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「應用」我有這個簡單的代碼,這似乎與對齊async.waterfall應如何使用,但我有這個類型錯誤mentionned:異步 - 類型錯誤:無法讀取屬性未定義
var myCallback = function (data){
console.log("task done for " + data);
}
var test = function (param,callback) {
console.log("in test, doing some work, param is: " + param);
callback(param);
};
async.waterfall([
test("call 1",myCallback),
test("call 2",myCallback),
test("call 3",myCallback)
], function (err, result) {
// result now equals 'done'
});
結果的執行是:
in test, doing some work, param is: call 1
task done for call 1
in test, doing some work, param is: call 2
task done for call 2
in test, doing some work, param is: call 3
task done for call 3
/Users/.../Documents/.../node_modules/async/dist/async.js:5021
task.apply(null, args);
^
TypeError: Cannot read property 'apply' of undefined
at nextTask (/.../node_modules/async/dist/async.js:5021:17)
at Object.waterfall (/.../node_modules/async/dist/async.js:5024:9)
at Object.<anonymous> (/.../app.js:77:7)
at Module._compile (module.js:409:26)
at Object.Module._extensions..js (module.js:416:10)
at Module.load (module.js:343:32)
at Function.Module._load (module.js:300:12)
at Function.Module.runMain (module.js:441:10)
at startup (node.js:139:18)
at node.js:968:3
我一直在環顧四周,但找不到問題 - 一些幫助歡迎。非常感謝! ç
您是否需要將前一個函數的結果傳遞給下一個函數,或者只是同步運行函數列表? –