From d449bbc83aa5ea94ad2912d593500e561d0d94bb Mon Sep 17 00:00:00 2001
From: Ben McCann <322311+benmccann@users.noreply.github.com>
Date: Thu, 30 Jan 2020 16:23:40 -0800
Subject: [PATCH] Remove unused helpers (#7039)

---
 docs/getting-started/v3-migration.md |  3 +++
 src/helpers/index.js                 | 37 ----------------------------
 test/specs/core.helpers.tests.js     | 13 ----------
 3 files changed, 3 insertions(+), 50 deletions(-)

diff --git a/docs/getting-started/v3-migration.md b/docs/getting-started/v3-migration.md
index 76d8a53d0..a7e8345a0 100644
--- a/docs/getting-started/v3-migration.md
+++ b/docs/getting-started/v3-migration.md
@@ -91,6 +91,9 @@ Animation system was completely rewritten in Chart.js v3. Each property can now
 * `helpers.addEvent`
 * `helpers.aliasPixel`
 * `helpers.configMerge`
+* `helpers.findIndex`
+* `helpers.findNextWhere`
+* `helpers.findPreviousWhere`
 * `helpers.indexOf`
 * `helpers.lineTo`
 * `helpers.longestText` was moved to the `helpers.canvas` namespace and made private
diff --git a/src/helpers/index.js b/src/helpers/index.js
index df5d4fbd0..8e28efcdc 100644
--- a/src/helpers/index.js
+++ b/src/helpers/index.js
@@ -36,43 +36,6 @@ export default {
 	math,
 	rtl,
 
-	findIndex: Array.prototype.findIndex ?
-		function(array, callback, scope) {
-			return array.findIndex(callback, scope);
-		} :
-		function(array, callback, scope) {
-			scope = scope === undefined ? array : scope;
-			for (var i = 0, ilen = array.length; i < ilen; ++i) {
-				if (callback.call(scope, array[i], i, array)) {
-					return i;
-				}
-			}
-			return -1;
-		},
-	findNextWhere: function(arrayToSearch, filterCallback, startIndex) {
-		// Default to start of the array
-		if (coreHelpers.isNullOrUndef(startIndex)) {
-			startIndex = -1;
-		}
-		for (var i = startIndex + 1; i < arrayToSearch.length; i++) {
-			var currentItem = arrayToSearch[i];
-			if (filterCallback(currentItem)) {
-				return currentItem;
-			}
-		}
-	},
-	findPreviousWhere: function(arrayToSearch, filterCallback, startIndex) {
-		// Default to end of the array
-		if (coreHelpers.isNullOrUndef(startIndex)) {
-			startIndex = arrayToSearch.length;
-		}
-		for (var i = startIndex - 1; i >= 0; i--) {
-			var currentItem = arrayToSearch[i];
-			if (filterCallback(currentItem)) {
-				return currentItem;
-			}
-		}
-	},
 	// Implementation of the nice number algorithm used in determining where axis labels will go
 	niceNum: function(range, round) {
 		var exponent = Math.floor(math.log10(range));
diff --git a/test/specs/core.helpers.tests.js b/test/specs/core.helpers.tests.js
index 308438e04..d7fc8e30d 100644
--- a/test/specs/core.helpers.tests.js
+++ b/test/specs/core.helpers.tests.js
@@ -6,19 +6,6 @@ describe('Core helper tests', function() {
 		helpers = window.Chart.helpers;
 	});
 
-	it('should filter an array', function() {
-		var data = [-10, 0, 6, 0, 7];
-		var callback = function(item) {
-			return item > 2;
-		};
-		expect(helpers.findNextWhere(data, callback)).toEqual(6);
-		expect(helpers.findNextWhere(data, callback, 2)).toBe(7);
-		expect(helpers.findNextWhere(data, callback, 4)).toBe(undefined);
-		expect(helpers.findPreviousWhere(data, callback)).toBe(7);
-		expect(helpers.findPreviousWhere(data, callback, 3)).toBe(6);
-		expect(helpers.findPreviousWhere(data, callback, 0)).toBe(undefined);
-	});
-
 	it('should generate integer ids', function() {
 		var uid = helpers.uid();
 		expect(uid).toEqual(jasmine.any(Number));
-- 
2.47.2