How do you debug React Native applications?

Vaibhav Kothia May 26, 2023 0 Comments

There are several ways to debug React Native applications.

1. React Native Debugger: React Native Debugger is a desktop app for inspecting your React Native apps. It provides you with a powerful set of tools to help you debug and optimize your app.

2. React Native Debugger Extension: This is a Chrome browser extension that allows you to debug your React Native app directly from your browser.

3. Remote Debugging: Remote debugging allows you to debug your app on a device or simulator from your development machine.

4. Logging: Logging is a great way to debug your React Native app. You can use the built-in console.log() function to log information about your app.

5. Breakpoints: Breakpoints allow you to pause your app at certain points in the code and inspect the current state of the app. This can be done using the React Native Debugger or the Chrome browser extension.

For example, you can use the React Native Debugger to set a breakpoint in your code and inspect the current state of the application. When the breakpoint is hit, you can inspect the state of your app and see what is causing the issue.

How do you debug a Puppet manifest?

Vaibhav Kothia May 26, 2023 0 Comments

1. Check the syntax:
Run the `puppet parser validate` command to check for syntax errors.

2. Check the logs:
Check the Puppet Agent log files located in `/var/log/puppetlabs/puppet/` for errors.

3. Debug with the `–debug` flag:
Run the `puppet apply –debug` command to show debugging information.

4. Debug with the `–trace` flag:
Run the `puppet apply –trace` command to show debugging information including the stack trace.

5. Debug with the `–test` flag:
Run the `puppet apply –test` command to show debugging information and test the manifest without making any changes.

Example:

$ puppet parser validate /etc/puppet/manifests/site.pp
Syntax OK

$ puppet apply –debug /etc/puppet/manifests/site.pp
Debug: Runtime environment: puppet_version=4.10.12, ruby_version=2.4.4, run_mode=user, default_encoding=UTF-8
Debug: Loading facts
Debug: Loading library ‘puppet/parser/functions/hiera’
Debug: Loading library ‘puppet/parser/functions/include’
Debug: Loading library ‘puppet/parser/functions/concat’
Debug: Loading library ‘puppet/parser/functions/strftime’
Debug: Loading library ‘puppet/parser/functions/file’
Debug: Loading library ‘puppet/parser/functions/inline_template’
Debug: Loading library ‘puppet/parser/functions/generate’
Debug: Loading library ‘puppet/parser/functions/assert_type’
Debug: Loading library ‘puppet/parser/functions/lookup’
Debug: Loading library ‘puppet/parser/functions/each’
Debug: Loading library ‘puppet/parser/functions/template’
Debug: Loading library ‘puppet/parser/functions/with’
Debug: Loading library ‘puppet/parser/functions/dig’
Debug: Loading library ‘puppet/parser/functions/assert_private’
Debug: Loading library ‘puppet/parser/functions/inline_epp’
Debug: Loading library ‘puppet/parser/functions/create_resources’
Debug: Loading library ‘puppet/parser/functions/slice’
Debug: Loading library ‘puppet/parser/functions/assert_structured_data’
Debug: Loading library ‘puppet/parser/functions/each_host_of’
Debug: Loading library ‘puppet/parser/functions/each_key_of’
Debug: Loading library ‘puppet/parser/functions/reduce’
Debug: Loading library ‘puppet/parser/functions/assert_string’
Debug: Loading library ‘puppet/parser/functions/assert_numeric’
Debug: Loading library ‘puppet/parser/functions/assert_boolean’
Debug: Loading library ‘puppet/parser/functions/assert_array’
Debug: Loading library ‘puppet/parser/functions/assert_hash’
Debug: Loading library ‘puppet/parser/functions/assert_scalar’
Debug: Loading library ‘puppet/parser/functions/assert_integer’
Debug: Loading library ‘puppet/parser/functions/assert_regex’
Debug: Loading library ‘puppet/parser/functions/assert_undef’
Debug: Loading library ‘puppet/parser/functions/assert_resource’
Debug: Loading library ‘puppet/parser/functions/each_value_of’
Debug: Loading library ‘puppet/parser/functions/assert_type_or_undef’
Debug: Loading library ‘puppet/parser/functions/assert_key_value’
Debug: Loading library ‘puppet/parser/functions/assert_key’
Debug: Loading library ‘puppet/parser/functions/assert_absolute_path’
Debug: Loading library ‘puppet/parser/functions/assert_sensitive’
Debug: Loading library ‘puppet/parser/functions/assert_non_empty’
Debug: Loading library ‘puppet/parser/functions/assert_optional’
Debug: Loading library ‘puppet/parser/functions/assert_not_empty’
Debug: Loading library ‘puppet/parser/functions/assert_not_undef’