Hash

Utilities for hashing any value.

Added in 0.1.0

No other changes yet.

from "hash" include Hash

1
2

let hashInstance = Hash.make()
assert Hash.hash(hashInstance, "Hello World") == Hash.hash(hashInstance, "Hello World")

1
2

let hashInstance = Hash.makeSeeded(10)
assert Hash.hash(hashInstance, "Hello World") == Hash.hash(hashInstance, "Hello World")

Types

Type declarations included in the Hash module.

Hash.HashInstance

Added in 0.7.0

No other changes yet.

type HashInstance

Represents a particular hashing instance.

Values

Functions and constants included in the Hash module.

Hash.make

Added in 0.7.0

No other changes yet.

make: () => HashInstance

Produces a generic hash instance using a random seed value.

Returns:

type	description
`HashInstance`	A hashing instance that can be consumed during hashing

Throws:

Failure(String)

If WASI random_get fails

Examples:

1
2

let hashInstance = Hash.make()
assert Hash.hash(hashInstance," Hello World") == Hash.hash(hashInstance, "Hello World)

Hash.makeSeeded

Added in 0.7.0

No other changes yet.

makeSeeded: (seed: Number) => HashInstance

Produces a hashInstance using the given seed.

Parameters:

param	type	description
`seed`	`Number`	The seed to use while hashing

Returns:

type	description
`HashInstance`	A hashing instance that can be consumed during hashing

Examples:

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let hashInstance = Hash.makeSeeded(1)
assert Hash.hash(hashInstance," Hello World") == Hash.hash(hashInstance, "Hello World)

1
2
3

let hashInstance1 = Hash.makeSeeded(1)
let hashInstance2 = Hash.makeSeeded(2)
assert Hash.hash(hashInstance1," Hello World") != Hash.hash(hashInstance2, "Hello World)

Hash.hash

Added in 0.1.0

version	changes
`0.7.0`	Added `hashInstance` parameter instead of using a global seed

hash: (hashInstance: HashInstance, anything: a) => Number

A generic hash function that produces an integer from any value given a hashing instance. If a == b then Hash.hash(h, a) == Hash.hash(h, b).

Parameters:

param	type	description
`hashInstance`	`HashInstance`	The hashing instance to use as a seed
`anything`	`a`	The value to hash

Returns:

type	description
`Number`	A hash for the given value

Examples:

1
2

let hashInstance = Hash.makeSeeded(1)
assert Hash.hash(hashInstance," Hello World") == Hash.hash(hashInstance, "Hello World)