[英]js_of_ocaml and Deriving_Json
I need some help to get js_of_ocaml working. 我需要一些帮助才能让js_of_ocaml正常工作。 There's not much information about it on the net, and the manual is very sparse (no snippets or usage examples, no comment sections).
在网上没有太多关于它的信息,手册非常稀疏(没有片段或用法示例,没有评论部分)。
I have a Card
module on the server with a card
record. 我在服务器上有一个带有
card
记录的Card
模块。 I'm sending a card list
to the client using Ajax, and there I want to read and traverse this list. 我正在使用Ajax向客户端发送
card list
,我想阅读并遍历此列表。 What I end up with is this: 我最终得到的是:
let json = Json.unsafe_input (Js.string http_frame.XmlHttpRequest.content) in
...where json
has type 'a
, according to documentation (not when I run it, of course). ...根据文档(当我运行它时,
json
类型为'a
)。
I can log json##length
and get the correct length of the list. 我可以记录
json##length
并获得正确的列表长度。 Where do I go from here? 我从哪里开始? Ideally, I'd like to use
Deriving_Json
to type-safe get a card list
again, but I could also use a for-loop (not as elegant, but whatever). 理想情况下,我想使用
Deriving_Json
再次输入类型安全获取card list
,但我也可以使用for循环(不是优雅,但无论如何)。
Type declarations like type name = ... deriving(Json)
creates Json_name
module. 类型声明,如
type name = ... deriving(Json)
Json_name
type name = ... deriving(Json)
创建Json_name
模块。 Here is example. 这是一个例子。
type card = {a: int; b: string; } deriving(Json)
type t = card list deriving(Json)
let _ =
let str = Json.to_string<t> [{a = 10; b = "abc";}; {a = 20; b = "xyz";}] in
let rs = Json.from_string<t> str in
Firebug.console##log(Js.string str);
List.iter (fun r -> Firebug.console##log_2(r.a, Js.string r.b)) rs
And I'm not sure why, I got "Uncaught ReferenceError: unix_inet_addr_of_string is not defined". 而且我不确定为什么,我得到了“Uncaught ReferenceError:unix_inet_addr_of_string未定义”。
So add function unix_inet_addr_of_string () {return 0;}
to js file. 所以将
function unix_inet_addr_of_string () {return 0;}
到js文件中。
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