first_found=. 13 : 'CR-.~ y{.~ y i.LF'
first_found
(13{a.) -.~ ] {.~ (10{a.) i.~ ]
(#;]) first_found 'abc'
┌─┬───┐
│3│abc│
└─┴───┘
(#;]) first_found 'abc',LF,'123'
┌─┬───┐
│3│abc│
└─┴───┘
(#;]) first_found 'abc',CRLF,'123'
┌─┬───┐
│3│abc│
└─┴───┘
(#;]) first_found 'abc',CRLF,'123',LF
┌─┬───┐
│3│abc│
└─┴───┘
(#;]) first_found 'abc',CRLF,'123',CRLF
┌─┬───┐
│3│abc│
└─┴───┘
2014-11-25 11:41 GMT-05:00 chris burke <[email protected]>:
> > When I feel like programming defensively, I'll ensure that the last
> character
> is LF (and remove any CRs) like this:
>
> This is done by freads, unlike fread which returns the raw data.
>
> On Tue, Nov 25, 2014 at 7:44 AM, Devon McCormick <[email protected]>
> wrote:
>
> > I usually split on the last character using "cut" like this:
> >
> > <;._2 fread 'some.file'
> >
> > When I feel like programming defensively, I'll ensure that the last
> > character is LF (and remove any CRs) like this:
> >
> > <;._2 LF (],[#~[~:[:{:]) CR-.~]0 : 0
> > Four-score and seven years ago,
> > our fathers brought forth upon this continent
> > a new nation,
> > conceived in liberty
> > and dedicated to the proposition
> > that all men are created equal.
> > )
> >
> >
> > On Tue, Nov 25, 2014 at 10:26 AM, 'Pascal Jasmin' via Programming <
> > [email protected]> wrote:
> >
> > > The spec (Fasta) can be revised to splitting on all LFs, where the
> first
> > > box is the control data, and subsequent boxes are the package.
> > >
> > > http://rosalind.info/glossary/fasta-format/
> > >
> > > If so, you can grab all of the records from the sample link with this
> > > expression (copy records on clipboard, uses j8 clipboard access)
> > >
> > > cutLF each '>' cut wdclippaste ''
> > >
> > > The reason for the LFs in the payload as I understand it is to separate
> > it
> > > into processing chunks. Having them boxed works for this, but if you
> > ever
> > > need to put the LFs back, or join them into a single string
> > >
> > > LF joinstring ;/ 'abc'
> > > a
> > > b
> > > c
> > >
> > > '' joinstring ;/ 'abc'
> > > ; ;/ 'abc' NB. or this
> > > abc
> > >
> > >
> > > to extend Joe's solution
> > >
> > > (>@:{. ; ;@}.)@:cutLF each '>' cut
> > >
> > >
> > >
> > >
> > > ----- Original Message -----
> > > From: Joe Bogner <[email protected]>
> > > To: [email protected]
> > > Cc:
> > > Sent: Tuesday, November 25, 2014 6:00 AM
> > > Subject: Re: [Jprogramming] Split on first found character
> > >
> > > I might do it this way:
> > >
> > > (>@:{. ; ;@}.)@(LF&cut) x
> > >
> > > ┌───────┬─────────────┐
> > >
> > > │case_id│GCTAGTCGACGTC│
> > >
> > > └───────┴─────────────┘
> > >
> > >
> > >
> > >
> > > On Tue, Nov 25, 2014 at 5:47 AM, Jan-Pieter Jacobs <
> > > [email protected]> wrote:
> > >
> > > > I think I would solve it like this (with intermediate steps):
> > > >
> > > > x=: 'case_id', LF, 'GCTAGTCG', LF, 'ACGTC', LF
> > > >
> > > > NB. Find the locations of LF's in the string
> > > > (LF = ]) x
> > > >
> > > > NB. assign 0 to everything before the LF, assign 1 to everything
> after
> > it
> > > > ([: +./\ LF = ]) x
> > > >
> > > > NB. The wonderful "key" adverb lets you apply verbs based on it's key
> > > > (another array), eg. box
> > > > (</.~ [: +./\ LF =]) x
> > > >
> > > > NB. Get rid of the LF's by replacing < by a version removing LF:
> > > > ((<@#~ LF~:])/.~ [: +./\ LF = ]) x
> > > >
> > > > This is what I came up with, but smarter people will probably suggest
> > > more
> > > > elegant ways.
> > > >
> > > > I hope this is useful.
> > > > Jan-Pieter
> > > >
> > > > 2014-11-25 11:00 GMT+01:00 Ryan <[email protected]>:
> > > >
> > > > > I have a character array with LF's, and want to split it on the
> > > > > first LF, and remove the remaining LF's. I'm wondering if there's
> a
> > > > > simpler
> > > > > way than what I'm doing now:
> > > > >
> > > > > x=: 'case_id', LF, 'GCTAGTCG', LF, 'ACGTC', LF
> > > > >
> > > > > filterLF=: #~ ~:&LF
> > > > > headLF=: {.~ i.&LF
> > > > > tailLF=: }.~ i.&LF
> > > > > (headLF ; filterLF@tailLF) x
> > > > > ┌────────┬─────────────┐
> > > > > │>case_id│GCTAGTCGACGTC│
> > > > > └────────┴─────────────┘
> > > > >
> > > > > (I'm reading text files in fasta format:
> > > http://rosalind.info/glossary/
> > > > > fasta-format/)
> > > > >
> > > > > Thanks for any suggestions,
> > > > > Ryan
> > > > >
> > > > >
> > > > >
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> > whom
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> >
> >
> >
> > --
> > Devon McCormick, CFA
> > ----------------------------------------------------------------------
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> >
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