Pas de Array.indexOf() dans node.js?

Bonjour, j'ai ce message d'erreur :

Code:

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/Users/solalrastier/tnl/obj/main.js:15
      while (__indexOf.call(this.games, game) >= 0) {
                       ^
TypeError: Array.prototype.indexOf called on null or undefined
    at indexOf (native)
    at People.buy (/Users/solalrastier/tnl/obj/main.js:15:24)
    at Object.<anonymous> (/Users/solalrastier/tnl/obj/main.js:59:57)
    at Object.<anonymous> (/Users/solalrastier/tnl/obj/main.js:70:4)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Function.Module.runMain (module.js:497:10)
    at startup (node.js:119:16)

Pouvez-vous m'aider?

le messages d'erreur est clair

tu fais null.indexOf(...); ou undefined.indexOf(...);.

vérifie l'existence de ton objet avant d'appeler la méthode.

et pourquoi faire __indexOf.call(this.games, game) et non this.games.indexOf(game) ?

A+JYT

Code:

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// Generated by CoffeeScript 1.7.1
(function() {
  var People, genre, genres, peoples, sharers, _i, _len,
    __indexOf = [].indexOf || function(item) { for (var i = 0, l = this.length; i < l; i++) { if (i in this && this[i] === item) return i; } return -1; };
 
  People = (function() {
    function People(n) {
      this.n = n;
      this.money = (Math.random() * 5000) + 5000;
      this.interest = genres[Math.round(Math.random())];
    }
 
    People.prototype.buy = function() {
      var game, seller;
      while (__indexOf.call(this.games, game) >= 0) {
        game = ["Proprietary adventure", "Free adventure", "Proprietary sandbox", "Free sandbox", "Proprietary " + this.interest, "Free " + this.interest][Math.floor(Math.random() * 7)];
      }
      seller = sharers[Math.round(Math.random() * sharers[game].length)];
      peoples[seller.n].money += seller.price;
      this.money -= seller.price;
      if (game[0] === 'F' && (Math.round(Math.random() * 5)) === 5) {
        sharers[game].push([this.n, Math.round(Math.random() * 5 === 5) ? Math.round(Math.random() * 499 + 1) : 0]);
      }
      return this.games.push(game);
    };
 
    return People;
 
  })();
 
  sharers = [];
 
  genres = ['sandbox', 'adventure'];
 
  peoples = [
    {
      money: 500000,
      money: 500000
    }
  ];
 
  for (_i = 0, _len = genres.length; _i < _len; _i++) {
    genre = genres[_i];
    sharers["Proprietary " + genre] = [peoples[0]];
    sharers["Free " + genre] = [peoples[1]];
  }
 
  (function() {
    var i, _results;
    i = 0;
    _results = [];
    while (i < 100) {
      _results.push(peoples[i] = new People(i++));
    }
    return _results;
  })();
 
  while (true) {
    peoples[Math.floor(Math.random() * peoples.length)].buy();
    if (peoples[0].money === -500000) {
      console.log("Free");
      break;
    }
    if (peoples[0].money === -500000) {
      console.log("Proprietary");
      break;
    }
  }
 
}).call(this);

C'est un code auto-généré par le compilateur CoffeeScript à partir de :

Code:

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class People
        constructor: (@n) ->
                @money = (do Math.random * 5000) + 5000
                @interest = genres[Math.round do Math.random]
        buy: ->
                while game in @games #Until he finds a game he have not
                        game = ["Proprietary adventure", "Free adventure", "Proprietary sandbox", "Free sandbox", "Proprietary #{@interest}", "Free #{@interest}"][Math.floor do Math.random * 7] #Search a random game
 
                seller = sharers[Math.round do Math.random * sharers[game].length]
                peoples[seller.n].money += seller.price
                @money -= seller.price
 
                sharers[game].push [@n, if Math.round do Math.random * 5 is 5 then Math.round do Math.random * 499 + 1 else 0] if game[0] is 'F' and (Math.round do Math.random * 5) is 5 #If the game is free AND he wants share this game, he share this game
 
                @games.push game
 
sharers = []
genres = ['sandbox', 'adventure']
 
#Companies creation
peoples = [money:500000, money:500000]
 
#Selling creation
for genre in genres
        sharers["Proprietary #{genre}"] = [peoples[0]]
        sharers["Free #{genre}"] = [peoples[1]]
 
#Gamers creation
do ->
        i = 0
        peoples[i] = new People i++ while i<100
 
#Action!
while true
        do peoples[Math.floor do Math.random * peoples.length].buy
        (console.log "Free";break) if peoples[0].money is -500000
        (console.log "Proprietary";break) if peoples[0].money is -500000

@games n'et pas initialisé dans ton constructeur
donc il n'existe pas
Tu ne peux donc pas faire un indexOf sur quelque chose qui n'existe pas.

A+JYT

Merci. Bon, il y a un autre problème mais je le poserais sur un autre topic.