btw i'll be converting the design to css soon. i haven't seen any comments on meta. about it. but judging from the feedback here it seems most people are OK with it. (except for some font rendering issues)
if you don't scout banshees, you don't need stealth detection
this is a mistake most people make
You think to yourself: well he can go banshees so I need stealth detection, and he can go tanks so I need medivacs, and he can go BC so I need vikings...
I know I shouldn't try to built around everything, but it's just like leaving your base open against zerg as terran, your just waiting for them to kill your SCVs if you're not really fast on units
heh. I've been banging my head against a relational algebra problem for close to 5 hours. I am now convinced that I've made my life harder than necessary
Consider the tables Frequents(drinker, bar), Likes(drinker, beer), Sells(bar, beer), with obvious meanings. We say that a bar b is redundant if there exists a bar b1 such that (i) b1 sells all the beers that b sells, and (ii) All the drinkers that frequent b and like some beer that b sells, also frequent b1. Write a relational algebra query to find all redundant bars. Do not use the aggregate operator or joins.
Relational algebra, an offshoot of first-order logic (and of algebra of sets), deals with a set of finitary relations (see also relation (database)) which is closed under certain operators. These operators operate on one or more relations to yield a relation. Relational algebra is a part of computer science.
Introduction
Relational algebras received little attention until the publication of E.F. Codd's relational model of data in 1970. Codd proposed such an algebra as a basis for database query languages. (See "Implementations" below.)
Relational algebra is essentially equivalent in e...
I have to do this problem and then 5 more like it tomorrow, fit in class, birthday party, and prepare for my first class on wednesday. I'm scared poopless about teaching in front of 30 undergrads when I haven't even seen the syllabus for the class. Though on Wednesday, I get my Droid 2 at approximately 530 pm, which makes me happy.
well today (yesterday now) is (was) my birthday and tomorrow (today) is my friends b'day. We have two parties (I'm 4 beers down tonight and I was still pretty productive)