Can you describe how do you do this in detailed?
Like:
> but since I am using docker containers to run node, I always mount the
current directory as a volume in /app inside the container, so that works
out fine.
> I also think that this way forces me to separate the code in modular
blocks, which is already a good practice in itself.
How to do this? About this: > With sessions you have to make sure to
execute the blocks in the correct order to build the "state" that your
current block needs.
I think have to use `noweb` reference here.
(If you have a blog article describe this whole JS literate programming
setup, that will be useful.)
Finally, thanks you provide this paradigm.

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On Sat, Dec 23, 2017 at 2:32 AM, Martin Alsinet <martin@alsinet.com.ar>
wrote:

> Hello stardiviner,
>
> On Fri, Dec 22, 2017 at 6:57 AM stardiviner <numbchild@gmail.com> wrote:
>
>>
>> I wish to do JavaScript Literate Programming in Org-mode.
>>
>> So the :session header argument is very necessary.
>>
>>
> I do Literate Programming in Javascript with Org-mode, and I have found a
> workaround using a combination of tangled files and require.
>
> I separate the logic in source code blocks which then I tangle into js
> files and I require those js files in other source blocks.
>
> Example:
>
> #+BEGIN_SRC js :tangle src/parser.js
> const fs = require('fs');
> const parse = require('csv-parse')
>
> function columns(line){
>     return line.map(s => s.toLowerCase());
> }
> parse_csv = function(filename, fn, limit){
>     fs.readFile(filename, "utf8", function (err, fileData) {
>         var opts = {columns: columns, trim: true};
>         if (limit) {
>             opts.to = limit;
>         }
>         parse(fileData, opts, (err, rows) => fn(rows));
>     });
> }
> module.exports = parse_csv;
> #+END_SRC
>
> So, I tangle that source block into a js file, and then I can use it from
> other blocks, without needing sessions at all:
>
> #+BEGIN_SRC
> const parser = require("/app/src/parser.js");
> const inputFile = './data/records.csv';
> parse_csv(inputFile, console.log);
> #+END_SRC
>
> The only drawback is that you have to use absolute paths requiring the js
> files, but since I am using docker containers to run node, I always mount
> the current directory as a volume in /app inside the container, so that
> works out fine.
> I also think that this way forces me to separate the code in modular
> blocks, which is already a good practice in itself.
> With sessions you have to make sure to execute the blocks in the correct
> order to build the "state" that your current block needs.
> This way source blocks function as standalone units that can be run at any
> time, I just run *org-babel-tangle* and then hit *C-c *inside the js
> block.
>
> I hope that helps you.
>
>
> Martin
>