Resolved: Array of objects in Crystal

struct Book<br />
   def initialize(<br />
     @Id : Int32,<br />
     @Title : String,<br />
     @Author : String,<br />
     @Desc : String<br />
   )<br />
   end<br />
 end</p>
<p> books = [] of Int32 | String <--- This is wrong
 book1 = Book.new(1, "Hello", "Me", "This is a test.")


GO CODE: 

type Book struct {
   Id     int    `json:"id"`
   Title  string `json:"title"`
   Author string `json:"author"`
   Desc   string `json:"desc"`
}

var Books = []models.Book{
   {
       Id:     1,
       Title:  "Golang",
       Author: "Gopher",
       Desc:   "A book for Go",
   },
}
[/code]

</p>



<h2>Answer:</h2>



You can write<br> 


<p>[code]books = [] of Book<br />
books << book1
[/code]

</p>



or you can simply do this, and let Crystal recognise the type:<br> 


<p>[code]books = [book1]

books = [
  Book.new(1, "Hello", "Me", "This is a test.")
]