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Ruby Tips - How to figure out where a method is defined

The other day when I was dabbling with the huge codebase, I was wondering where a particular method was being declared for a specific method. I wanted to know this because my greps didn't turn out to volatile and didn't return any results



The Solution The Ruby interpreter has certain methods that can be used for identifying under which module or class, the particular method is being defined. See the example below.

So using the .source_location you will be able to figure which file it has been declared.

Solving Error - xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun



If you recently updated to macOS High Sierra and tried to run git commands you would face this error:

xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun

You can do the following to solve this problem:

xcode-select --install 

This will basically install/reinstall the xcode developer tools and your problem will be solved.

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