标签：tar dia strong imm called ext show html main
【async.waterfall】
if any of the tasks pass an error to their own callback, the next function is not executed, and the main callback is immediately called with the error.
async.waterfall([ function(callback) { callback(null, ‘one‘, ‘two‘); }, function(arg1, arg2, callback) { // arg1 now equals ‘one‘ and arg2 now equals ‘two‘ callback(null, ‘three‘); }, function(arg1, callback) { // arg1 now equals ‘three‘ callback(null, ‘done‘); } ], function (err, result) { // result now equals ‘done‘ });
// Or, with named functions: async.waterfall([ myFirstFunction, mySecondFunction, myLastFunction, ], function (err, result) { // result now equals ‘done‘ }); function myFirstFunction(callback) { callback(null, ‘one‘, ‘two‘); } function mySecondFunction(arg1, arg2, callback) { // arg1 now equals ‘one‘ and arg2 now equals ‘two‘ callback(null, ‘three‘); } function myLastFunction(arg1, callback) { // arg1 now equals ‘three‘ callback(null, ‘done‘); }
参考：https://caolan.github.io/async/docs.html#waterfall
标签：tar dia strong imm called ext show html main
原文地址：http://www.cnblogs.com/tekkaman/p/7490846.html
