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OrderedCollection get all lines

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Valentin Ryckewaert

May 11, 2016; 1:41pm

OrderedCollection get all lines

54 posts

Hi,

I would like to reproduce the grep command in Pharo.

To do it I wanted to get the content of a stream and transform it to an OrderedCollection (to use matchesRegex: on it).

First of all, is there an easier way to do it?

In a second time, is there a method to get the content of a Stream as an OrderedCollection ? (nextLine exists so I could use it to get my OrderedCollection but is there an easier way?)

Sven Van Caekenberghe-2

May 11, 2016; 1:45pm

Re: OrderedCollection get all lines

5697 posts

Did you see #lines and #linesDo: ?

> On 11 May 2016, at 16:15, Valentin Ryckewaert <[hidden email]> wrote:
>
> Hi,
>
> I would like to reproduce the grep command in Pharo.
> To do it I wanted to get the content of a stream and transform it to an OrderedCollection (to use matchesRegex: on it).
>
> First of all, is there an easier way to do it?
> In a second time, is there a method to get the content of a Stream as an OrderedCollection ? (nextLine exists so I could use it to get my OrderedCollection but is there an easier way?)

Valentin Ryckewaert

May 11, 2016; 1:48pm

Re: OrderedCollection get all lines

54 posts

Thanks you again Sven, it will work with that, but there is nothing on Streams?

2016-05-11 16:19 GMT+02:00 Sven Van Caekenberghe <[hidden email]>:

Did you see #lines and #linesDo: ?

> On 11 May 2016, at 16:15, Valentin Ryckewaert <[hidden email]> wrote:
>
> Hi,
>
> I would like to reproduce the grep command in Pharo.
> To do it I wanted to get the content of a stream and transform it to an OrderedCollection (to use matchesRegex: on it).
>
> First of all, is there an easier way to do it?
> In a second time, is there a method to get the content of a Stream as an OrderedCollection ? (nextLine exists so I could use it to get my OrderedCollection but is there an easier way?)

Sven Van Caekenberghe-2

May 11, 2016; 1:53pm

Re: OrderedCollection get all lines

5697 posts

> On 11 May 2016, at 16:22, Valentin Ryckewaert <[hidden email]> wrote:
>
> Thanks you again Sven, it will work with that, but there is nothing on Streams?

If performance is not too important, just read the whole contents of the file.

BTW, this is actually example 19 of 'Elegant Pharo Code':

https://medium.com/concerning-pharo/elegant-pharo-code-bb590f0856d0

'^.*.jpg' asRegex in: [ :regex |
'/tmp/foo.txt' asFileReference contents lines
select: [ :line | regex matches: line ] ]

> 2016-05-11 16:19 GMT+02:00 Sven Van Caekenberghe <[hidden email]>:
> Did you see #lines and #linesDo: ?
>
> > On 11 May 2016, at 16:15, Valentin Ryckewaert <[hidden email]> wrote:
> >
> > Hi,
> >
> > I would like to reproduce the grep command in Pharo.
> > To do it I wanted to get the content of a stream and transform it to an OrderedCollection (to use matchesRegex: on it).
> >
> > First of all, is there an easier way to do it?
> > In a second time, is there a method to get the content of a Stream as an OrderedCollection ? (nextLine exists so I could use it to get my OrderedCollection but is there an easier way?)
>
>
>

... [show rest of quote]

Henrik Sperre Johansen

May 11, 2016; 2:38pm

Re: OrderedCollection get all lines

1774 posts

There's also PositionableStream >> #nextLine
which lets you write code like

[readStream atEnd] whileFalse:
[(self regexMatch: readStream nextLine)
ifNotNil: [:matchingLine | "Record match somewhere here"]]

Cheers,
Henry