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b0rk: “debugging strategy: jump into a REPL” / Twitter

Posted by jpluimers on 2025/05/28

[Wayback/Archive] 🔎Julia Evans🔍 on Twitter: “debugging strategy: jump into a REPL” (more platforms in the replies to the Tweet)

title: jump into a REPL In dynamic languages (like Python / Ruby / JS), you can jump into an interactive console at any point in your code. Here's how to do it in a frontend Javascript program: 1. edit your code code: ``` my_var = call_some_function() debugger; ``` 2. refresh the page 3. play around in the developer tools console! you can call any function you want / try out fixes! How to do it in other languages: Ruby: `binding.pry` Python: `import pdb; pdb.set_trace()` 

title: jump into a REPL

In dynamic languages (like Python / Ruby / JS), you can jump into an interactive console at any point in your code. Here's how to do it in a frontend Javascript program:

1. edit your code

code:
```
my_var = call_some_function()
debugger;
```

2. refresh the page
3. play around in the developer tools console! you can call any function you want / try out fixes!

How to do it in other languages:

Ruby: `binding.pry`
Python: `import pdb; pdb.set_trace()`

--jeroen

This entry was posted on 2025/05/28 at 12:00 and is filed under Debugging, Development, Software Development. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

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