determine line numbers and starting position from a single markdown string

parse-markdown-for-position.js

src = '# Magic Deck\n\n## A markdown editor for creating magical slide shows\n\n---\n\n# How to Use\n\nJust use `---` for each slide and markdown syntax to make it look pretty.\n\nWhen you\'re ready, just use `⌘+R` to render.\n\n---\n\n# Your Turn\n\n';


var index = src.match(new RegExp('---\n\n', "gi")).length;

console.log('Found: ' + index);

var pos = src.indexOf('---\n\n', 75);

console.log('Pos: ' + pos);

var tempString = src.substring(0, pos);
var lineNumber = tempString.split('\n').length;
console.log(lineNumber);