From 550a3756da650fe3f3481fa13ce42092c39e5000 Mon Sep 17 00:00:00 2001
From: archmoj <mojtaba@plot.ly>
Date: Wed, 18 Mar 2020 14:35:01 -0400
Subject: [PATCH] improve matching - only need to test first two bounds - avoid
 touching bounds length

---
 src/plots/cartesian/axis_defaults.js | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/src/plots/cartesian/axis_defaults.js b/src/plots/cartesian/axis_defaults.js
index 19661d0bb92..0564eaa5319 100644
--- a/src/plots/cartesian/axis_defaults.js
+++ b/src/plots/cartesian/axis_defaults.js
@@ -165,17 +165,19 @@ function rangebreaksDefaults(itemIn, itemOut, containerOut) {
 
             var dfltPattern = '';
             var i, q;
-            for(i = 0; i < bnds.length; i++) {
-                q = indexOfDay(bnds[i]);
-                if(q) {
-                    dfltPattern = DAY_OF_WEEK;
-                    break;
+            if(bnds.length === 2) {
+                for(i = 0; i < 2; i++) {
+                    q = indexOfDay(bnds[i]);
+                    if(q) {
+                        dfltPattern = DAY_OF_WEEK;
+                        break;
+                    }
                 }
             }
             var pattern = coerce('pattern', dfltPattern);
 
-            if(pattern === DAY_OF_WEEK) {
-                for(i = 0; i < bnds.length; i++) {
+            if(bnds.length === 2 && pattern === DAY_OF_WEEK) {
+                for(i = 0; i < 2; i++) {
                     q = indexOfDay(bnds[i]);
                     if(q) {
                         // convert to integers i.e 'Sunday' --> 0