gar1t.com - Latest Comments

Re: Sharding /dev/null

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Re: Sharding /dev/null

birgersp — Wed, 15 Mar 2017 03:54:14 -0000

This is pure gold! Is the script available somewhere? Would love to quote some of this!

Re: Erlang Web Development with modlib

Garrett Smith — Mon, 06 Jul 2015 09:58:19 -0000

Eh, unfortunately no - not that I'm aware of. Psycho is still the closest thing we have for that but it's under developed. I'm hoping to spend some cycles on this in a few months to move things along, including an adapter to Cowboy.

Re: Erlang Web Development with modlib

Craig Russell — Fri, 03 Jul 2015 09:14:04 -0000

"the Erlang community needs a drop-dead simple interface that can be used to chain HTTP handlers together"

It's been 3 years, has this happened?

I'm new to Erlang, trying to explore the landscape.

Re: Sharding /dev/null

Rezaul Haque — Fri, 17 Apr 2015 05:31:08 -0000

it,s a furious movie free download http://www.rezaaul.com

Re: Solving Embarrassingly Obvious Problems In Erlang

tooky — Wed, 25 Mar 2015 03:36:53 -0000

Nice article. The refactoring reminds me of 2 of the patterns from Kent Beck's smalltalk best practice patterns:

• intention revealing names
• composed method - or in this case function

As someone who has spent much more time working in object languages it's interesting to see which of the patterns and ideas I'm comfortable with translate to functional languages.

Re: Sharding /dev/null

Hernan Soulages — Thu, 19 Mar 2015 13:45:50 -0000

Here is a video of the talk: https://www.youtube.com/wat...
I assume this was a later version.

Re: Solving Embarrassingly Obvious Problems In Erlang

Konstantin — Thu, 19 Mar 2015 05:51:21 -0000

Hi.

The original code have this lines:

Name = get_required_attr("name", Msg),
verify_db_name(Name),

Which refactored to:

db_name(Msg) ->
verify_db_name(get_required_attr("name", Msg)).

But they results are different. "Name" variable is not changed by verify_db_name() in original code.

Re: Sharding /dev/null

Sean Kelly — Sun, 21 Sep 2014 13:21:09 -0000

This is so utterly brilliant! Gar1t, thank you! I'm now seriously curious about Erlang for the first time. (But first, I'll re-watch it!)

Re: Sharding /dev/null

Natt — Thu, 21 Aug 2014 16:24:22 -0000

I do exactly the same. Probably we are doomed.

Re: Codemotion Rome 2014 - Software As Biology

Mathias Verraes — Tue, 10 Jun 2014 04:47:00 -0000

Awesome talk!

Someone told me that at Facebook, they had different teams competing on writing better VM's and compilers for php, and killed of the losers. If that's true, it would make a nice example of variation and selection in software.

In case anyone else is looking for the video: http://vimeo.com/82194443

Re: Sharding /dev/null

Scala W — Sat, 17 May 2014 16:52:03 -0000

Haven't tested this code but this is done in a slightly more dependency injection fashion. We could easily turn this code into a bunch of functional stuff using zips and maps but it may be a little more difficult to read. Knowing yield is useful as well. So:

import sys
import MySQLdb
def get_table_row_counts(query):
  for table_name in list_tables(query):
    yield (table_name, count_table_rows(query, table_name))


def count_table_rows(query, table_name):
  return query("select count(*) from %s" % table)[0][0]


def list_tables(query):
  return [row[0] for row in query("show tables")]

def get_database_querier(database):
  def query(sql):
    cur = database.cursor()
    cur.execute(sql)
    for r in cur:
      yield r
    cur.close()
  return query

if __name__ == "__main__":
  database = MySQLdb.connect(db = sys.argv[1])
  querier = get_database_querier(database = database)
  for table, count in get_table_row_counts(query = querier):
    print "%s %i" % (table, count)

Note how much more control you have of the inputs in the 'main' method. How flat this functionality is. How we can have a single cursor if we wanted (I'm opening separate cursors here) and close it down thereafter. Functional. Passing. etc.

Re: Erlang Factory 2014 - Erlang + CZMQ

Garrett Smith — Thu, 17 Apr 2014 03:21:34 -0000

Hah - so that's the link :) Thanks!

Re: Erlang Factory 2014 - Erlang + CZMQ

Federico Carrone — Tue, 15 Apr 2014 18:25:05 -0000

You can add the video if you want :D!http://vimeo.com/90838366

Re: Solving Embarrassingly Obvious Problems In Erlang

Martin — Mon, 03 Mar 2014 15:38:02 -0000

I understand you want to stress the fact that you can create the program without assignments, however when I think out loud I get to 5 steps:
I first log the pending operation
Then I collect input from the message
Then I validate the collected input
Then I create the database
Then I handle the result
for me this results in the following function:
handle_db_create_msg(Msg, State) ->
log_operation(db_create, Msg),
Args = create_db_args(Msg),
validate_db_args(Args),
Result = create_db(Args),
handle_db_create_result(Result, Msg, State).
Because I like to read left-right, top-down I think this more readable than the nested functions in the original. On the other hand a bit of reformatting and indention may already help a lot.

Re: Solving Embarrassingly Obvious Problems In Erlang

Bob Wilkinson — Mon, 10 Feb 2014 04:44:51 -0000

handle_db_create_result is used within handle_db_create_msg but is never defined. I *guess* that it should be handle_create_db_result?

Re: Sharding /dev/null

oddjobsman — Thu, 19 Dec 2013 04:32:01 -0000

Goodone!

Re: Sharding /dev/null

kunthar — Sun, 27 Oct 2013 15:48:44 -0000

Thor bless you brother! http://www.youtube.com/watc...

Re: Sharding /dev/null

Garrett Smith — Wed, 18 Sep 2013 14:30:54 -0000

Well, I confess - I watch it to get to the closing credits. #swoon

Re: Sharding /dev/null

Carlo DiCelico — Wed, 18 Sep 2013 14:13:06 -0000

Is it weird that I watch this once every couple of days?

Re: Sharding /dev/null

Garrett Smith — Mon, 02 Sep 2013 14:50:30 -0000

Sorry for the embarrassingly late reply -- and thank you for inquiring -- but alas, no, this was not recorded.

Re: Sharding /dev/null

ZoIomon — Wed, 29 May 2013 06:53:00 -0000

Now I want to learn Outlaw Techno Psychobitch!

Re: Sharding /dev/null

Garrett Smith — Tue, 16 Apr 2013 11:52:54 -0000

These are from Landslide. Alas I have the same problem viewing them on my Android phone :( I'd love some recommendations on a slideshow generator that creates universally readable HTML! The idea of using Landslide in the first place was that it made accessing these slides easy for people.

#fail

Re: Sharding /dev/null

Le Viet Bach — Tue, 16 Apr 2013 07:52:21 -0000

Which library did you used to create these slides? Btw, please consider adding on screen buttons if possible. The slides can't be read from a tablet

Re: Sharding /dev/null

Paul Barry — Fri, 05 Apr 2013 04:23:16 -0000

Having watched the "new" video, I think I'm going to need some serious therapy... or a stiff drink.