jojo 0.1.1

JOJO's Bizarre Programming Adventure.
Documentation 
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#!/usr/bin/env node
"use strict";

const fs = require ("fs");
const path = require ("path");

function tangle (input_file_name, output_file_name) {
    let line_array =
        fs.readFileSync (input_file_name)
        .toString ()
        .split ("\n");
    let cursor = 0;
    let result_array = [];
    while (cursor < line_array.length) {
        let line = line_array[cursor];
        cursor = 1 + cursor;
        if (line.match (/#\+property: tangle .*/)) {
        }
        else if (line.match (/#\+begin_src.*/)) {
            while (cursor < line_array.length) {
                let line = line_array [cursor];
                cursor = 1 + cursor;
                if (line.match (/#\+end_src.*/)) {
                    break;
                }  else {
                    result_array.push (line);
                }
            };
        }
        else {
            // do nothing
        }
    }
    fs.writeFileSync (
        output_file_name,
        line_array_to_string (result_array));
}

function line_array_to_string  (line_array) {
    let result_string = "";
    for (let line of line_array) {
        result_string = result_string.concat (line, "\n");
    }
    return result_string;
}

tangle ("core.org", "core.rs");
tangle ("token.org", "token.rs");