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package u
func First[T any](v []T) (T, bool) {
if len(v) == 0 {
var zero T
return zero, false
}
return v[0], true
}
func ChunkBy[T any](items []T, chunkSize int) [][]T {
var chunks = make([][]T, 0, (len(items)/chunkSize)+1)
for chunkSize < len(items) {
items, chunks = items[chunkSize:], append(chunks, items[0:chunkSize:chunkSize])
}
return append(chunks, items)
}
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