【 在 zhanghaoX (环顾四方有效) 的大作中提到: 】
:  一份代码里的：
:  var   _         = require('underscore'),                  // 这种变量命名到底是是啥意思？

nothing special with _, just a name
just the name the library author sets as conventional

:        Promise   = require("node-promise").Promise,
:        when      = require("node-promise").when,           //在node里找不到这个when 啊？

https://www.npmjs.com/package/node-promise

:   ……
:     // execute the command
:         when(canExecute, function (canExecute){
:             if(canExecute){
:                 when(that.genericCommand(cmd), function (result) {
:                         promise.resolve(result);
:                     }, function (error) {
:                         promise.resolve(DriverResponse.Failure(Status.State.ERROR, DriverResponse.Errors.BAD_STATE));
:                     }
:                 );
:             } else {
:                 promise.resolve(DriverResponse.Failure(Status.State.ERROR, DriverResponse.Errors.BAD_STATE));
:             }
:         });
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FROM 180.173.170.*