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! Copyright (C) 2013 John Benediktsson
! See for BSD license
USING: assocs fry io io.streams.string kernel math
math.combinatorics regexp sequences sets splitting strings
unicode wikipedia wrap.strings ;
IN: text-summary
: split-words ( sentence -- words )
[ blank? ] split-when harvest ;
: split-sentences ( content -- sentences )
split-words " " join
R/ (?<=[.!?]|[.!?][\'"])\s+/ re-split ;
: split-paragraphs ( content -- paragraphs )
"\n\n" split-subseq [ split-sentences ] map ;
: sentence-score ( sentence1 sentence2 -- n )
[ split-words ] bi@
2dup [ length ] bi@ + [ 2drop 0 ] [
[ intersect length ] [ 2 / ] bi* /
] if-zero ;
: sentence-ranks ( paragraphs -- ranks )
concat 2 all-combinations H{ } clone [
dup '[
[ sentence-score ] 2keep
[ nip _ at+ ]
[ drop _ at+ ] 3bi
] assoc-each
] keep ;
: best-sentence ( paragraph ranks -- sentence )
over length 2 < [ 2drop "" ] [
'[ _ at 0 or ] supremum-by
] if ;
: summary ( content -- summary )
split-paragraphs dup sentence-ranks
'[ _ best-sentence ] map harvest ;
: summary. ( content -- )
summary [ "" like 72 wrap-string print nl ] each ;
: article-summary. ( name -- )
[ article. ] with-string-writer
R/ \[\d+\]/ "" re-replace summary. ;
CONSTANT: example-content """
Lior Degani, the Co-Founder and head of Marketing of Swayy,
pinged me last week when I was in California to tell me about
his startup and give me beta access. I heard his pitch and was
skeptical. I was also tired, cranky and missing my kids – so my
frame of mind wasn’t the most positive.
I went into Swayy to check it out, and when it asked for access
to my Twitter and permission to tweet from my account, all I
could think was, “If this thing spams my Twitter account I am
going to bitch-slap him all over the Internet.” Fortunately that
thought stayed in my head, and not out of my mouth.
One week later, I’m totally addicted to Swayy and glad I said
nothing about the spam (it doesn’t send out spam tweets but I
liked the line too much to not use it for this article). I
pinged Lior on Facebook with a request for a beta access code
for TNW readers. I also asked how soon can I write about it.
It’s that good. Seriously. I use every content curation
service online. It really is That Good.
What is Swayy? It’s like Percolate and LinkedIn recommended
articles, mixed with trending keywords for the topics you find
interesting, combined with an analytics dashboard that shows the
trends of what you do and how people react to it. I like it for
the simplicity and accuracy of the content curation. Everything
I’m actually interested in reading is in one place – I don’t
have to skip from another major tech blog over to Harvard
Business Review then hop over to another major tech or business
blog. It’s all in there. And it has saved me So Much Time
After I decided that I trusted the service, I added my Facebook
and LinkedIn accounts. The content just got That Much Better. I
can share from the service itself, but I generally prefer
reading the actual post first – so I end up sharing it from the
main link, using Swayy more as a service for discovery.
I’m also finding myself checking out trending keywords more
often (more often than never, which is how often I do it on
The analytics side isn’t as interesting for me right now, but
that could be due to the fact that I’ve barely been online since
I came back from the US last weekend. The graphs also haven’t
given me any particularly special insights as I can’t see which
post got the actual feedback on the graph side (however there
are numbers on the Timeline side.) This is a Beta though, and
new features are being added and improved daily. I’m sure this
is on the list. As they say, if you aren’t launching with
something you’re embarrassed by, you’ve waited too long to
It was the suggested content that impressed me the most. The
articles really are spot on – which is why I pinged Lior again
to ask a few questions:
How do you choose the articles listed on the site? Is there an
algorithm involved? And is there any IP?
Yes, we’re in the process of filing a patent for it. But
basically the system works with a Natural Language Processing
Engine. Actually, there are several parts for the content
matching, but besides analyzing what topics the articles are
talking about, we have machine learning algorithms that match
you to the relevant suggested stuff. For example, if you shared
an article about Zuck that got a good reaction from your
followers, we might offer you another one about Kevin Systrom
(just a simple example).
Who came up with the idea for Swayy, and why? And what’s your
business model?
Our business model is a subscription model for extra social
accounts (extra Facebook / Twitter, etc) and team collaboration.
The idea was born from our day-to-day need to be active on
social media, look for the best content to share with our
followers, grow them, and measure what content works best.
Who is on the team?
Ohad Frankfurt is the CEO, Shlomi Babluki is the CTO and Oz Katz
does Product and Engineering, and I [Lior Degani] do Marketing.
The four of us are the founders. Oz and I were in 8200 [an elite
Israeli army unit] together. Emily Engelson does Community
Management and Graphic Design.
If you use Percolate or read LinkedIn’s recommended posts I
think you’ll love Swayy.
➤ Want to try Swayy out without having to wait? Go to this
secret URL and enter the promotion code thenextweb . The first
300 people to use the code will get access.
Image credit: Thinkstock
: run-example ( -- )
example-content summary. ;