episode1-7.txt

Seventh episode! I'm building a programming language/environment from scratch while recording myself. Watch me struggle figuring out the bootstrapping! Some rambling on the nature of bootstrapping and what not to copy from javascript. Today, I play TMBG's John Henry (at zero volume to avoid copyright infringement...).

Bootstrapping is representative of most interesting programming.

Bootstrapping is bridging the gap between what is already implemented and what you want to use yourself.

var escapeForRegex = function (text) {
   var toEscape = ['-', '[', ']', '{', '}', '(', ')', '|', '+', '*', '?', '.', '/', '\\', '^', '$'];
   return text.replace (new RegExp ('[' + toEscape.join ('\\') + ']', 'g'), '\\$&');
}

var receive = function (message) {
   var parsedMessage = parse (message);

   if (parsedMessage.error) return alert (parsedMessage.error);

   var result;

   // {get: [...]}
   if (parsedMessage.get) result = get (parsedMessage.get);
   // {put: [...]}
   if (parsedMessage.put) result = put (parsedMessage.put);

   return result;
}

// It validates and it parses
var parse = function (message) {
   message = message.trim ().split (/\s/);

   if (message.length === 0) return {error: 'Message is empty'};

   if (message [0] [0] !== '@') return {error: 'Call must start with "@"'};

   if (message [0] !== '@') return {error: 'Call must start with "@" and have a space after it'};

   if (message [1] === 'get') return {get: message.slice (2)};

   if (message [1] === 'put') return {put: message.slice (2)};
}

var get = function (message) {
   var dataspace = localStorage.getItem ('cell');
   if (dataspace === null) dataspace = '';

   if (message.length === 0) return dataspace;

   message = message.join (' ');

   var output = [];

   var matchFound = false;

   dataspace.split ('\n').forEach (function (line) {
      if (line.match (new RegExp ('^' + escapeForRegex (output)))) {
         matchFound = true;
         return output.push (line.replace (message + ' ', ''));
      }
      if (matchFound) {
         var indent = Array (message.length + 1).fill ().map (function () {return ' '});
         if (line.match (new RegExp ('^' + indent))) return output.push (line.replace (indent, ''));
      }
      matchFound = false;
   });

   return output.join ('\n');
}

```
foo bar

{foo: 'bar'}
```

```
foo bar 1
    opa 2

{foo: {bar: 1, opa: 2}}
```

```
foo bar
    opa

{foo: {bar: '', opa: ''}}
```

```
foo bar 1
    opa

{foo: {bar: 1, opa: ''}}
```

var put = function (message) {
   // localStorage.setItem ('cell', updatedDataspace);
   if (message.length === 0)
}