Added object params for ".by" method.

README.md

@@ -148,6 +148,18 @@ var acc = [];
 
 range1.by('days', function(moment) {
   // Do something with `moment`
+  acc.push(moment)
+});
+```
+
+You can also use moment.js’ object notation to specify custom intervals:
+
+``` javascript
+var custom_interval = {minutes: 30}; // every half hour
+
+range1.by(custom_interval, function(moment) {
+  // Do something with `moment`
+  acc.push(moment);
 });
 ```
 

dist/moment-range.js

@@ -202,6 +202,8 @@ DateRange.prototype.subtract = function(other) {
  * @param {(!DateRange|String)} range Date range to be used for iteration or
  *                                    shorthand string (shorthands:
  *                                    http://momentjs.com/docs/#/manipulating/add/)
+ *                              Can also use Object Literals for different intervals.
+ *                              Eg, {minutes: 30}
  * @param {!DateRange~by} hollaback Callback
  * @param {!boolean} exclusive Indicate that the end of the range should not
  *                             be included in the iter.
@@ -212,9 +214,12 @@ DateRange.prototype.by = function(range, hollaback, exclusive) {
   if (typeof range === 'string') {
     _byString.call(this, range, hollaback, exclusive);
   }
-  else {
+  else if ((range instanceof DateRange) || (typeof range === 'number')) {
     _byRange.call(this, range, hollaback, exclusive);
   }
+  else if (typeof range === 'object') {
+    _byObject.call(this, range, hollaback, exclusive);
+  }
   return this;
 };
 
@@ -239,6 +244,18 @@ function _byString(interval, hollaback, exclusive) {
   }
 }
 
+/**
+ * @private
+ */
+function _byObject(interval, hollaback, exclusive) {
+  var current = moment(this.start);
+
+  while (this.contains(current, exclusive)) {
+    hollaback.call(this, current.clone());
+    current.add(interval);
+  }
+}
+
 /**
  * @private
  */

lib/moment-range.js

@@ -186,6 +186,8 @@ DateRange.prototype.subtract = function(other) {
  * @param {(!DateRange|String)} range Date range to be used for iteration or
  *                                    shorthand string (shorthands:
  *                                    http://momentjs.com/docs/#/manipulating/add/)
+ *                              Can also use Object Literals for different intervals.
+ *                              Eg, {minutes: 30}
  * @param {!DateRange~by} hollaback Callback
  * @param {!boolean} exclusive Indicate that the end of the range should not
  *                             be included in the iter.
@@ -196,9 +198,12 @@ DateRange.prototype.by = function(range, hollaback, exclusive) {
   if (typeof range === 'string') {
     _byString.call(this, range, hollaback, exclusive);
   }
-  else {
+  else if ((range instanceof DateRange) || (typeof range === 'number')) {
     _byRange.call(this, range, hollaback, exclusive);
   }
+  else if (typeof range === 'object') {
+    _byObject.call(this, range, hollaback, exclusive);
+  }
   return this;
 };
 
@@ -223,6 +228,18 @@ function _byString(interval, hollaback, exclusive) {
   }
 }
 
+/**
+ * @private
+ */
+function _byObject(interval, hollaback, exclusive) {
+  var current = moment(this.start);
+
+  while (this.contains(current, exclusive)) {
+    hollaback.call(this, current.clone());
+    current.add(interval);
+  }
+}
+
 /**
  * @private
  */

test/moment-range.js

@@ -169,6 +169,24 @@ describe('DateRange', function() {
       acc[4].utc().date().should.eql(5);
     });
 
+    it('should iterate correctly by object literal', function(){
+      var acc = [];
+      var d1 = new Date(Date.UTC(2012, 1, 1));
+      var d2 = new Date(Date.UTC(2012, 1, 8));
+      var dr1 = moment.range(d1, d2);
+      var dr2 = {days:2};
+
+      dr1.by(dr2, function(m){
+        acc.push(m);
+      });
+
+      acc.length.should.eql(4);
+      acc[0].utc().date().should.eql(1);
+      acc[1].utc().date().should.eql(3);
+      acc[2].utc().date().should.eql(5);
+      acc[3].utc().date().should.eql(7);
+    });
+
     it('should iterate correctly by year over a Date-constructed range when leap years are involved', function() {
       var acc = [];
       var d1 = new Date(Date.UTC(2011, 1, 1));