Make decimalPlaces private

src/core/core.helpers.js

@@ -125,8 +125,9 @@ module.exports = function() {
 	 * i.e. the number of digits after the decimal point, of the value of this Number.
 	 * @param {number} x - A number.
 	 * @returns {number} The number of decimal places.
+	 * @private
 	 */
-	helpers.decimalPlaces = function(x) {
+	helpers._decimalPlaces = function(x) {
 		if (!helpers.isFinite(x)) {
 			return;
 		}

src/scales/scale.linearbase.js

@@ -44,7 +44,7 @@ function generateTicks(generationOptions, dataRange) {
 
 	if (stepSize || isNullOrUndef(precision)) {
 		// If a precision is not specified, calculate factor based on spacing
-		factor = Math.pow(10, helpers.decimalPlaces(spacing));
+		factor = Math.pow(10, helpers._decimalPlaces(spacing));
 	} else {
 		// If the user specified a precision, round to that number of decimal places
 		factor = Math.pow(10, precision);

test/specs/core.helpers.tests.js

@@ -73,14 +73,14 @@ describe('Core helper tests', function() {
 	});
 
 	it('should get the correct number of decimal places', function() {
-		expect(helpers.decimalPlaces(100)).toBe(0);
-		expect(helpers.decimalPlaces(1)).toBe(0);
-		expect(helpers.decimalPlaces(0)).toBe(0);
-		expect(helpers.decimalPlaces(0.01)).toBe(2);
-		expect(helpers.decimalPlaces(-0.01)).toBe(2);
-		expect(helpers.decimalPlaces('1')).toBe(undefined);
-		expect(helpers.decimalPlaces('')).toBe(undefined);
-		expect(helpers.decimalPlaces(undefined)).toBe(undefined);
+		expect(helpers._decimalPlaces(100)).toBe(0);
+		expect(helpers._decimalPlaces(1)).toBe(0);
+		expect(helpers._decimalPlaces(0)).toBe(0);
+		expect(helpers._decimalPlaces(0.01)).toBe(2);
+		expect(helpers._decimalPlaces(-0.01)).toBe(2);
+		expect(helpers._decimalPlaces('1')).toBe(undefined);
+		expect(helpers._decimalPlaces('')).toBe(undefined);
+		expect(helpers._decimalPlaces(undefined)).toBe(undefined);
 	});
 
 	it('should get an angle from a point', function() {