A thread-safe, unseeded fast random number generator.
The implementation relies on ThreadLocalRandom, which can be shared across threads without contention. Java's fancier generators are not used.
This generator cannot be re-seeded (the setSeed method throws UnsupportedOperationException).
Attributes
- Companion
- class
- Source
- FastRandom.scala
- Graph
-
- Supertypes
- Self type
-
FastRandom.type
Members list
Value members
Inherited methods
Returns a LazyList of pseudorandomly chosen alphanumeric characters, equally chosen from A-Z, a-z, and 0-9.
Returns a LazyList of pseudorandomly chosen alphanumeric characters, equally chosen from A-Z, a-z, and 0-9.
Attributes
- Inherited from:
- Random
- Source
- Random.scala
Returns a pseudorandom, uniformly distributed long value between min (inclusive) and the specified value max (exclusive), drawn from this random number generator's sequence.
Returns a pseudorandom, uniformly distributed long value between min (inclusive) and the specified value max (exclusive), drawn from this random number generator's sequence.
Value parameters
- maxExclusive
-
the upper bound (exclusive) of the range, must be greater than
minInclusive - minInclusive
-
the lower bound (inclusive) of the range
Attributes
- Inherited from:
- Random
- Source
- Random.scala
Returns a pseudorandom, uniformly distributed int value between min (inclusive) and the specified value max (exclusive), drawn from this random number generator's sequence.
Returns a pseudorandom, uniformly distributed int value between min (inclusive) and the specified value max (exclusive), drawn from this random number generator's sequence.
Value parameters
- maxExclusive
-
the upper bound (exclusive) of the range, must be greater than
minInclusive - minInclusive
-
the lower bound (inclusive) of the range
Attributes
- Inherited from:
- Random
- Source
- Random.scala
Returns the next pseudorandom, uniformly distributed float value between min (inclusive) and max (exclusive) from this random number generator's sequence.
Returns the next pseudorandom, uniformly distributed float value between min (inclusive) and max (exclusive) from this random number generator's sequence.
Value parameters
- maxExclusive
-
the upper bound (exclusive) of the range, must be greater than
minInclusive - minInclusive
-
the lower bound (inclusive) of the range
Attributes
- Inherited from:
- Random
- Source
- Random.scala
Returns the next pseudorandom, uniformly distributed double value between min (inclusive) and max (exclusive) from this random number generator's sequence.
Returns the next pseudorandom, uniformly distributed double value between min (inclusive) and max (exclusive) from this random number generator's sequence.
Value parameters
- maxExclusive
-
the upper bound (exclusive) of the range, must be greater than
minInclusive - minInclusive
-
the lower bound (inclusive) of the range
Attributes
- Inherited from:
- Random
- Source
- Random.scala
Returns the next pseudorandom, uniformly distributed boolean value from this random number generator's sequence.
Returns the next pseudorandom, uniformly distributed boolean value from this random number generator's sequence.
Attributes
- Inherited from:
- Random
- Source
- Random.scala
Generates n random bytes and returns them in a new array.
Generates n random bytes and returns them in a new array.
Value parameters
- n
-
the number of random bytes to generate
Attributes
- Inherited from:
- Random
- Source
- Random.scala
Generates random bytes and places them into a user-supplied byte array.
Generates random bytes and places them into a user-supplied byte array.
Value parameters
- bytes
-
the byte array to fill with random bytes
Attributes
- Inherited from:
- Random
- Source
- Random.scala
Returns the next pseudorandom, uniformly distributed double value between 0.0 and 1.0 from this random number generator's sequence.
Returns the next pseudorandom, uniformly distributed double value between 0.0 and 1.0 from this random number generator's sequence.
Attributes
- Inherited from:
- Random
- Source
- Random.scala
Returns the next pseudorandom, uniformly distributed float value between 0.0 and 1.0 from this random number generator's sequence.
Returns the next pseudorandom, uniformly distributed float value between 0.0 and 1.0 from this random number generator's sequence.
Attributes
- Inherited from:
- Random
- Source
- Random.scala
Returns the next pseudorandom, Gaussian ("normally") distributed double value with mean 0.0 and standard deviation 1.0 from this random number generator's sequence.
Returns the next pseudorandom, Gaussian ("normally") distributed double value with mean 0.0 and standard deviation 1.0 from this random number generator's sequence.
Attributes
- Inherited from:
- Random
- Source
- Random.scala
Returns a pseudorandom, uniformly distributed int value between 0 (inclusive) and the specified value (exclusive), drawn from this random number generator's sequence.
Returns a pseudorandom, uniformly distributed int value between 0 (inclusive) and the specified value (exclusive), drawn from this random number generator's sequence.
Value parameters
- n
-
the exclusive upper bound for the returned value (0 is the inclusive lower bound), must be positive
Attributes
- Inherited from:
- Random
- Source
- Random.scala
Returns the next pseudorandom, uniformly distributed int value from this random number generator's sequence.
Returns the next pseudorandom, uniformly distributed int value from this random number generator's sequence.
Attributes
- Inherited from:
- Random
- Source
- Random.scala
Returns a pseudorandom, uniformly distributed long value between 0 (inclusive) and the specified value (exclusive), drawn from this random number generator's sequence.
Returns a pseudorandom, uniformly distributed long value between 0 (inclusive) and the specified value (exclusive), drawn from this random number generator's sequence.
Value parameters
- n
-
the exclusive upper bound for the returned value (0 is the inclusive lower bound), must be positive
Attributes
- Inherited from:
- Random
- Source
- Random.scala
Returns the next pseudorandom, uniformly distributed long value from this random number generator's sequence.
Returns the next pseudorandom, uniformly distributed long value from this random number generator's sequence.
Attributes
- Inherited from:
- Random
- Source
- Random.scala
Returns the next pseudorandom, uniformly distributed value from the ASCII range 33-126.
Returns the next pseudorandom, uniformly distributed value from the ASCII range 33-126.
Attributes
- Inherited from:
- Random
- Source
- Random.scala
Returns a pseudorandomly generated String. This routine does not take any measures to preserve the randomness of the distribution in the face of factors like unicode's variable-length encoding, so please don't use this for anything important. It's primarily intended for generating test data.
Returns a pseudorandomly generated String. This routine does not take any measures to preserve the randomness of the distribution in the face of factors like unicode's variable-length encoding, so please don't use this for anything important. It's primarily intended for generating test data.
Value parameters
- length
-
the desired length of the
String
Attributes
- Returns
-
a randomly generated
Stringof the specified length - Inherited from:
- Random
- Source
- Random.scala
Returns a new collection of the same type in a randomly chosen order.
Returns a new collection of the same type in a randomly chosen order.
Type parameters
- C
-
the type of the collection returned, determined by the implicit
BuildFrom - T
-
the element type of the collection
Value parameters
- bf
-
the implicit
BuildFrominstance used to build the result collection - xs
-
the collection to shuffle
Attributes
- Returns
-
the shuffled collection
- Inherited from:
- Random
- Source
- Random.scala
Concrete fields
Interruptible variant, same as the interruptible extension, but cached for performance.
Interruptible variant, same as the interruptible extension, but cached for performance.
Attributes
- Source
- FastRandom.scala
Inherited fields
Attributes
- Inherited from:
- Random
- Source
- Random.scala