Add sort capability to array_equal.

share/array.sh

@@ -374,6 +374,7 @@ array_equal()
 {
      $(opt_parse \
         "+verbose v | Enable verbose mode to show which elements differ." \
+        "+sort    s | Sort both arrays before comparision."               \
         "__array1   | First array for comparison."                        \
         "__array2   | Second array for comparison."                       \
     )
@@ -387,6 +388,12 @@ array_equal()
         return 1
     fi
 
+    # Optionally sort the arrays before comparision.
+    if [[ "${sort}" -eq 1 ]]; then
+        array_sort __array1
+        array_sort __array2
+    fi
+
     # We don't want to simply try to join the arrays into a single string and check that for equality as that could
     # result in incorrect behavior with certain input values, e.g. array1=( "a 1 a" "1") array2=( "a 1" "a 1" ). And we
     # can't just iterate over the indexes directly as the arrays could be holey (e.g. after an unset or a remove

tests/array.etest

@@ -582,6 +582,15 @@ ETEST_array_equal()
     array_equal array1 array2
 }
 
+ETEST_array_equal_sort()
+{
+    local array1=( {a..z} )
+    local array2=( {z..a} )
+    etestmsg "Comparing $(lval array1 array2)"
+
+    array_equal --sort array1 array2
+}
+
 ETEST_array_equal_spaces()
 {
     local array1=("a 1" "b 2" "c 3" "d 4")