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package com.carrotsearch.hppc;

import java.util.Deque;
import java.util.Iterator;

import com.carrotsearch.hppc.cursors.FloatCursor;
import com.carrotsearch.hppc.predicates.FloatPredicate;
import com.carrotsearch.hppc.procedures.FloatProcedure;

/**
 * A linear collection that supports element insertion and removal at both ends.
 * 
 * @see Deque
 */
 @com.carrotsearch.hppc.Generated(
    date = "2018-05-21T12:24:05+0200",
    value = "KTypeDeque.java") 
public interface FloatDeque extends FloatCollection {
  /**
   * Removes the first element that equals e.
   * 
   * @return The deleted element's index or -1 if the element
   *         was not found.
   */
  public int removeFirst(float e);

  /**
   * Removes the last element that equals e.
   * 
   * @return The deleted element's index or -1 if the element
   *         was not found.
   */
  public int removeLast(float e);

  /**
   * Inserts the specified element at the front of this deque.
   */
  public void addFirst(float e);

  /**
   * Inserts the specified element at the end of this deque.
   */
  public void addLast(float e);

  /**
   * Retrieves and removes the first element of this deque.
   *
   * @return the head (first) element of this deque.
   */
  public float removeFirst();

  /**
   * Retrieves and removes the last element of this deque.
   *
   * @return the tail of this deque.
   */
  public float removeLast();

  /**
   * Retrieves the first element of this deque but does not remove it.
   *
   * @return the head of this deque.
   */
  public float getFirst();

  /**
   * Retrieves the last element of this deque but does not remove it.
   *
   * @return the head of this deque.
   */
  public float getLast();

  /**
   * @return An iterator over elements in this deque in tail-to-head order.
   */
  public Iterator descendingIterator();

  /**
   * Applies a procedure to all elements in tail-to-head order.
   */
  public  T descendingForEach(T procedure);

  /**
   * Applies a predicate to container elements as long, as the
   * predicate returns true. The iteration is interrupted
   * otherwise.
   */
  public  T descendingForEach(T predicate);
}