denotational-semantics

Edit In consideration of the answer response below regarding the reference ECMAScript Language Specification - 11.13.2 Compound Assignment Considering why these, javascript: o=""; o = o + (o+=1) ; alert(o); o=""; o = (o+=1) + o; alert(o); are NOT the same. There are temporal semantic issues with left to right script evaluation (ref: ECMA spec. - The addition operator ). One consequence is that the + operator is not necessarily commutative. This can also be seen by with: javascript: o=1; o = o + (o+=1) ; alert(o); o=1; o = (o+=1) + o; alert(o); or javascript: o=" _ "; o = o + (o+=1) ; alert(o);

Bottom in Haskell described here is said to be any computation that have errors, is unterminated, or involves infinite loop, is of any type... is this specific to Haskell? We know in Lattice theory, there is also a notion of Bottom there.....and shouldn't Bottom be defined based on what's the order defined? Indeed there is an order of definedness , where bottom is the least defined value. Have a look at this page about denotational semantics in Haskell for a more thorough explanation. Here is a lattice for the values of Maybe Bool taken from the wiki page. It shows that Just True is more

I swear there used to be a T-shirt for sale featuring the immortal words: What part of do you not understand? In my case, the answer would be... all of it! In particular, I often see notation like this in Haskell papers, but I have no clue what any of it means. I have no idea what branch of mathematics it's supposed to be. I recognise the letters of the Greek alphabet of course, and symbols such as "∉" (which usually means that something is not an element of a set). On the other hand, I've never seen "⊢" before ( Wikipedia claims it might mean "partition" ). I'm also unfamiliar with the use of