Cutover reports the number of failures of IndexByte we should tolerate before switching over to Index.

DedupeWhitespace removes any duplicate whitespace from the string and replaces it with a single space.

Equal reports whether a and b are the same length and contain the same bytes.

HashStrBytes returns the hash and the appropriate multiplicative factor for use in Rabin-Karp algorithm.

IndexRabinKarpBytes uses the Rabin-Karp search algorithm to return the index of the first occurrence of substr in s, or -1 if not present.

IsAlphaNum reports whether the byte is an ASCII letter, number, or underscore.

IsASCIIPrintable checks if s is ascii and printable, aka doesn't include tab, backspace, etc.

IsASCIISpace tests for the most common ASCII whitespace characters: ' ', '\t', '\n', '\f', '\r', '\v' This excludes all Unicode code points above 0x007F.

IsDigitSingleOP uses a single operation instead of the standard a << c && c << b form Another good example: very common thing is if(x >= 1 && x <= 9) which can be done as if( (unsigned)(x-1) <=(unsigned)(9-1)) Changing two conditional tests to one can be a big speed advantage; especially when it allows predicated execution instead of branches.

IsDigitSingleOPCompare is a sample implementation used for benchmarking IsDigitSingleOP.

IsUnicodeWhiteSpaceMap reports whether the rune is any utf8 whitespace character using the broadest and most complete definition.

NewList returns a new List from the given data.

NewSet returns a new Set from the given List.

RuneSample prints a sample of various Unicode runes.

ToString implements Stringer directly as a function call with a parameter instead of a method on that parameter.

'\r'.

'\f'.

'\n'.

x86 values.

'\U0010FFFF' // Maximum valid Unicode code point.

PrimeRK is the prime base used in Rabin-Karp algorithm.

'\uFFFD' // the "error" Rune or "Unicode replacement character".

0x80 // characters below RuneSelf are represented as themselves in a single byte.

'\t'.

4 // maximum number of bytes of a UTF-8 encoded Unicode character.

'\v'.

List is a wrapper around a slice of items.

Any is used to store data when the type cannot be determined ahead of time.