluated by server? What documents are using for implementation SQL based databases? There is an official SQL standard from the ISO/ANSI committee. Some information can be found here: http://en.wikipedia.org/wiki/Sql However the specification itself is not freely available. You might find some drafts of older specs in the internet if you search for it. A nice explanation of the (yet a bit old) ANSI 99 standard is here: https://mariadb.com/kb/en/sql-99

Background I recently discovered the Python with keyword and started seeing its potential usefulness for more prettily handling some scenarios where I'd previously have used try: ... finally: ... constructs. I immediately decided to try it out on the MySQLdb connection object in some code I was writing. I didn't bother reading up on how __enter__ and __exit__ behave in implementors of the Python database API, and naively expected the behaviour to be like that of file objects - all I was expecting was for exit to call connection.close() . Imagine my confusion, then, at this behaviour: >>> with

I am having a weird RPM issue, I am new to it so bear with me... I have the spec file created and when I run to do the build I get an error: /var/tmp/rpm-tmp.ajKra4: line 36: cd: hero-01: No such file or directory error: Bad exit status from /var/tmp/rpm-tmp.ajKra4 (%prep) Then I check that temp file and it is trying to CD to a directory that does not exist.. Should it be creating this in the spec file? if so where? Here is my spec file: Summary: Install Hero Name: hero Version: 01 Release: 1 Group: Billing reporting Source: %{name}-%{version}.tar.gz License: SLA %description Hero billing

In UML specification superstructure 2.5(still Beta, page 203) A Class may be designated by setting isActive to true as active (i.e., each of its instances is an active object). When isActive is false the Class is passive (i.e., each of its instances executes within the context of some other object). I wonder if there is a simple example illustrates the differences in applying each one of them? And elaborate this concept a bit? By definition, Active Objects In UML, active classes, and therefore active objects , exist in their own thread of operations and have their own address space. If

A number of sources (e.g. What is the meaning of erb? and three out of the top four results from this google search ) cite http://ruby-doc.org/stdlib-1.8.7/libdoc/erb/rdoc/ERB.html as the official documentation on the ERB format, but that really just gives you the API rather than the file format. I found a nice little summary in http://docs.puppetlabs.com/guides/templating.html#erb-template-syntax , but there's got to be something more official, right? And who is the "defining authority"? Did this come out of Rails? Since some folks like to know motivation behind questions, I'm looking for

This question came about because code that worked previously in .NET 4.0 failed with an unhandled exception in .NET 4.5, partly because of try/finallys. If you want details, read more at Microsoft connect . I used it as the base for this example, so it might be helpful to reference. The code For the people who chose to not read about the details behind this question, here is a very quick look at the conditions where this happened: using(var ms = new MemoryStream(encryptedData)) using(var cryptoStream = new CryptoStream(encryptedData, decryptor, CryptoStreamMode.Read)) using(var sr = new