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From the above command class code, we can see that any operation has an execute method to perform the operation. The above code uses traditional object-oriented programming to implement the command mode. The procedural request call of the command mode is encapsulated in the execute method of the command object. Have we found the above writing code a little cumbersome? We can do this using the callback functions in javascript, In object-oriented, The receiver of the command mode is saved as an attribute of the command object, and the command execution operation is agreed to call the command.execute method. However, if we use the callback function, then the receiver is closed in the environment where the callback function is generated, and the execution operation will be simpler. Only the callback function can be executed. Let's look at the following code:众人这才震惊，只有周夫子看着郑氏出神。? Add an optional formal parameter to the function make _ album () so that the number of songs contained in the album can be stored. If the number of songs is specified when calling this function, this value is added to the dictionary representing the album. Call this function and specify the number of songs the album contains at least once.Report天城制药的派遣社员·佐藤唯（松井爱莉饰）因为爱犬死亡的悲伤，在酒吧里喝酒。与一个前来搭话的男子产生争执。没想到该名男子正是公司社长天城恭一（速水直道饰）。第二天，被社长叫去的唯，抱着被炒鱿鱼的觉悟来到了办公室。但是天城却对她说，“请把我当成奴隶”。一名男子被一名有权势的政客女儿猛烈追求,后者不惜一切想的到他。他于是铤而走险,试图让自己的生活重回正轨