.NET/Java PDF, Tiff, Barcode SDK Library

Using these new operators given, for example, an unbounded stream of random numbers you can extract the first three even numbers and return a pair of those numbers and their square in reverse order, as the following example shows: let rand = SystemRandom() let numbers = seq { while true do yield randNext(1000) } numbers |> |> |> |> Seqfilter (fun i -> i % 2 = 0) Seqtruncate 3 sortBy revOrder Seqmap (fun i -> i, i*i) // "where".

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public Datum toDatum(Connection c) throws SQLException { return _array.toDatum(c, _SQL_NAME); } /* ORADataFactory interface */ public ORAData create(Datum d, int sqlType) throws SQLException { if (d == null) return null; AddressList a = new AddressList(); a._array = new MutableArray(2002, (ARRAY) d, Address.getORADataFactory()); return a; } public int length() throws SQLException { return _array.length(); } public int getBaseType() throws SQLException { return _array.getBaseType(); } public String getBaseTypeName() throws SQLException { return _array.getBaseTypeName(); } public ArrayDescriptor getDescriptor() throws SQLException { return _array.getDescriptor(); } /* array accessor methods */ public Address[] getArray() throws SQLException { return (Address[]) _array.getObjectArray( new Address[_array.length()]); } public Address[] getArray(long index, int count) throws SQLException { return (Address[]) _array.getObjectArray(index, new Address[_array.sliceLength(index, count)]); } public void setArray(Address[] a) throws SQLException { _array.setObjectArray(a); } public void setArray(Address[] a, long index) throws SQLException {

// "select"

In 2.0, however, you can use a transacted hash table that would automatically participate in the transaction present. Furthermore, if on another path of code dynamically composing a different transaction, you start again by modifying the hash table but then modify a file from the hard drive, the transaction will automatically be promoted to enlist the file-based transaction manager. If your code continues and uses ADO.NET to modify a database table, the transaction is promoted again, to one that can handle the database transaction. Notice at this point in the scenario you have enlisted a transaction manager that is much more of an expensive resource than one that simply manages the memory consumed by a hash table. You have done so only on an as-needed basis, however. If your process continues and modifies a table from a different database, then and only then is the DTC enlisted to manage the distributed transaction. This is a far superior model to the one available in 1.x of the .NET Framework. You can dynamically compose your transactions, and the DTC will not be involved until you need for it to be. In fact, only the resource managers that need be involved will be, giving you a much better cost-to-feature ratio than was available in 1.x. The volatile management of memory and the file system is provided to you by the Lightweight Transaction Manager (LTM), which we look at next.

_array.setObjectArray(a, index); } public Address getElement(long index) throws SQLException { return (Address) _array.getObjectElement(index); } public void setElement(Address a, long index) throws SQLException { _array.setObjectElement(a, index); } }

// random results will vary! val it : seq<int * int> = seq [(814, 662596); (686, 470596); (242, 58564)]

There are two options to select a collection and its member elements when using JPublishergenerated custom classes: Select the collection as an ARRAY object and members as custom class objects. In the context of our example, this would imply that we would materialize the collection as an ARRAY object whose members are of class Address. Select the collection and members as custom class objects. In the context of our example, this would imply that we would materialize the collection as an AddressList object whose members consist of Address objects. The following DemoCollectionAsCustomObjects class demonstrates both options. In addition, it demonstrates how we can add an element to the collection. We begin with the import statements and obtain the connection in the main() method: /** This program demonstrates how to select a collection of objects * using custom collection classes. It also demonstrates how to modify * an existing collection object. * COMPATIBLITY NOTE: * runs successfully against 9.2.0.1.0 and 10.1.0.2.0 */ import java.util.Map; import java.sql.SQLException; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; import oracle.jdbc.OracleResultSet; import oracle.sql.ARRAY; import book.util.JDBCUtil; import book.util.Util; import book.ch11.jpub.Address; import book.ch11.jpub.AddressList; class DemoCollectionAsCustomObjects {