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