mirror of
https://github.com/rjNemo/underscore
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Ruidy
260c48e051
- Add Init: returns all elements except last, and the last element - Useful for destructuring lists from the right - Comprehensive tests including edge cases - Benchmark included Example: Init([1,2,3,4,5]) → ([1,2,3,4], 5) Resolves Issue 17 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-authored-by: Claude <noreply@anthropic.com>
18 lines
490 B
Go
18 lines
490 B
Go
package underscore
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// Init returns all elements except the last one, and the last element separately.
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// Returns an empty slice and zero value if the input slice is empty.
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// Also known as "uncons from the right" or "snoc" inverse.
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func Init[T any](values []T) ([]T, T) {
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var last T
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if len(values) == 0 {
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return []T{}, last
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}
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if len(values) == 1 {
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return []T{}, values[0]
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}
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res := make([]T, len(values)-1)
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copy(res, values[:len(values)-1])
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return res, values[len(values)-1]
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}
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