Have you learned all these routines to solve bugs?

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Hello everyone , I'm fish skin .

In the process of learning programming , We will encounter all kinds of Bug, I often feel bald because of them .

But as you continue to solve Bug、 Accumulate experience , You'll find that it actually solves Bug There are also routines .

Today, I'd like to share the solutions summarized by fish skin Bug tricks , Help everyone improve the efficiency of programming learning , Protect your hair .

solve Bug Routine summary

Outline of this article ：

Fish skin - solve Bug Routine summary

preparation

Actually change Bug The process is the same as solving a case .

First , In a hurry to search for questions 、 Change the handwritten code on Bug Before , Do a few things first .

1. Get more information

It's like looking for witnesses at the crime scene 、 Like collecting evidence .

We need to find out Bug When does it happen ？ Why does it happen ？ Under what circumstances ？

What exactly did the user do , That led to Bug ？

It happens every time Bug, Or a little back trigger , If it is triggered by accident , Is it reproducible ？

Not reproducible Bug, Also called Bug Well ？

This information , It's all important . If you can , You'd better get the user's detailed error reporting reasons 、 Requests and responses , More information , To help us locate and analyze problems more accurately .

2. Define the boundaries

To put it bluntly , Is through the information already in hand , Make sure you put this Bug On whose head ？

for instance , If users suddenly can't visit your website . At this time, don't put that silly analysis and investigation first , But you can visit the website first . If you can visit , Maybe not at all Bug, But the user's own network cable is broken ！

In enterprise development, many people often cooperate , For example, front end and back end 、 Service providers and service callers , How to judge who wrote it Bug Well ？

Generally, we can go through Interface Request parameters and response parameters to divide responsibilities .

For example, I'm the front end , Request your back-end interface , Send you " Fish skin ", You must return to me " dog's head ". The result finally appears Bug when , I have a look at , I sent you " Fish skin ", You gave me " Fish head " Right , That's obviously on your side Bug, Rain I have no melon .

3. Protection site

Make sure it's your own Bug after , If it's an online program Bug, Remember to keep the program state at that time , such as dump Memory 、 Download logs , For later troubleshooting .

Just like solving a case , Don't touch anything at the crime scene , Otherwise, key information may be missing .

Let's see how to solve Bug.

Take care of yourself

Everyone's time is precious , When something goes wrong , It is suggested not to ask others blindly , It's self-reliance , You can solve it yourself in the following ways .

1. self-examination

Except for problems in the program , The most direct way to check is ： Error reporting of the program 、 Analyze the logged error log .

For example, when you see an error in the program "db connection timeout", Obviously, the database connection timed out , At this time, you can first confirm whether there is a problem with the network and database itself , Maybe it can be solved Bug 了 .

2. Search engine

As the saying goes , Never ask a certain degree in case of trouble , This is probably the most common solution Bug Means .

But today's search engines are not very friendly to programmers , Many advertisements 、 The content is outdated 、 After clicking in, it's not right , These will become obstacles to your search .

Then you might as well try these skills ：

Screened ads

Add... After the search term "-advertisement" Can quickly block the search advertising information ：

On-site search

Use site: domain name + Search terms , You can quickly search in a specific website , Like most now Bug The solutions are actually CSDN：

Keyword search

When using a certain degree to search for long sentences , You can disassemble the keywords in the error message , Such as version number 、 Database type, etc , Use spaces to connect and overlay keywords , You can search the desired results more accurately , Avoid the interference of conjunctions .

Limit the scope

Open the search tool , You can add restrictions to the search , Such as time 、 Document type, etc ：

Of course , Other search engines also have their own search skills , Be the same in essentials while differing in minor points .

Besides , You can also try Developer search , A search engine for programmers , Much purer . And it seems that its implementation is very simple , Just search for content from developer related websites .

Developer search

3. Official documents

When we use some unpopular technology or newer technology , It may be difficult for domestic search engines to find a solution .

At this time, you might as well open the official document , Directly search for the part related to your problem , Read it carefully , You may find that your syntax or parameters are wrong ？

Search for content in official documents

Actually , quite a lot Bug It's because you don't read the document carefully ！

For component libraries 、SDK、 Class library 、 plug-in unit 、API Use , I actually prefer to read official documents , More direct , Pierce to the heart of the matter .

4. Github

If you're using an open source project , Then try in the project warehouse issues Search for answers in , Especially famous projects , A lot of people use it , What you met Bug Maybe others have met .

Search for Bug

If there is a solution, you can directly copy , Even if there is no solution , You can also try to contact and encounter similar Bug Classmate , Explore together .

5. Trace source code

In addition to dependency conflicts 、 Technical problems such as memory overflow Bug, In fact, our work is more about repairing business logic Bug. For example, make a payment function , user A Buckle the money , But there was no reaction .

Then don't bother searching online in this case , Because everyone writes different business code , multifarious . Why don't you start at the entrance of the program , use Debug Make some breakpoints 、 Print some variable information , Just debug slowly line by line .

Break point debugging

If you suspect that something is wrong with a dependent class or method , You can also directly click in to view its source code and comments .

Ask for help

If you can't solve the problem yourself , We can only turn to others for help .

Questioning skills

Asking questions is also skillful , Want to be faster 、 Get answers more accurately , Just put your problem 、 scene 、 Ins and outs 、 Key information is provided clearly , It can also be used PasteBin Tools like sharing code , Let others better understand .

For example, I receive hundreds of private letters and questions every day , Many of them can't even describe what they want to ask , such as ： Why is my website inaccessible ？

How can I help you solve this problem ？ Isn't this a waste of each other's time ？

So I suggest you read 《 The wisdom of asking questions 》 This free little book , Teach you to be an intelligent questioner .

Address ：https://github.com/tvvocold/How-To-Ask-Questions-The-Smart-Way

The way

After thinking about what to ask , Ask who ？

The first is the two platforms ： The domestic CSDN Relatively suitable for beginners ; foreign Stack Overflow , More active 、 There will be more answers .

Stack Overflow

If it's an open source project , You can consider GitHub Put forward a new one under the project warehouse Issues , Aite team officials to solve .

If you use class libraries and services provided by others , The maintainer of the project can be found in the official documentation , Contact them and give feedback .

Besides , You can also add some professional friends 、 Add some programming communication teams and so on , It's all good .

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Last , If none of the above methods can solve Bug, Then you might as well try ： restart ！

Restart Dafa ,Bug Can't escape . Restart is not enough , Then uninstall and reinstall ~

That's what we're sharing , I'm fish skin , Ask a give the thumbs-up , This will be the biggest driving force for my continuous creation , thank you