Seven Languages In Seven Weeks: Haskell - Day 3

Posted January 28, 2011 at 9:11 AM by Ben Nadel

Tags: Haskell

I just finished day 3 of Haskell from Seven Langauges in Seven Weeks and well, the term "finished" is being extremely generous. I am more than a little bit embarrassed but I didn't do any of the homework problems from last night. I've been struggling to make peace with Haskell and then last night, I just hit a complete mental block.

I spent 30 minutes trying to figure out how to create a HashTable; and then once I created it, I spent another 30 minutes trying to figure how to store a value in the HashTable. This latter task, I was not able to do. I kept getting told that I couldn't map some value onto some value. I had not idea what was going wrong. Even when I copied a line from an online example, it failed.

The next problem in the homework then built on top of the previous HashTable. At that point, I was simply disheartened. Plus, this section dealt with Monads and I didn't really understand any of it. In my frustration, I Tweeted this:


 
 
 

 
I know I'm a Haskell novice, but the concept of a Monad seems to make easy things easy after the language itself has made them hard?  
 
 
 

All in all, I just closed the book last night feeling dazed and confused. It's really a shame that this had to be the last day of homework; I would have much preferred to end on a higher note.

Epic #Fail.




Reader Comments

Jan 28, 2011 at 10:15 AM // reply »
6 Comments

Hey, it's not a total failure. At least you tried it out and gave it your best shot. Better than not trying it at all :)


Jan 28, 2011 at 10:43 AM // reply »
11,238 Comments

@Joshua,

Thanks my man. I appreciate that. I really didn't want to give up; I just was completely stumped. I kept getting errors about not being able to map key value onto [Int] or something. I don't know. I have no idea what was going wrong.

At least it's Friday :D


Feb 2, 2011 at 6:31 PM // reply »
26 Comments

The #haskell IRC channel on freenode can be a great way to get answers to questions like that (it currently has over 700 Haskell programmers online!).


Feb 2, 2011 at 6:51 PM // reply »
11,238 Comments

@Sean,

IRC is one of those things like bit-torrents. I know of it, but have never really used it.


Feb 2, 2011 at 7:24 PM // reply »
26 Comments

@Ben,

IRC can be a very good resource for Q&A stuff. Hundreds of developers online (well, CFML usually has about 30), quick, interactive chatter to get a problem explained and solved.

#coldfusion is most active on dal.net but also present on freenode and efnet (I'm on dal.net and freenode).

Pretty much all the other languages have IRC channels on freenode (free, open source languages...). I tend to hang out in #scala and #clojure and several Clojure-related channels (#leiningen, #clojureql, #pallet, #jclouds). I sometimes join the #haskell channel (I used to be on it all the time).


Post A Comment

Comment Etiquette: Please do not post spam. Please keep the comments on-topic. Please do not post unrelated questions or large chunks of code. And, above all, please be nice to each other - we're trying to have a good conversation here.

Please review the following issues:

Author Name:


Author Email:

Author Website:

Comment:

Supported HTML tags for formatting: <strong>bold</strong>   <em>italic</em>   <code>code</code>







  • Help Wanted - Find Your Next ColdFusion Job
Ben Nadel's Company - Epicenter Consulting Recent Blog Comments
May 20, 2013 at 11:45 AM
Using jQuery's Animate() Step Callback Function To Create Custom Animations
This is really useful. I found out that you don't actually have to use a dummy css property (surprisingly). To animate a property in a linear-gradient for instance I did this this.css('someLinearGra ... read »
May 20, 2013 at 10:51 AM
Using A Dynamic Column Name With ValueList() In ColdFusion
@Josh, Oh snap! You're totally right! I'm not sure I've ever tried that. I did know that you can call a number of other array-methods on ColdFusion query columns: http://www.bennadel.com/blog/167 ... read »
May 20, 2013 at 10:45 AM
Using A Dynamic Column Name With ValueList() In ColdFusion
@Ben - I believe you can achieve the same functionality with ColdFusion's built in ArrayToList() function. ArrayToList( users[ "id" ] ); ... read »
May 20, 2013 at 10:21 AM
My Experience With AngularJS - The Super-heroic JavaScript MVW Framework
Is there any error logging and handling framework in angularjs, if not then in what way I can do this. ... read »
May 19, 2013 at 2:31 PM
My Experience With AngularJS - The Super-heroic JavaScript MVW Framework
It's funny really just how well that image describes the way I would imagine most people that go with angular for some project is. I have had a similar roller-coaster ride with it as well, but not qu ... read »
May 17, 2013 at 7:42 PM
HashKeyCopier - An AngularJS Utility Class For Merging Cached And Live Data
Ben - thanks so much for posting these Angular articles and findings, they've been a huge help towards learning one of the more 'complex' JavaScript frameworks out there (IMO). I have been using Angu ... read »
May 16, 2013 at 5:01 PM
UPDATE: Parsing CSV Data Files In ColdFusion With csvToArray()
Your code was the closest thing I've found to obtaining some direction for converting ISO fields to values that CF can translate properly. Thank you for posting! ... read »
May 15, 2013 at 6:07 PM
Making SOAP Web Service Requests With ColdFusion And CFHTTP
Ben, you once again saved my bacon at work. Thank you, thank you, thank you! ... read »
InVision App - Prototyping Made Beautiful With Prototyping Tools