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3617c2de8f
Document that Last panics on empty slices with a clear error message. Add examples for single element and empty slice cases. Related to Issue 13 (PR #41) 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
1,002 B
1,002 B
| title | date |
|---|---|
| Tap | 2025-01-16T00:00:00-00:00 |
Tap applies a function to each element for side effects (like debugging or logging) and returns the original slice unchanged. Useful for debugging pipelines without breaking the flow.
package main
import (
"fmt"
u "github.com/rjNemo/underscore"
)
func main() {
// Debugging a pipeline
nums := []int{1, 2, 3, 4, 5}
result := u.Tap(
u.Map(
u.Filter(nums, func(n int) bool { return n%2 == 0 }),
func(n int) int { return n * 2 },
),
func(n int) {
fmt.Printf("Debug: %d\n", n) // Prints each value
},
)
fmt.Println(result) // [4, 8]
// Counting elements that pass through
count := 0
filtered := u.Tap(
u.Filter(nums, func(n int) bool { return n > 2 }),
func(n int) { count++ },
)
fmt.Printf("Found %d elements: %v\n", count, filtered)
// Found 3 elements: [3 4 5]
// Logging transformations
data := []string{"hello", "world"}
u.Tap(data, func(s string) {
fmt.Printf("Processing: %s\n", s)
})
}