slices: add a CloneFunc function #58865
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A CloneFunc function solves 2 situations I encounter regularly. 1. Creating a deep copy of a slice Many structs have something like ".Copy" or ".Clone" or ".DeepCopy" to implement a deep copy mechanism. CloneFunc enables using the slices package to make a copy of slices of such structs by leaving the copy implementation up to the caller. 2. Creating a transposition of a slice Often we'll have a struct of one type and wish to create a slice of another type based on the first one. For example, creating a string slice of just the ".Name" field from a slice of complex Person structs. CloneFunc enables the caller to provide just the conversion method when creaing the new slice.
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This PR (HEAD: 08f6c06) has been imported to Gerrit for code review. Please visit https://go-review.googlesource.com/c/go/+/473456 to see it. Tip: You can toggle comments from me using the |
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Message from Gopher Robot: Patch Set 1: Congratulations on opening your first change. Thank you for your contribution! Next steps: Most changes in the Go project go through a few rounds of revision. This can be During May-July and Nov-Jan the Go project is in a code freeze, during which Please don’t reply on this GitHub thread. Visit golang.org/cl/473456. |
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Message from Ian Lance Taylor: Patch Set 1: (1 comment) Please don’t reply on this GitHub thread. Visit golang.org/cl/473456. |
A CloneFunc function solves 2 situations I encounter regularly.
Creating a deep copy of a slice
Many structs have something like ".Copy" or ".Clone" or ".DeepCopy" to implement a deep copy mechanism. CloneFunc enables using the slices package to make a copy of slices of such structs by leaving the copy implementation up to the caller.
Creating a transposition of a slice
Often we'll have a struct of one type and wish to create a slice of another type based on the first one. For example, creating a string slice of just the ".Name" field from a slice of complex Person structs. CloneFunc enables the caller to provide just the conversion method when creating the new slice.