[erlang-questions] Printed list to Erlang function

Lloyd R. Prentice <>
Wed Mar 30 04:05:03 CEST 2016


Wow! What a cool idea.

Thanks, Richard.

Best wishes,

LRP

Sent from my iPad

> On Mar 29, 2016, at 8:47 PM, "Richard A. O'Keefe" <> wrote:
> 
> 
>> On 30/03/16 5:59 am,  wrote:
>> So, I have a printed list of stop words:
>> 
>> http://www.ranks.nl/stopwords
>> 
>> I'd like to turn this list into an Erlang function that I can query---
>> 
>> stopwords() ->
>>    ["word1", "word2" ... "wordN"].
>> 
>> is_stopword(Word) ->
>>    List = stopwords(),
>>    lists_member(Word, List).
> Even if there is some arcane reason why you want the collection of words
> as a list, I strongly suggest generating
> 
> is_stopword("a") -> true;
> is_stopword("about") -> true;
> ...
> is_stopword("yourselves") -> true;
> is_stopword(_) -> false.
> 
> Open the list of stopwords in vi.
> :1,$s/^.*$/is_stopword("&") -> true;/
> :$a
> is_stopword(_) -> false.
> <ESC>
> 
> The Erlang compiler will turn this into a trie, roughly speaking.
> This will be *dizzyingly* faster than the code you outlined.
> 
> 
> 
> 
>> 
>> All my efforts so far have evolved into ugly kludges. Seems to me there must be an elegant method that I'm overlooking.
>> 
>> Some kind soul point the way?
>> 
>> Many thanks,
>> 
>> LRP
>> 
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