Comments (2)
from liquidhaskell-tutorial.
Thank you very much! That blog is a very invaluable resource that I can ever find for this tutorial. Right now I'm skimming those articles to augment my understanding of LH. I think Abstract and Bounded Refinement Types would made a very good tutorial for next chapters.
For now I think I've found in that blog the solution for most of the problems I ask in prior question just like problem about inline
, about aforementioned termination metrics, etc. I also found a solution that works for matFromList
for me but I am not able to figure out how to use this template
matFromList :: [[a]] -> Maybe (Matrix a)
matFromList [] = Nothing
matFromList xss@(xs:_)
| ok = Just (M r c vs)
| otherwise = Nothing
where
r = size xss
c = size xs
ok = undefined
vs = undefined
and instead just remake the function from zero resulting in this
{-@ matFromList :: x:[[a]]
-> Maybe (MatrixN a {size x} {sizeFirstIdx x}) @-}
matFromList :: [[a]] -> Maybe (Matrix a)
matFromList [] = Nothing
matFromList [[]] = Nothing
matFromList [xs] = Just (M 1 (size xs) (vecFromList [vecFromList xs]))
matFromList (xs:xss) = case matFromList xss of
Just (M row col elts)
| col == size xs -> Just (M (row+1) col (vecFromList xs `vCons` elts))
| otherwise -> Nothing
Nothing -> Nothing
which I think is more elegant for me, but I still like to know the intended solution using that template.
Unfortunately I am still stumped in the lemma problem, hence the 3 problems in Chapter 8 (range
), Chapter 10 (fresh
) and Chapter 12 (insertAPI
& deleteAPI
. member
is solved because it's just modification of mem
from Chapter 10) is still unsolved for me. Would you like to give me another hint or clue for these? I'd really like to be able to figure out the answer after all this time.
Once again thank you @ranjitjhala ! May your work prosper and this software be better and better.
from liquidhaskell-tutorial.
Related Issues (20)
- Regarding reverse in Ch 8: Sets HOT 2
- How to workaround using Stack for building html HOT 7
- apparent typo in tutorial under "Testing Values: Booleans and Propositions"
- Can't even get started because of build issues HOT 5
- there is an extra ")" at the end of this line
- Numbering the exercises HOT 1
- Question about Chapter 5.3: delmin HOT 2
- Links to subsections don't work for me HOT 2
- Syntax of refinement types HOT 4
- Chapter 8 exercise "reverse" HOT 8
- Instructions for running LiquidHaskell HOT 2
- Figures 1.4 and 1.5 in Chapter 12
- Chapter 12 Exercise InsertRight HOT 4
- Current HEAD of main fails to build HOT 4
- Liquid Type Mismatch on Initial Build HOT 2
- Passing -fdefer-type-errors to GHC causes confusing errors from LH HOT 3
- Text description of "null" in Chapter 6 is reversed HOT 1
- Link is no longer available HOT 1
- Trouble with Chapter 11 HOT 3
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.
from liquidhaskell-tutorial.