Oh by the way...
I've also released a companion addon called 'format/zulu-lite' .
This is just like 'format/zulu', except it omits the sandbox, with its
sample data and app. It's for people who want to use the
converter-verbs in their own code. Which you'd do by:
require 'format/zulu-lite'
That won't mean much to you unless you've run the lab which comes with
the "sandbox".
You'll remember a recent thread where I asked about loading (or
requiring) an addon in a choice of different modes (which caused a lot
of head-scratching)? Well, this is the way I've chosen to do it.
Ian
On Mon, Sep 17, 2012 at 2:36 AM, Ian Clark <earthspo...@gmail.com> wrote:
> @Emir
> A big Thank-you for your set of sample tasks from a bona-fide J
> beginner. They come at the right time for me.
>
> I have just released a new addon: "format/zulu". This offers a
> "sandbox" for experimenting with strings in J. It also installs a new
> "Lab". See (in j602):
> Menu: Studio > Labs... > Category: format > Strings conversion package
> ...which puts the sandbox through its paces.
> (Sorry, I can't see the Lab in J701. Maybe it's because I can't see
> any "format" category. So you may have to install and run j602 instead
> of j701.)
>
> Near the end of the Lab, viz at:
> ── (31 of 39) TASKS
> there's a set of sample tasks with boxed strings. They're much like
> yours. Plus my own solutions. (But, I have to admit, my solutions are
> not as slick as Raul's.)
>
> Nevertheless "zulu" might be of help to you. I offer it to you (and
> other beginners) in that vein. Your feedback will help me to improve
> the Lab.
>
> @Raul
> Thank you for your solutions to Emir's tasks. Most timely.
> As a result I'm going to use some of them in zulu.ijt, if you don't mind.
> And if you get time to cast your eye over "format/zulu" I'd welcome
> your suggestions.
> (Other J-ers, too, especially those teaching J to beginners.)
>
> NB. "format/zulu" is very much aimed at beginners, especially its Lab.
> I expect a Jmaster will die of boredom working thru it.
>
> On Sun, Sep 16, 2012 at 9:01 PM, Raul Miller <rauldmil...@gmail.com> wrote:
>> s =: ' ';'this';'is';'a';'sentence'
>> (<'is') 0} s
>> ┌──┬────┬──┬─┬────────┐
>> │is│this│is│a│sentence│
>> └──┴────┴──┴─┴────────┘
>> 4 ({.,(<'sample'),}.) s
>> ┌─┬────┬──┬─┬──────┬────────┐
>> │ │this│is│a│sample│sentence│
>> └─┴────┴──┴─┴──────┴────────┘
>> 1 }. s
>> ┌────┬──┬─┬────────┐
>> │this│is│a│sentence│
>> └────┴──┴─┴────────┘
>> (2 {. s), 3 }.s
>> ┌─┬────┬─┬────────┐
>> │ │this│a│sentence│
>> └─┴────┴─┴────────┘
>> (<'the') (I. s = <,'a')} s
>> ┌─┬────┬──┬─┬────────┐
>> │ │this│is│a│sentence│
>> └─┴────┴──┴─┴────────┘
>> (<'the') (I. s = <'a')} s
>> ┌─┬────┬──┬───┬────────┐
>> │ │this│is│the│sentence│
>> └─┴────┴──┴───┴────────┘
>> s -. <'is'
>> ┌─┬────┬─┬────────┐
>> │ │this│a│sentence│
>> └─┴────┴─┴────────┘
>>
>> In other words:
>>
>> 1) yes
>> 2) yes
>> 3) yes, but be careful
>>
>> In this case, your s contained five boxes. Four of those boxes where
>> character sequences. One of them was just a character. In the
>> general case, you need to be aware of the distinction between a
>> character (rank 0) and a sequence of characters (rank 1), and you
>> especially need to be aware of the distinction between a character and
>> a sequence of characters of length 1. They're different but seem to
>> be the same.
>>
>> This is analogous to the distinction between
>> 2
>> and
>> 3 4 5
>>
>> The first is just a number, the second is a sequence of numbers...
>> And you can have sequences of numbers of length 1, but that's not
>> quite the same thing as the number by itself.
>>
>> --
>> Raul
>>
>> On Sun, Sep 16, 2012 at 3:30 PM, Emir Ustamujic <emir_...@yahoo.com> wrote:
>>> Hello,
>>>
>>> As I'm often working with boxes of strings I have identified several things
>>> that I would like to do with boxed strings but haven't figured how to do
>>> yet as I'm still learning J.
>>>
>>> [I hope the boxes in the examples don't turn out garbled...]
>>>
>>>
>>> 1. If there is a list of boxed words(strings) how to replace individual
>>> items with another string ?
>>>
>>> For example I have :
>>> ] s =: ' ';'this';'is';'a';'sentence'
>>> ┌─┬────┬──┬─┬────────┐
>>> │ │ this│ is│a│ sentence│
>>> └─┴────┴──┴─┴────────┘
>>> but would like to use something like: 0 boxitemreplace s; 'is' (to replace
>>> the first element which can be a space with 'is)
>>> and get this result :
>>> ┌──┬────┬──┬─┬────────┐
>>> │is │this │is │a │sentence │
>>> └──┴────┴──┴─┴────────┘
>>> or something like 2 boxitemreplace s;' ' (to replace the third element with
>>> a space)
>>> ┌──┬────┬──┬─┬────────┐
>>> │ │this │ │a │sentence │
>>> └──┴────┴──┴─┴────────┘
>>>
>>> 2. Insert and Remove
>>>
>>> For example using the same s =: ' ';'this';'is';'a';'sentence':
>>> would it be possible to somehow insert a word at a specific index so: 4
>>> inserttobox s;'sample'
>>> would yield
>>> ┌─┬────┬──┬─┬──────┬────────┐
>>> │ │this │is │a │sample │sentence │
>>> └─┴────┴──┴─┴──────┴────────┘
>>> or remove nth item such as 0 removeitemfrombox s;' '
>>> ┌────┬──┬─┬──────┬────────┐
>>> │this │is │a │sample │sentence │
>>> └────┴──┴─┴──────┴────────┘
>>>
>>>
>>> 3. And consequently would it be also possible to replace all occurences of
>>> one string value within s with another string and remove all occurences of
>>> one string from a boxed list such as s ?
>>>
>>> I more or less know how to do this with regular strings such as s=: 'this
>>> is a sentence' but my problem is when dealing directly with boxed strings
>>> and when they contain spaces.
>>>
>>>
>>> Thanks &Regards,
>>> Emir
>>> ----------------------------------------------------------------------
>>> For information about J forums see http://www.jsoftware.com/forums.htm
>> ----------------------------------------------------------------------
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