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Clarify identical hash() return values due to collisions

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Hugo Locurcio 2022-02-12 22:17:35 +01:00
parent d3a6b6daaa
commit 08541fe11d
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4 changed files with 8 additions and 5 deletions
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4
doc/classes/Array.xml
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@ -299,8 +299,8 @@
<method name="hash" qualifiers="const">
<return type="int" />
<description>
Returns a hashed integer value representing the array and its contents.
[b]Note:[/b] Arrays with equal contents can still produce different hashes. Only the exact same arrays will produce the same hashed integer value.
Returns a hashed 32-bit integer value representing the array and its contents.
[b]Note:[/b] [Array]s with equal content will always produce identical hash values. However, the reverse is not true. Returning identical hash values does [i]not[/i] imply the arrays are equal, because different arrays can have identical hash values due to hash collisions.
</description>
</method>
<method name="insert">

3
doc/classes/Callable.xml
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@ -98,7 +98,8 @@
<method name="hash" qualifiers="const">
<return type="int" />
<description>
Returns the hash value of this [Callable]'s object.
Returns the 32-bit hash value of this [Callable]'s object.
[b]Note:[/b] [Callable]s with equal content will always produce identical hash values. However, the reverse is not true. Returning identical hash values does [i]not[/i] imply the callables are equal, because different callables can have identical hash values due to hash collisions. The engine uses a 32-bit hash algorithm for [method hash].
</description>
</method>
<method name="is_custom" qualifiers="const">

3
doc/classes/Dictionary.xml
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@ -259,7 +259,7 @@
<method name="hash" qualifiers="const">
<return type="int" />
<description>
Returns a hashed integer value representing the dictionary contents. This can be used to compare dictionaries by value:
Returns a hashed 32-bit integer value representing the dictionary contents. This can be used to compare dictionaries by value:
[codeblocks]
[gdscript]
var dict1 = {0: 10}
@ -276,6 +276,7 @@
[/csharp]
[/codeblocks]
[b]Note:[/b] Dictionaries with the same keys/values but in a different order will have a different hash.
[b]Note:[/b] Dictionaries with equal content will always produce identical hash values. However, the reverse is not true. Returning identical hash values does [i]not[/i] imply the dictionaries are equal, because different dictionaries can have identical hash values due to hash collisions.
</description>
</method>
<method name="is_empty" qualifiers="const">

3
doc/classes/String.xml
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@ -241,7 +241,8 @@
<method name="hash" qualifiers="const">
<return type="int" />
<description>
Hashes the string and returns a 32-bit integer.
Returns the 32-bit hash value representing the string's contents.
[b]Note:[/b] [String]s with equal content will always produce identical hash values. However, the reverse is not true. Returning identical hash values does [i]not[/i] imply the strings are equal, because different strings can have identical hash values due to hash collisions.
</description>
</method>
<method name="hex_to_int" qualifiers="const">