Re: [Bug-apl] working with )HOST

[Louis de Forcrand]

I am not very good with files and such, but from what I understand:

      ⎕←T←⊃¯1↓⍎')HOST date'

Sun Mar  6 01:11:48 CET 2016

      ⍴T

2 28

So you can save the result of )HOST in a variable if you use

⍎. To feed it a var, I would try something like:

      ]BOXING 2

      ⎕←FILE←⍎')HOST cat test.txt'

 hello, world  This file was written in my $HOME directory.  0  

      ⍴FILE

5

      FILE

.→-----------. .⊖. .→-------------------------------------------. .⊖. .→-.

|hello, world| | | |This file was written in my $HOME directory.| | | |0 |

'------------' '-' '--------------------------------------------' '-' '--'

Several things to note here. First of all, linefeeds / carriage returns / whatever

you want to call them in the file I read seemed to mark nested array ends, and

it seems that those LFs were lost. I don’t know how GNU APL handles LF chars,

so I would recommend you either keep the array boxed or disclose it like I did

in the first example (∊ enlisting it simply catenated all the lines together, as

the LFs were represented by ⊂⍬, boxed empty vectors).

Second, if you’re reading this Jürgen, note that even though ]BOXING was set

to 2, the result of ⎕←FILE is not boxed.

IMHO this is potentially the cleanest way to read a file. I have no idea how to tie

files and stuff like that.

Best of luck,

Louis

On 05 Mar 2016, at 03:54, address@hidden wrote:

Hi Bug-apl,

Currently, at a point in my code I do something like this:

⍝assume the variable 'yadda' exists and is correctly formed, as well as the read_file function

success←yadda ⎕fio[7] tie← 'wr'⎕FIO[3] "yadda.file"

)host ./shellscript.sh yadda.file yadda.file.new

yadda_new← read_file "yadda.file.new"

⍝end of code

My question is: is there either 1. a way to feed )host a variable (I don't think that is possible) or 2. a better way to implement this task in its entirety. I find it a small nuisance that I have to write and then read a file in my code to access non-APL stuff for processing.

-Alex