The process of examining code changes before they are accepted into a shared codebase.
Code review is the process of examining code changes before they are accepted into a shared codebase.
One or more reviewers inspect the proposed change, ask questions, and check whether it is correct, understandable, safe, and consistent with the project.
Think of code review like checking a teammate’s work before it becomes part of a shared instruction manual.
The reviewer looks for mistakes, unclear steps, and risks while the change is still easy to discuss.
Code review creates a deliberate checkpoint between writing a change and sharing it with the rest of the project.
Spot incorrect behavior, missing cases, and risky changes.
Make code easier for the next person to read and maintain.
Help teammates understand the system and its decisions.
Keep shared code consistent with project standards.
Code review is used wherever multiple people or automated systems contribute to a shared codebase.
Reviewers examine a change before it is merged.
Teams use review to coordinate work from different contributors.
Important changes receive another check before reaching users.
Review helps identify access, data, and dependency risks.
Pull Request: Add input validation + if (!email) return error; + createAccount(email);
A reviewer notices that the code checks whether the value exists but does not verify its format. The contributor updates the change, and the review confirms the behavior before approval.
The review improves the change before it becomes part of the shared codebase.
A change moves through version control, review, and integration before it becomes part of the shared line of work.
People inspect and discuss a proposed code change.
Software runs checks against expected behavior.
Git combines histories so an approved change joins another line of work.
| ENGLISH TERM | 中文 | SIMPLE ENGLISH | 中文小白理解 |
|---|---|---|---|
| Code Review | 代码评审 | Examining code changes before they are accepted. | 在代码改动被接受前检查它。 |
| Pull Request | 拉取请求 | A request to review and integrate proposed changes. | 请求别人检查并合并代码改动。 |
| Commit | 提交 | A saved set of changes in Git. | Git 中保存下来的一组改动。 |
| Branch | 分支 | An independent line of work in a repository. | 仓库中一条独立的工作线路。 |
| Merge | 合并 | Combining changes from different lines of work. | 把不同工作线路的改动合到一起。 |
| Conflict | 冲突 | A situation where changes cannot be combined automatically. | 不同改动无法自动合并的情况。 |
Code review is a quality and collaboration checkpoint that helps a team improve changes before they enter the shared codebase.