is there a community group for general questions?

[pwin]

Hi. I've a general question and wonder if there's a forum for these questions?

My question is, I am trying to create a dataset from a turtle string "value" in an editor pane using the following

`
function createStream (s) {
const resumer = require('resumer');
var stream = resumer();
stream.queue(s);
return stream;
}
function ingestTurtle(value){
const ttl_read = require('@graphy/content.ttl.read');
const dataset = require('@graphy/memory.dataset.fast');

let y_input_a = dataset();
createStream(value)
.pipe(ttl_read())
.pipe(y_input_a);

}`

Is this a correct interpretation of the code? If so, how can I iterate through the subjects and how in can I then find the predicates and objects for each subject?

[blake-regalia]

Thanks for asking, there is now the graphy-js/community chat room on gitter. I should add a badge to the README.

As for your question, you don't need to use createStream, graphy will do this for you. Just pass the string directly to the ttl_read function and pipe it onto the dataset. Then you can iterate the dataset or use Dataset#match method to fetch predicates and objects belonging to a certain subject, etc.

const ttl_read = require('@graphy/content.ttl.read');
const dataset = require('@graphy/memory.dataset.fast');

let y_dataset_a = dataset();
ttl_read(value)
  .pipe(y_dataset_a)
  .on('finish', () => {
    // dataset is now ready in memory, you can iterate using [Symbol.iterator]
    for(let g_quad of y_dataset_a) {
      console.log(g_quad.toString());
    }

    // or match
    for(let g_quad of y_dataset_a.match(factory.namedNode('http://eg.org/subject/A'))) {
       // ...
    }
  });