Go has function literals, which are basically lambdas but a bit more verbose. Typical Go style doesn’t use them as often as other languages. You might assign one to a variable, giving you an inner function. But loops are usually written as for loops, not map calls. One API call that comes to mind where you might use one is ast.Inspect. [1]

Go often works well for replacing shell scripts, even without generics.

[1] https://pkg.go.dev/go/ast#Inspect