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-rw-r--r--doc/classes/Dictionary.xml53
1 files changed, 49 insertions, 4 deletions
diff --git a/doc/classes/Dictionary.xml b/doc/classes/Dictionary.xml
index 7cb6b1b754..d37c4cc76f 100644
--- a/doc/classes/Dictionary.xml
+++ b/doc/classes/Dictionary.xml
@@ -4,16 +4,61 @@
Dictionary type.
</brief_description>
<description>
- Dictionary type. Associative container which contains values referenced by unique keys. Dictionaries are always passed by reference.
+ 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 d = {4: 5, "A key": "A value", 28: [1, 2, 3]}
+ 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]
- d[4] = "hello" # Add integer 4 as a key and assign the String "hello" as its value.
- d["Godot"] = 3.01 # Add String "Godot" as a key and assign the value 3.01 to it.
+ 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>