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<?xml version="1.0" encoding="UTF-8" ?>
<class name="Dictionary" category="Built-In Types" version="3.2">
<brief_description>
Dictionary type.
</brief_description>
<description>
Dictionary type. Associative container which contains values referenced by unique keys. Dictionary are composed of pairs of keys (which must be unique) and values. You can define a dictionary by placing a comma separated list of [code]key: value[/code] pairs in curly braces [code]{}[/code].
Erasing elements while iterating over them [b]is not supported[/b].
Creating a dictionary:
[codeblock]
var my_dir = {} # Creates an empty dictionary.
var points_dir = {"White": 50, "Yellow": 75, "Orange": 100}
var my_dir = {
key1: value1,
key2: value2,
key3: value3,
}
[/codeblock]
You can access values of a dictionary by referencing appropriate key in above example [code]points_dir["White"][/code] would return value of 50.
[codeblock]
export(String, "White", "Yellow", "Orange") var my_color
var points_dir = {"White": 50, "Yellow": 75, "Orange": 100}
func _ready():
var points = points_dir[my_color]
[/codeblock]
In the above code [code]points[/code] will be assigned the value that is paired with the appropriate color selected in [code]my_color[/code].
Dictionaries can contain more complex data:
[codeblock]
my_dir = {"First Array": [1, 2, 3, 4]} # Assigns an Array to a String key.
[/codeblock]
To add a key to an existing dictionary, access it like an existing key and assign to it:
[codeblock]
var points_dir = {"White": 50, "Yellow": 75, "Orange": 100}
var points_dir["Blue"] = 150 # Add "Blue" as a key and assign 150 as its value.
[/codeblock]
Finally, dictionaries can contain different types of keys and values in the same dictionary:
[codeblock]
var my_dir = {"String Key": 5, 4: [1, 2, 3], 7: "Hello"} # This is a valid dictionary.
[/codeblock]
[b]Note:[/b] Unlike [Array]s you can't compare dictionaries directly:
[codeblock]
array1 = [1, 2, 3]
array2 = [1, 2, 3]
func compare_arrays():
print(array1 == array2) # Will print true.
dir1 = {"a": 1, "b": 2, "c": 3}
dir2 = {"a": 1, "b": 2, "c": 3}
func compare_dictionaries():
print(dir1 == dir2) # Will NOT print true.
[/codeblock]
You need to first calculate the dictionary's hash with [method hash] before you can compare them:
[codeblock]
dir1 = {"a": 1, "b": 2, "c": 3}
dir2 = {"a": 1, "b": 2, "c": 3}
func compare_dictionaries():
print(dir1.hash() == dir2.hash()) # Will print true.
[/codeblock]
</description>
<tutorials>
<link>https://docs.godotengine.org/en/latest/getting_started/scripting/gdscript/gdscript_basics.html#dictionary</link>
</tutorials>
<methods>
<method name="clear">
<description>
Clear the dictionary, removing all key/value pairs.
</description>
</method>
<method name="duplicate">
<return type="Dictionary">
</return>
<argument index="0" name="deep" type="bool" default="False">
</argument>
<description>
Creates a copy of the dictionary, and returns it.
</description>
</method>
<method name="empty">
<return type="bool">
</return>
<description>
Returns [code]true[/code] if the dictionary is empty.
</description>
</method>
<method name="erase">
<return type="bool">
</return>
<argument index="0" name="key" type="Variant">
</argument>
<description>
Erase a dictionary key/value pair by key. Returns [code]true[/code] if the given key was present in the dictionary, [code]false[/code] otherwise. Does not erase elements while iterating over the dictionary.
</description>
</method>
<method name="get">
<return type="Variant">
</return>
<argument index="0" name="key" type="Variant">
</argument>
<argument index="1" name="default" type="Variant" default="Null">
</argument>
<description>
Returns the current value for the specified key in the [Dictionary]. If the key does not exist, the method returns the value of the optional default argument, or [code]null[/code] if it is omitted.
</description>
</method>
<method name="has">
<return type="bool">
</return>
<argument index="0" name="key" type="Variant">
</argument>
<description>
Returns [code]true[/code] if the dictionary has a given key.
</description>
</method>
<method name="has_all">
<return type="bool">
</return>
<argument index="0" name="keys" type="Array">
</argument>
<description>
Returns [code]true[/code] if the dictionary has all of the keys in the given array.
</description>
</method>
<method name="hash">
<return type="int">
</return>
<description>
Returns a hashed integer value representing the dictionary contents. This can be used to compare dictionaries by value:
[codeblock]
var dict1 = {0: 10}
var dict2 = {0: 10}
# The line below prints `true`, whereas it would have printed `false` if both variables were compared directly.
print(dict1.hash() == dict2.hash())
[/codeblock]
</description>
</method>
<method name="keys">
<return type="Array">
</return>
<description>
Returns the list of keys in the [Dictionary].
</description>
</method>
<method name="size">
<return type="int">
</return>
<description>
Returns the size of the dictionary (in pairs).
</description>
</method>
<method name="values">
<return type="Array">
</return>
<description>
Returns the list of values in the [Dictionary].
</description>
</method>
</methods>
<constants>
</constants>
</class>
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