Add #each and #if built-in helpers for more readable iteration and conditionals

lib/handlebars/compiler.js

@@ -77,6 +77,28 @@ Handlebars.registerHelper('blockHelperMissing', function(context, fn, inverse) {
 }, function(context, fn) {
   return fn(context)
 });
+
+Handlebars.registerHelper('each', function(context, fn, inverse) {
+  var ret = "";
+
+  if(context.length > 0) {
+    for(var i=0, j=context.length; i<j; i++) {
+      ret = ret + fn(context[i]);
+    }
+  } else {
+    ret = inverse(this);
+  }
+  return ret;
+});
+
+Handlebars.registerHelper('if', function(context, fn, inverse) {
+  if(context === false || context == null) {
+    return inverse(this);
+  } else {
+    return fn(this);
+  }
+});
+
 // END(BROWSER)
 
 exports.Handlebars = Handlebars;