Why do programmers have the idea that code can run without moving? Is it poisonous? Or what?

An interesting thing happened in the company .

01

First of all, let me introduce my company code , Probably 5 Years ago , The company needs to upgrade gcc Code , Try turning docker, Put it in the cloud environment , However, this batch of code is 2000 In, there was , The earliest part may be written in 1980 years bell laboratory , The first batch of people who need maintenance and upgrading have long retired , The second group also retired , Every line of code moves with fear .

 

Then Lao Zhang suddenly shouted at work that day , Ask loudly who changed the code , So obvious bug Can come out , Don't write notes yet .

Because there was a major accident in production , Otherwise Lao Zhang wouldn't be so angry , System memory leak , The system crashed , Affect customer use .

At that time, the project manager spoke , You check git Record of submission , See who submitted the code , Find out that the whole company notifies , Deduct his year-end bonus and project bonus .

 

Then Lao Zhang said , Looks very angry , say , I'm already checking .

After a few minutes , I only heard Lao Zhang say ： Impossible , How could it be ？

So the project manager came up to see , I found that this code was submitted by Lao Zhang himself a year ago .

Don't mention how embarrassed Lao Zhang was at that time .

It is hard to imagine , How much shit the code of this project will be , After the senior programmer moved, he didn't know it was written by himself , So who else dares to move ？

02

Then Lao Zhang was criticized by the whole company , Require the project team to rectify , And a review . Now can you understand ？ Code can run , Don't change it , If you change it, there may be some moths .

 

Changing the code is not a person's business , But the common work of development and testing , Can run , It can run even if the code looks chaotic , Also passed the professional test . And the code you changed , You can't experience as much testing as old code in a short time . There may be hidden diseases . Unless the company decides to refactor the code , To move .

 

also , Code that can run without moving , Generally, it will be called Shishan like code , I believe we all have the fear of being dominated by Shishan , The humiliating experience of being trapped in Shishan , The only way to control the shit mountain , Not change , It is No changes .

 

What I want to say is , If your code can run , But you don't know why it can run , You'd better not submit this code , Understand and then submit . A colleague wrote a code before , The function is for capacity 1000 The user of a server is assigned a unique ID. His approach is also very simple , You can run, too ？ But when it's online , The number of online users of this server is about 800-900 about , It will probably lead to server downtime . After reading his practice , Is in 1-1000 Take a random number from , If this number is used , Change a number randomly , Then determine whether someone uses , repeat . When there are more users , Assign new ID when , Will hit frequently ID, It's hard to jump out of that cycle .

therefore , Don't move the code when it runs .

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