You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: util.go
    path of file: ./repos/ko/vendor/github.com/jmespath/go-jmespath
    
    the code of the file until where you have to start completion: package jmespath

import (
	"errors"
	"reflect"
)

// IsFalse determines if an object is false based on the JMESPath spec.
// JMESPath defines false values to be any of:
// 
    
func capSlice(length int, actual int, step int) int {
	if actual < 0 {
		actual += length
		if actual < 0 {
			if step < 0 {
				actual = -1
			} else {
				actual = 0
			}
		}
	} else if actual >= length {
		if step < 0 {
			actual = length - 1
		} else {
			actual = length
		}
	}
	return actual
}