Sync flatten-array docs and metadata

exercises/practice/flatten-array/.docs/instructions.md

@@ -1,11 +1,16 @@
 # Instructions
 
-Take a nested list and return a single flattened list with all values except nil/null.
+Take a nested array of any depth and return a fully flattened array.
 
-The challenge is to write a function that accepts an arbitrarily-deep nested list-like structure and returns a flattened structure without any nil/null values.
+Note that some language tracks may include null-like values in the input array, and the way these values are represented varies by track.
+Such values should be excluded from the flattened array.
 
-For example:
+Additionally, the input may be of a different data type and contain different types, depending on the track.
 
-input: [1,[2,3,null,4],[null],5]
+Check the test suite for details.
 
-output: [1,2,3,4,5]
+## Example
+
+input: `[1, [2, 6, null], [[null, [4]], 5]]`
+
+output: `[1, 2, 6, 4, 5]`

exercises/practice/flatten-array/.docs/introduction.md

@@ -0,0 +1,7 @@
+# Introduction
+
+A shipment of emergency supplies has arrived, but there's a problem.
+To protect from damage, the items — flashlights, first-aid kits, blankets — are packed inside boxes, and some of those boxes are nested several layers deep inside other boxes!
+
+To be prepared for an emergency, everything must be easily accessible in one box.
+Can you unpack all the supplies and place them into a single box, so they're ready when needed most?

exercises/practice/flatten-array/.meta/tests.toml

@@ -32,12 +32,32 @@ description = "null values are omitted from the final result"
 
 [c6cf26de-8ccd-4410-84bd-b9efd88fd2bc]
 description = "consecutive null values at the front of the list are omitted from the final result"
+include = false
+
+[bc72da10-5f55-4ada-baf3-50e4da02ec8e]
+description = "consecutive null values at the front of the array are omitted from the final result"
+reimplements = "c6cf26de-8ccd-4410-84bd-b9efd88fd2bc"
 
 [382c5242-587e-4577-b8ce-a5fb51e385a1]
 description = "consecutive null values in the middle of the list are omitted from the final result"
+include = false
+
+[6991836d-0d9b-4703-80a0-3f1f23eb5981]
+description = "consecutive null values in the middle of the array are omitted from the final result"
+reimplements = "382c5242-587e-4577-b8ce-a5fb51e385a1"
 
 [ef1d4790-1b1e-4939-a179-51ace0829dbd]
 description = "6 level nest list with null values"
+include = false
+
+[dc90a09c-5376-449c-a7b3-c2d20d540069]
+description = "6 level nested array with null values"
+reimplements = "ef1d4790-1b1e-4939-a179-51ace0829dbd"
 
 [85721643-705a-4150-93ab-7ae398e2942d]
 description = "all values in nested list are null"
+include = false
+
+[51f5d9af-8f7f-4fb5-a156-69e8282cb275]
+description = "all values in nested array are null"
+reimplements = "85721643-705a-4150-93ab-7ae398e2942d"

exercises/practice/flatten-array/flatten_array_test.gd

@@ -40,25 +40,25 @@ func test_null_values_are_omitted_from_the_final_result(solution_script):
 	return [solution_script.flatten(inputs), expected]
 
 
-func test_consecutive_null_values_at_the_front_of_the_list_are_omitted_from_the_final_result(solution_script):
+func test_consecutive_null_values_at_the_front_of_the_array_are_omitted_from_the_final_result(solution_script):
 	var inputs = [null, null, 3]
 	var expected = [3]
 	return [solution_script.flatten(inputs), expected]
 
 
-func test_consecutive_null_values_in_the_middle_of_the_list_are_omitted_from_the_final_result(solution_script):
+func test_consecutive_null_values_in_the_middle_of_the_array_are_omitted_from_the_final_result(solution_script):
 	var inputs = [1, null, null, 4]
 	var expected = [1, 4]
 	return [solution_script.flatten(inputs), expected]
 
 
-func test_6_level_nest_list_with_null_values(solution_script):
+func test_6_level_nest_array_with_null_values(solution_script):
 	var inputs = [0, 2, [[2, 3], 8, [[100]], null, [[null]]], -2]
 	var expected = [0, 2, 2, 3, 8, 100, -2]
 	return [solution_script.flatten(inputs), expected]
 
 
-func test_all_values_in_nested_list_are_null(solution_script):
+func test_all_values_in_nested_array_are_null(solution_script):
 	var inputs = [null, [[[null]]], null, null, [[null, null], null], null]
 	var expected = []
 	return [solution_script.flatten(inputs), expected]