kotlin-stdlib/kotlin.collections/allDistinct

allDistinct

fun <T> Array<out T>.allDistinct(): Boolean(source)

Returns true if all elements in the array are distinct from each other, that is, no two elements are equal.

Returns true for an empty array.

The elements are compared using structural equality (==). The operation returns false as soon as a duplicate element is found.

For elements of floating-point types (Double, Float), NaN is considered equal to NaN, and -0.0 is considered not equal to 0.0, consistent with Double.equals and Float.equals.

Since Kotlin

2.4

Samples


fun main() { 
   //sampleStart 
   println(arrayOf<String>().allDistinct()) // true
println(arrayOf("apple").allDistinct()) // true

val distinctValues = arrayOf("apple", "mango", "peach")
println(distinctValues.allDistinct()) // true

val duplicateValues = arrayOf("apple", "mango", "apple")
println(duplicateValues.allDistinct()) // false 
   //sampleEnd
}

@ExperimentalStdlibApi

fun ByteArray.allDistinct(): Boolean(source)

Returns true if all elements in the array are distinct from each other, that is, no two elements are equal.

Returns true for an empty array.

The elements are compared using structural equality (==). The operation returns false as soon as a duplicate element is found.

Since Kotlin

2.4

Samples


fun main() { 
   //sampleStart 
   println(byteArrayOf().allDistinct()) // true
println(byteArrayOf(1).allDistinct()) // true

val distinctValues = byteArrayOf(1, 2, 3)
println(distinctValues.allDistinct()) // true

val duplicateValues = byteArrayOf(1, 2, 1)
println(duplicateValues.allDistinct()) // false 
   //sampleEnd
}

@ExperimentalStdlibApi

fun ShortArray.allDistinct(): Boolean(source)

Returns true if all elements in the array are distinct from each other, that is, no two elements are equal.

Returns true for an empty array.

The elements are compared using structural equality (==). The operation returns false as soon as a duplicate element is found.

Since Kotlin

2.4

Samples


fun main() { 
   //sampleStart 
   println(shortArrayOf().allDistinct()) // true
println(shortArrayOf(1).allDistinct()) // true

val distinctValues = shortArrayOf(1, 2, 3)
println(distinctValues.allDistinct()) // true

val duplicateValues = shortArrayOf(1, 2, 1)
println(duplicateValues.allDistinct()) // false 
   //sampleEnd
}

@ExperimentalStdlibApi

fun IntArray.allDistinct(): Boolean(source)

Returns true if all elements in the array are distinct from each other, that is, no two elements are equal.

Returns true for an empty array.

The elements are compared using structural equality (==). The operation returns false as soon as a duplicate element is found.

Since Kotlin

2.4

Samples


fun main() { 
   //sampleStart 
   println(intArrayOf().allDistinct()) // true
println(intArrayOf(1).allDistinct()) // true

val distinctValues = intArrayOf(1, 2, 3)
println(distinctValues.allDistinct()) // true

val duplicateValues = intArrayOf(1, 2, 1)
println(duplicateValues.allDistinct()) // false 
   //sampleEnd
}

@ExperimentalStdlibApi

fun LongArray.allDistinct(): Boolean(source)

Returns true if all elements in the array are distinct from each other, that is, no two elements are equal.

Returns true for an empty array.

The elements are compared using structural equality (==). The operation returns false as soon as a duplicate element is found.

Since Kotlin

2.4

Samples


fun main() { 
   //sampleStart 
   println(longArrayOf().allDistinct()) // true
println(longArrayOf(1L).allDistinct()) // true

val distinctValues = longArrayOf(1L, 2L, 3L)
println(distinctValues.allDistinct()) // true

val duplicateValues = longArrayOf(1L, 2L, 1L)
println(duplicateValues.allDistinct()) // false 
   //sampleEnd
}

@ExperimentalStdlibApi

fun FloatArray.allDistinct(): Boolean(source)

Returns true if all elements in the array are distinct from each other, that is, no two elements are equal.

Returns true for an empty array.

The elements are compared using equality semantics consistent with Float.equals. The operation returns false as soon as a duplicate element is found.

NaN is considered equal to NaN, and -0.0 is considered not equal to 0.0, consistent with Float.equals.

Since Kotlin

2.4

Samples


fun main() { 
   //sampleStart 
   println(floatArrayOf().allDistinct()) // true
println(floatArrayOf(1.0f).allDistinct()) // true

val distinctValues = floatArrayOf(1.0f, 2.0f, 3.0f)
println(distinctValues.allDistinct()) // true

val duplicateValues = floatArrayOf(1.0f, 2.0f, 1.0f)
println(duplicateValues.allDistinct()) // false

println(floatArrayOf(Float.NaN, Float.NaN).allDistinct()) // false
println(floatArrayOf(0.0f, -0.0f).allDistinct()) // true 
   //sampleEnd
}

@ExperimentalStdlibApi

fun DoubleArray.allDistinct(): Boolean(source)

Returns true if all elements in the array are distinct from each other, that is, no two elements are equal.

Returns true for an empty array.

The elements are compared using equality semantics consistent with Double.equals. The operation returns false as soon as a duplicate element is found.

NaN is considered equal to NaN, and -0.0 is considered not equal to 0.0, consistent with Double.equals.

Since Kotlin

2.4

Samples


fun main() { 
   //sampleStart 
   println(doubleArrayOf().allDistinct()) // true
println(doubleArrayOf(1.0).allDistinct()) // true

val distinctValues = doubleArrayOf(1.0, 2.0, 3.0)
println(distinctValues.allDistinct()) // true

val duplicateValues = doubleArrayOf(1.0, 2.0, 1.0)
println(duplicateValues.allDistinct()) // false

println(doubleArrayOf(Double.NaN, Double.NaN).allDistinct()) // false
println(doubleArrayOf(0.0, -0.0).allDistinct()) // true 
   //sampleEnd
}

@ExperimentalStdlibApi

fun BooleanArray.allDistinct(): Boolean(source)

Returns true if all elements in the array are distinct from each other, that is, no two elements are equal.

