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Ruidy
bcb4dd1e9d
Add comprehensive documentation for all new functions: - TakeWhile: take elements while predicate is true - DropWhile: drop elements while predicate is true - Scan: running accumulator (prefix scan) - First/FirstN: get first element(s) safely - Init: all but last element - Intersperse: insert separator between elements - Sliding: sliding window views - FoldRight: right-to-left fold/reduce - Tap: side effects without mutation - Transpose: flip matrix rows/columns - Unzip: split tuples into separate slices - ParallelReduce: parallel reduction (experimental) - Replicate: create n copies of a value Each doc includes: - Clear description - Code examples with output - Common use cases - Edge case handling 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
901 B
901 B
| title | date |
|---|---|
| Scan | 2025-01-16T00:00:00-00:00 |
Scan is like Reduce but returns all intermediate accumulator values. Also known as prefix scan or cumulative fold. Useful for tracking running totals, running maximums, or other cumulative operations.
package main
import (
"fmt"
u "github.com/rjNemo/underscore"
)
func main() {
// Running sum
nums := []int{1, 2, 3, 4}
add := func(acc, n int) int { return acc + n }
fmt.Println(u.Scan(nums, 0, add)) // [1, 3, 6, 10]
// Running maximum
values := []int{3, 1, 4, 1, 5, 9, 2}
max := func(acc, n int) int {
if n > acc {
return n
}
return acc
}
fmt.Println(u.Scan(values, 0, max)) // [3, 3, 4, 4, 5, 9, 9]
// String concatenation
words := []string{"hello", "world", "!"}
concat := func(acc, s string) string { return acc + s }
fmt.Println(u.Scan(words, "", concat)) // ["hello", "helloworld", "helloworld!"]
}