How to Split Strings by the First Occurrence of an Element in Go?

Splitting Strings by Only the First Occurrence of an Element in Go

When working with git branch names, it can be necessary to split them to distinguish between the remote and the branch name itself. While splitting by the first slash was initially employed, it proved inadequate due to the potential presence of multiple slashes in branch names.

To address this issue, a cleaner approach is proposed that avoids manual element shifting and re-merging. By leveraging the strings.SplitN function, the problem can be solved concisely and effectively. Here's a modified version of the code:

func ParseBranchname(branchString string) (remote, branchname string) {
    branchArray := strings.SplitN(branchString, "/", 2)
    remote = branchArray[0]
    branchname = branchArray[1]
    return
}

In Go versions 1.18 and above, the use of strings.SplitN can be further simplified:

func ParseBranchname(branchString string) (remote, branchname string) {
    branchArray := strings.Split(branchString, "/", 1)
    remote = branchArray[0]
    branchname = branchString[len(branchArray[0])+1:]
    return
}

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