lib: add Lib.noop method

Author: etpinard

src/lib/index.js

@@ -121,6 +121,9 @@ lib.bBoxIntersect = function(a, b, pad) {
 // minor convenience/performance booster for d3...
 lib.identity = function(d) { return d; };
 
+// minor convenience helper
+lib.noop = function() {};
+
 // random string generator
 lib.randstr = function randstr(existing, bits, base) {
     /*

src/plots/gl3d/layout/axis_defaults.js

@@ -17,7 +17,6 @@ var layoutAttributes = require('./axis_attributes');
 var handleAxisDefaults = require('../../cartesian/axis_defaults');
 
 var axesNames = ['xaxis', 'yaxis', 'zaxis'];
-var noop = function() {};
 
 // TODO: hard-coded lightness fraction based on gridline default colors
 // that differ from other subplot types.
@@ -53,7 +52,7 @@ module.exports = function supplyLayoutDefaults(layoutIn, layoutOut, options) {
         coerce('gridcolor', colorMix(containerOut.color, options.bgColor, gridLightness).toRgbString());
         coerce('title', axName[0]);  // shouldn't this be on-par with 2D?
 
-        containerOut.setScale = noop;
+        containerOut.setScale = Lib.noop;
 
         if(coerce('showspikes')) {
             coerce('spikesides');

src/plots/gl3d/set_convert.js

@@ -9,12 +9,11 @@
 
 'use strict';
 
+var Lib = require('../../lib');
 var Axes = require('../cartesian/axes');
 
-var noop = function() {};
-
 
 module.exports = function setConvert(containerOut) {
     Axes.setConvert(containerOut);
-    containerOut.setScale = noop;
+    containerOut.setScale = Lib.noop;
 };