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How to compare files from two different branches in Git

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Overview

The git diff command is used to perform the diff functionThe diff function computes the difference between pairs of consecutive elements of a numeric vector on Git data sources. For example, commits, branches, files, and so on. It can also be used to compare two files of different branches.

Example 1

The command below can be used to compare files of different branches.

git diff my_master master -- js/test.js
Compare files from two different branches

Explanation

The code above will show the difference between the test.js files in the my_master and the master branch. The -- command denotes the end of command-line flags. This is optional unless Git gets confused if the argument refers to a commit or a file.

Example 2

If we want to compare the test.js file from the current branch to the other branch then the current branch name can be skipped by adding ...

git diff ..my_master -- js/test.js
Compare file of current branch with another branch

Explanation

The code above will show the difference between the test.js files in the current branch and the master branch.

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