Javascript - for循环仅打印最后一次迭代

Question

我想打印循环中的每次迭代(1,2,3,4,5)。但此时，它仅打印数组的大小 (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

您需要避免关闭并保存 var“key”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);
}