Packages

 package root
This is the documentation for the Scala standard library.
This is the documentation for the Scala standard library.
Package structure
The scala package contains core types like Int, Float, Array or Option which are accessible in all Scala compilation units without explicit qualification or imports.
Notable packages include:
- scala.collection and its sub-packages contain Scala's collections framework
  - scala.collection.immutable - Immutable, sequential data-structures such as Vector, List, Range, HashMap or HashSet
  - scala.collection.mutable - Mutable, sequential data-structures such as ArrayBuffer, StringBuilder, HashMap or HashSet
  - scala.collection.concurrent - Mutable, concurrent data-structures such as TrieMap
  - scala.collection.parallel.immutable - Immutable, parallel data-structures such as ParVector, ParRange, ParHashMap or ParHashSet
  - scala.collection.parallel.mutable - Mutable, parallel data-structures such as ParArray, ParHashMap, ParTrieMap or ParHashSet
- scala.concurrent - Primitives for concurrent programming such as Futures and Promises
- scala.io - Input and output operations
- scala.math - Basic math functions and additional numeric types like BigInt and BigDecimal
- scala.sys - Interaction with other processes and the operating system
- scala.util.matching - Regular expressions
Other packages exist. See the complete list on the right.
Additional parts of the standard library are shipped as separate libraries. These include:
- scala.reflect - Scala's reflection API (scala-reflect.jar)
- scala.xml - XML parsing, manipulation, and serialization (scala-xml.jar)
- scala.swing - A convenient wrapper around Java's GUI framework called Swing (scala-swing.jar)
- scala.util.parsing - Parser combinators (scala-parser-combinators.jar)
Automatic imports
Identifiers in the scala package and the scala.Predef object are always in scope by default.
Some of these identifiers are type aliases provided as shortcuts to commonly used classes. For example, List is an alias for scala.collection.immutable.List.
Other aliases refer to classes provided by the underlying platform. For example, on the JVM, String is an alias for java.lang.String.
Definition Classes
root
 package scala
Core Scala types.
Core Scala types. They are always available without an explicit import.

Definition Classes
root
 package util

Definition Classes
scala
 package control

Definition Classes
util
 package hashing

Definition Classes
util
ByteswapHashing
Hashing
MurmurHash3
 package matching

Definition Classes
util

scala.util

hashing 

package hashing

Source: package.scala

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 final class ByteswapHashing [T] extends Hashing[T]
A fast multiplicative hash by Phil Bagwell.
 trait Hashing [T] extends Serializable
Hashing is a trait whose instances each represent a strategy for hashing instances of a type.
Hashing is a trait whose instances each represent a strategy for hashing instances of a type.
Hashing's companion object defines a default hashing strategy for all objects - it calls their ## method.
Note: when using a custom Hashing, make sure to use it with the Equiv such that if any two objects are equal, then their hash codes must be equal.

Annotations
@implicitNotFound ( msg = ... )
Since
2.10

Value Members

 def byteswap32(v: Int ): Int
Fast multiplicative hash with a nice distribution.
 def byteswap64(v: Long ): Long
Fast multiplicative hash with a nice distribution for 64-bit values.
 object ByteswapHashing extends Serializable
 object Hashing extends Serializable
 object MurmurHash3 extends MurmurHash3
An implementation of Austin Appleby's MurmurHash 3 algorithm (MurmurHash3_x86_32).
An implementation of Austin Appleby's MurmurHash 3 algorithm (MurmurHash3_x86_32). This object contains methods that hash values of various types as well as means to construct Hashing objects.
This algorithm is designed to generate well-distributed non-cryptographic hashes. It is designed to hash data in 32 bit chunks (ints).
The mix method needs to be called at each step to update the intermediate hash value. For the last chunk to incorporate into the hash mixLast may be used instead, which is slightly faster. Finally finalizeHash needs to be called to compute the final hash value.
This is based on the earlier MurmurHash3 code by Rex Kerr, but the MurmurHash3 algorithm was since changed by its creator Austin Appleby to remedy some weaknesses and improve performance. This represents the latest and supposedly final version of the algorithm (revision 136).

See also
https://github.com/aappleby/smhasher

Packages

Package structure

Automatic imports

hashing 

package hashing

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