摘要：转载自:http://www.infomerchant.net/creditcardprocessing/credit_card_test_numbers.htmlThese credit card numbers can be used to test atransaction at ECHO. They are numbers that banks will reject asinvalid without problem and are intended for system testing.These test numbers work just like live accounts, 阅读全文

摘要：1. Inability to reason about code Reasoning about code means being able to follow the execution path ("running the program in your head") while knowing what the goal of the code is. Symptoms The pres... 阅读全文