Fix #57 - accept and ignore count.

README.md

@@ -458,9 +458,9 @@ x.ticks(d3.timeMinute.filter(function(d) {
 
 Note: in some cases, such as with day ticks, specifying a *step* can result in irregular spacing of ticks because time intervals have varying length.
 
-<a name="time_tickFormat" href="#time_tickFormat">#</a> <i>time</i>.<b>tickFormat</b>([<i>specifier</i>])
+<a name="time_tickFormat" href="#time_tickFormat">#</a> <i>time</i>.<b>tickFormat</b>([<i>count</i>[, <i>specifier</i>]])
 
-Returns a time format function suitable for displaying [tick](#time_ticks) values. If a format *specifier* is specified, this method is equivalent to [format](https://github.com/d3/d3-time-format#format). If *specifier* is not specified, the default time format is returned. The default multi-scale time format chooses a human-readable representation based on the specified date as follows:
+Returns a time format function suitable for displaying [tick](#time_ticks) values. The specified *count* is currently ignored, but is accepted for consistency with other scales such as [*continuous*.tickFormat](#continuous_tickFormat). If a format *specifier* is specified, this method is equivalent to [format](https://github.com/d3/d3-time-format#format). If *specifier* is not specified, the default time format is returned. The default multi-scale time format chooses a human-readable representation based on the specified date as follows:
 
 * `%Y` - for year boundaries, such as `2011`.
 * `%B` - for month boundaries, such as `February`.

src/time.js

@@ -107,7 +107,7 @@ export function calendar(year, month, week, day, hour, minute, second, milliseco
     return r ? t.reverse() : t;
   };
 
-  scale.tickFormat = function(specifier) {
+  scale.tickFormat = function(count, specifier) {
     return specifier == null ? tickFormat : format(specifier);
   };
 

test/time-test.js

@@ -443,8 +443,8 @@ tape("time.tickFormat()(date) otherwise, formats second", function(test) {
   test.end();
 });
 
-tape("time.tickFormat(specifier) returns a time format for the specified specifier", function(test) {
-  var f = scale.scaleTime().tickFormat("%c");
+tape("time.tickFormat(count, specifier) returns a time format for the specified specifier", function(test) {
+  var f = scale.scaleTime().tickFormat(10, "%c");
   test.equal(f(date.local(2011, 1, 2, 12)), "Wed Feb  2 12:00:00 2011");
   test.end();
 });

test/utcTime-test.js

@@ -436,8 +436,8 @@ tape("scaleUtc.tickFormat()(date) otherwise, formats second", function(test) {
   test.end();
 });
 
-tape("scaleUtc.tickFormat(specifier) returns a time format for the specified specifier", function(test) {
-  var f = scale.scaleUtc().tickFormat("%c");
+tape("scaleUtc.tickFormat(count, specifier) returns a time format for the specified specifier", function(test) {
+  var f = scale.scaleUtc().tickFormat(10, "%c");
   test.equal(f(date.utc(2011, 1, 2, 12)), "Wed Feb  2 12:00:00 2011");
   test.end();
 });