org.jetbrains.kotlin.js.inline.util.collectionUtils.kt Maven / Gradle / Ivy

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/*
 * Copyright 2010-2015 JetBrains s.r.o.
 *
 * 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 org.jetbrains.kotlin.js.inline.util

import java.util.Collections
import java.util.IdentityHashMap

fun  IdentitySet(): MutableSet {
    return Collections.newSetFromMap(IdentityHashMap())
}

fun  Collection.toIdentitySet(): MutableSet {
    val result = IdentitySet()
    for (element in this) {
        result.add(element)
    }

    return result
}

fun  Sequence.toIdentitySet(): MutableSet {
    val result = IdentitySet()
    for (element in this) {
        result.add(element)
    }

    return result
}

fun  Iterable.zipWithDefault(
        other: Iterable,
        defaultT: T
): List> {

    val itT = iterator()
    val itR = other.iterator()

    val result = arrayListOf>()

    while (itT.hasNext() && itR.hasNext()) {
        result.add(itT.next() to itR.next())
    }

    assert(!itT.hasNext()) { "First collection is bigger than second" }

    while (itR.hasNext()) {
        result.add(defaultT to itR.next())
    }

    return result
}