js-yaml-concat-seqs

js-yaml-concat-seqs
===================


This js-yaml type is inspired by Ingy döt Net comment in the original Yaml Issue #48 discussing merging sequences. He suggested that a tag is a valid option to denote merging of sequences, or how he called it !concat-seqs. I took the type system from the original js-yaml library and extended it with a one-line extension for the concat-seqs function as proposed.

This is a lightweight library (literally 5 lines of code), without any external dependencies other than js-yaml. Requires Node 11 for Array.prototype.flat() to be available.

> js-yaml extra type:
>
> - !!concat-seqs [seq1, ..., seq2]

Installation
------------

``sh
npm install js-yaml-concat-seqs
`

Usage
-----

`js
import yaml from "js-yaml";
import type from "js-yaml-concat-seqs";

const schema = yaml.DEFAULT_SCHEMA.extend([ type ]);

const src =
- &seq1
- qux
- qox
- &seq2
- qix
- qax
- !!concat-seqs
- *seq1
- - foo
- bar
- *seq2
;

console.log(yaml.load(src, { schema }));
``