How to downgrade Golang from version 1.13 to 1.12

I've been studying Go recently and found that the differences between versions are quite significant. Here, I'll share how to downgrade Go; this method has broad applicability:

Step 1: Confirm your version

~|⇒ go version go version go1.13.4 darwin/amd64

Step 2: Install the version you need.

brew install go@1.12

Step 3: unlink

~|⇒ brew unlink go Unlinking /usr/local/Cellar/go/1.13.4... 3 symlinks removed

Step 4: Force link

~|⇒ brew link --force go@1.12 Linking /usr/local/Cellar/go@1.12/1.12.9... 3 symlinks created

After completing the above steps, you can check the version again. The downgrade should be successful. At this point, please clear your cache, especially the dependencies; clear the cache and download again. If using GoLand, remember to select the newer version.