gistfile1.txt

var $ = function (selector) {
  var elements = [];
	var classPosition = selector.split('').indexOf(".");
	var idPosition = selector.split('').indexOf("#");
	var selectorArray = selector.split("");


	if ( classPosition === -1 && idPosition === -1){
			var elementCollections = document.getElementsByTagName(selector);
	  	for (var i = 0; i < elementCollections.length; i++) {
	  				elements.push(elementCollections[i])
	  	}

	}else if (classPosition > -1 && idPosition === -1 ){
			classPosition === 0 ? elements.push(document.getElementsByClassName(selector)) : elements.push(document.getElementsByClassName(selector)[1]);
			console.log('juste une class');

	}else if ( idPosition > -1 && classPosition === -1){
			if (idPosition === 0) {
				selectorArray.shift();
				elements.push(document.getElementById(selectorArray.join("")))
			}else {

				var tagName = selectorArray.slice(0,idPosition).join("")
				debugger
				elements.push(document.getElementsByTagName(tagName));
			}
			console.log('juste une id');


	}else if (idPosition > -1 && classPosition > -1){
		console.log('class and ID');


	}