Oracle has had an excellent multi version control system in place since very long(at least since oracle 8.0) Following should help. User A starts a transaction and is updating 1000 rows with some value At Time T1 User B reads the same 1000 rows at time T2. User A updates row 543 with value Y … Read more
First, to get this out of the way: Cloud Computing is a marketing buzzword and ill-defined one (at least at the moment). I would recommend dissecting this overarching buzzword and in market segments, namely: IaaS: Infrastructure as a Service (e.g. Amazon EC2) Paas: Platform as a Service (e.g. Google AppEngine) DaaS: Database as a Service … Read more
The C++ standard just calls it “arrow” (§5.2.5).
From my research (personal & unpaid), looking at the common way these terms are used in programming literature & “in the wild”, I have found that these definitions seem to fit their usages. Execution refers to the process of running code. Exact method does not matter, can be compiled or not, done by a computer … Read more
From the manual: PostGIS has begun a transition from the existing naming convention to an SQL-MM-centric convention. As a result, most of the functions that you know and love have been renamed using the standard spatial type (ST) prefix. Previous functions are still available, though are not listed in this document where updated functions are … Read more
“Indices” is the mathematical formulation whereas in publishing they use “indexes” (which is probably why so many people in IT consider “indices” to be more correct than “indexes”). I think that a table index is analogous to an index in a book rather than an exponent in maths, so the publishing variant is the appropriate … Read more
an “!important” declaration (the delimiter token “!” and keyword “important” follow the declaration) takes precedence over a normal declaration. http://www.w3.org/TR/CSS2/cascade.html#important-rules Basically, where two style rules are the same… it gives the one marked !important greater importance and will apply those styles. Example div{ opacity:0 !important; } div.jason{ opacity:1; } The first rule would be applied … Read more
That depends on where you use it… The name of the encoding is UTF-8. A dash is not valid to use everywhere, so for example in .NET framework the property of the System.Text.Encoding class that returns an instance of the UTF8Encoding class that handles the UTF-8 encoding is named UTF8.
You are correct. We can further split your item 1 by separating “local” and “remote” branch labels: local branches (local labels) are names that start (internally—many front-end command hide this) with refs/heads/, while “remote branches”—which are also called “remote-tracking branches”—start with refs/remotes/ and then have one more path component naming the specific remote before the … Read more
It’s the query, or sometimes the query string. To pinch a useful diagram from the URI RFC: foo://example.com:8042/over/there?name=ferret#nose \_/ \______________/\_________/ \_________/ \__/ | | | | | scheme authority path query fragment