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Some properties and Database title have an array of RichTextObject. RichTextArray is the delegate class for the array of RichTextObject. Moreover, some methods of TitleProperty, RichTextProperty and Database.title delegate to the included RichTextArray.

1. Singleton methods

rich_text_array(key, text_info = [])

[PARAM] key keyword for JSON
[PARAM(optional)] text_info

<aside> 📃 The following objects are used for this argument.
- a String like as “text” (String)
- an Array of Strings (Array of Strings)
- a RichTextObject (RichTextObject)
- an Array of RichTextObjects (Array of RichTextObjects)
- a RichTextArray (RichTextArray) </aside>

RichTextArray can be created by a String, some Strings, a RichTextObject and some RichTextObjects. RichTextArray has Array of RichTextObjects. String values will convert to simple TextObjects. If string_contes is already RichTextArray, this method returns the given the RichTextArray.

nullString = RichTextArray.rich_text_array "title"
aString = RichTextArray.rich_text_array "title", "A string"
twoStrings = RichTextArray.rich_text_array "title", %W[ABC\\\\n DEF]
aTextObject = RichTextArray.rich_text_array "title", TextObject.new("A TextObject")
textMentionObjects = RichTextArray.rich_text_array "title", [TextObject.new("A TextObject"), MentionObject.new(user_id: "ABC")]
richTextArray = RichTextArray.rich_text_array "title", textMentionObjects # richTextArray == textMentionObjects

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2. Instance methods

<<(value) → RichTextObject

[PARAM] value
- a String like as “text” (String)
- a RichTextObject (RichTextObject)

<< appends a text or RichTextObject. String value will convert to simple TextObject.

db.database_title << "title"
db.database_title << MentionObject.new(user_id: "AAA")

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self[pos] → RichTextObject

[PARAM] pos index

self[pos] returns a RichTextObject.

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