ClojureScript自引用

Question

我正在尝试将JavaScript转换为ClojureScript一些简单的示例来熟悉ClojureScript，但是对于它的地狱，我无法理解这个snippet

var game = new Phaser.Game(800, 600, Phaser.CANVAS, 'example', { create: create });

function create() {
    var text = "- phaser -\n with a sprinkle of \n pixi dust.";
    var style = { font: "65px Arial", fill: "#ff0044", align: "center" };

    var t = game.add.text(game.world.centerX-300, 0, text, style);
}

至：

;; Uncaught ReferenceError: game is not defined
(defn create []
  (let [text "- phaser -\n with a sprinkle of \n pixi dust."
        style (js-obj "font" "65px Arial" "fill" "#ff0044" "align" "center")]
    (game.add.text (- game.world.centerX 300) 0 text style)))

(def game (js/Phaser.Game. 800 600 js/Phaser.CANVAS "example" #js {:create create}))

问题是，我还试图从ClojureScript中的函数中自引用要定义的对象-我有一种感觉，在ClojureScript中这是不正确的和/或惯用的思维方式，那么如何处理这种情况呢？

编辑：

;; Working example
(declare game)

(defn create []
  (let [text "- phaser -\n with a sprinkle of \n pixi dust."
        style (js-obj "font" "65px Arial" "fill" "#ff0044" "align" "center")]
    (.text game.add (- (.-centerX game.world) 300) 0 text style)))

(def game (js/Phaser.Game. 800 600 js/Phaser.CANVAS "example"  #js {:create create}))

Answer 1

Clojure不会在函数之后提取定义，因此它超出了范围。你可以把它放在作用域中，把它移到函数的上面，或者在你的文件顶部declare它。

https://clojuredocs.org/clojure.core/declare