Returns true for an empty array.

The elements are compared using structural equality (==). The operation returns false as soon as a duplicate element is found.

Since Kotlin

2.4

Samples


fun main() { 
   //sampleStart 
   println(booleanArrayOf().allDistinct()) // true
println(booleanArrayOf(true).allDistinct()) // true

val distinctValues = booleanArrayOf(true, false)
println(distinctValues.allDistinct()) // true

val duplicateValues = booleanArrayOf(true, false, true)
println(duplicateValues.allDistinct()) // false 
   //sampleEnd
}

@ExperimentalStdlibApi

fun CharArray.allDistinct(): Boolean(source)

Returns true if all elements in the array are distinct from each other, that is, no two elements are equal.

Returns true for an empty array.

The elements are compared using structural equality (==). The operation returns false as soon as a duplicate element is found.

Since Kotlin

2.4

Samples


fun main() { 
   //sampleStart 
   println(charArrayOf().allDistinct()) // true
println(charArrayOf('a').allDistinct()) // true

val distinctValues = charArrayOf('a', 'b', 'c')
println(distinctValues.allDistinct()) // true

val duplicateValues = charArrayOf('a', 'b', 'a')
println(duplicateValues.allDistinct()) // false 
   //sampleEnd
}

@ExperimentalStdlibApi

fun <T> Iterable<T>.allDistinct(): Boolean(source)

Returns true if all elements in the collection are distinct from each other, that is, no two elements are equal.

Returns true for an empty collection.

The elements are compared using structural equality (==). The operation returns false as soon as a duplicate element is found.

For elements of floating-point types (Double, Float), NaN is considered equal to NaN, and -0.0 is considered not equal to 0.0, consistent with Double.equals and Float.equals.

Since Kotlin

2.4

Samples


fun main() { 
   //sampleStart 
   println(listOf<String>().allDistinct()) // true
println(listOf("apple").allDistinct()) // true

val distinctValues = listOf("apple", "mango", "peach")
println(distinctValues.allDistinct()) // true

val duplicateValues = listOf("apple", "mango", "apple")
println(duplicateValues.allDistinct()) // false 
   //sampleEnd
}

@ExperimentalStdlibApi

@ExperimentalUnsignedTypes

fun UIntArray.allDistinct(): Boolean(source)

Returns true if all elements in the array are distinct from each other, that is, no two elements are equal.

Returns true for an empty array.

The elements are compared using structural equality (==). The operation returns false as soon as a duplicate element is found.

Since Kotlin

2.4

Samples


fun main() { 
   //sampleStart 
   println(uintArrayOf().allDistinct()) // true
println(uintArrayOf(1u).allDistinct()) // true

val distinctValues = uintArrayOf(1u, 2u, 3u)
println(distinctValues.allDistinct()) // true

val duplicateValues = uintArrayOf(1u, 2u, 1u)
println(duplicateValues.allDistinct()) // false 
   //sampleEnd
}

@ExperimentalStdlibApi

@ExperimentalUnsignedTypes

fun ULongArray.allDistinct(): Boolean(source)

Returns true if all elements in the array are distinct from each other, that is, no two elements are equal.

Returns true for an empty array.

The elements are compared using structural equality (==). The operation returns false as soon as a duplicate element is found.

Since Kotlin

2.4

Samples


fun main() { 
   //sampleStart 
   println(ulongArrayOf().allDistinct()) // true
println(ulongArrayOf(1uL).allDistinct()) // true

val distinctValues = ulongArrayOf(1uL, 2uL, 3uL)
println(distinctValues.allDistinct()) // true

val duplicateValues = ulongArrayOf(1uL, 2uL, 1uL)
println(duplicateValues.allDistinct()) // false 
   //sampleEnd
}

@ExperimentalStdlibApi

@ExperimentalUnsignedTypes

fun UByteArray.allDistinct(): Boolean(source)

Returns true if all elements in the array are distinct from each other, that is, no two elements are equal.

Returns true for an empty array.

The elements are compared using structural equality (==). The operation returns false as soon as a duplicate element is found.

Since Kotlin

2.4

Samples


fun main() { 
   //sampleStart 
   println(ubyteArrayOf().allDistinct()) // true
println(ubyteArrayOf(1u).allDistinct()) // true

val distinctValues = ubyteArrayOf(1u, 2u, 3u)
println(distinctValues.allDistinct()) // true

val duplicateValues = ubyteArrayOf(1u, 2u, 1u)
println(duplicateValues.allDistinct()) // false 
   //sampleEnd
}

@ExperimentalStdlibApi

@ExperimentalUnsignedTypes

fun UShortArray.allDistinct(): Boolean(source)

Returns true if all elements in the array are distinct from each other, that is, no two elements are equal.

Returns true for an empty array.

The elements are compared using structural equality (==). The operation returns false as soon as a duplicate element is found.

Since Kotlin

2.4

Samples


fun main() { 
   //sampleStart 
   println(ushortArrayOf().allDistinct()) // true
println(ushortArrayOf(1u).allDistinct()) // true

val distinctValues = ushortArrayOf(1u, 2u, 3u)
println(distinctValues.allDistinct()) // true

val duplicateValues = ushortArrayOf(1u, 2u, 1u)
println(duplicateValues.allDistinct()) // false 
   //sampleEnd
}

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