59 lines
1.9 KiB
Kotlin
59 lines
1.9 KiB
Kotlin
/*
|
|
* Copyright 2023 dorkbox, llc
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
package dorkbox.collections
|
|
|
|
import java.util.*
|
|
|
|
object Collections {
|
|
/**
|
|
* Gets the version number.
|
|
*/
|
|
const val version = "2.5"
|
|
|
|
init {
|
|
// Add this project to the updates system, which verifies this class + UUID + version information
|
|
dorkbox.updates.Updates.add(java.util.Collections::class.java, "7a4be173d7fd48e4a09543cc572eb903", version)
|
|
}
|
|
|
|
internal val random = Random()
|
|
|
|
/** Returns a random number between 0 (inclusive) and the specified value (inclusive). */
|
|
fun random(range: Int): Int {
|
|
return random.nextInt(range + 1)
|
|
}
|
|
|
|
/** Returns a random number between start (inclusive) and end (inclusive). */
|
|
fun random(start: Int, end: Int): Int {
|
|
return start + random.nextInt(end - start + 1)
|
|
}
|
|
|
|
/**
|
|
* Returns the next power of two. Returns the specified value if the value is already a power of two.
|
|
*/
|
|
fun nextPowerOfTwo(value: Int): Int {
|
|
return 1 shl 32 - Integer.numberOfLeadingZeros(value - 1)
|
|
}
|
|
|
|
/**
|
|
* When true, [Iterable.iterator] for [ObjectMap], and other collections will allocate a new
|
|
* iterator for each invocation.
|
|
*
|
|
* When false, the iterator is reused and nested use will throw an exception. Default is
|
|
* false.
|
|
*/
|
|
var allocateIterators = false
|
|
}
|