Merge pull request #62118 from dalexeev/empty-array-any-all-docs

Clarify `all` and `any` documentation for empty arrays

1 files changed, 7 insertions, 3 deletions

diff --git a/doc/classes/Array.xml b/doc/classes/Array.xml
index 94181db95f..c149cdc0e4 100644
--- a/doc/classes/Array.xml
+++ b/doc/classes/Array.xml
@@ -131,9 +131,10 @@
 				The callable's method should take one [Variant] parameter (the current array element) and return a boolean value.
 				[codeblock]
 				func _ready():
-				    print([6, 10, 6].all(greater_than_5))  # Prints True (3 elements evaluate to `true`).
-				    print([4, 10, 4].all(greater_than_5))  # Prints False (1 elements evaluate to `true`).
-				    print([4, 4, 4].all(greater_than_5))  # Prints False (0 elements evaluate to `true`).
+				    print([6, 10, 6].all(greater_than_5))  # Prints True (3/3 elements evaluate to `true`).
+				    print([4, 10, 4].all(greater_than_5))  # Prints False (1/3 elements evaluate to `true`).
+				    print([4, 4, 4].all(greater_than_5))  # Prints False (0/3 elements evaluate to `true`).
+				    print([].all(greater_than_5))  # Prints True (0/0 elements evaluate to `true`).
 
 				    print([6, 10, 6].all(func(number): return number > 5))  # Prints True. Same as the first line above, but using lambda function.
 
@@ -142,6 +143,7 @@
 				[/codeblock]
 				See also [method any], [method filter], [method map] and [method reduce].
 				[b]Note:[/b] Unlike relying on the size of an array returned by [method filter], this method will return as early as possible to improve performance (especially with large arrays).
+				[b]Note:[/b] For an empty array, this method [url=https://en.wikipedia.org/wiki/Vacuous_truth]always[/url] returns [code]true[/code].
 			</description>
 		</method>
 		<method name="any" qualifiers="const">
@@ -155,6 +157,7 @@
 				    print([6, 10, 6].any(greater_than_5))  # Prints True (3 elements evaluate to `true`).
 				    print([4, 10, 4].any(greater_than_5))  # Prints True (1 elements evaluate to `true`).
 				    print([4, 4, 4].any(greater_than_5))  # Prints False (0 elements evaluate to `true`).
+				    print([].any(greater_than_5))  # Prints False (0 elements evaluate to `true`).
 
 				    print([6, 10, 6].any(func(number): return number &gt; 5))  # Prints True. Same as the first line above, but using lambda function.
 
@@ -163,6 +166,7 @@
 				[/codeblock]
 				See also [method all], [method filter], [method map] and [method reduce].
 				[b]Note:[/b] Unlike relying on the size of an array returned by [method filter], this method will return as early as possible to improve performance (especially with large arrays).
+				[b]Note:[/b] For an empty array, this method always returns [code]false[/code].
 			</description>
 		</method>
 		<method name="append">