Javascript - 仅循环打印最后一次迭代

Question

我想打印循环中的每个迭代（1,2,3,4,5）。但在这一刻，它只是打印我的数组的大小（5）。

for (var key in mapParseJson.background) { 

    //sequelize 
    refModelBedrawnins.find({ 
    where: ['POS_TILE_BE_DRAW_IN =? ',mapParseJson.background[key]   [0]], 
    include: [{ model: refModelDrawableObject }] 
    }).success(function(result) { 

    // I'd like to print every iteration right here 
    console.log(key); 
    }); 

} 

Answer 1

你需要避免关闭和保存VAR“键”值：

for (var key in mapParseJson.background) { 
    //sequelize 
    (function(k){ 
     refModelBedrawnins.find({ 
      where: ['POS_TILE_BE_DRAW_IN =? ', mapParseJson.background[k]   [0]], 
      include: [{model: refModelDrawableObject}] 
     }).success(function(result) { 
      console.log(k); 
     }); 
    })(key); 
}