.NET/Java PDF, Tiff, Barcode SDK Library

3 procedure add_dept( 4 p_dept_no in number, 5 p_dept_name in varchar2 ); 6 7 procedure hire_emp( 8 p_empno in number, 9 p_ename in varchar2, 10 p_dept_no in number, 11 p_salary in number, 12 p_job in varchar2 ); 13 14 procedure raise_salary( 15 p_empno in number, 16 p_salary_hike_pcnt in number ); 17 18 procedure fire_emp( 19 p_empno in number ); 20 end manager_pkg; 21 / Package created. We explain each of these procedures in our implementation of the package body. The first procedure, add_dept, simply inserts a department s information into the dept table: db_data_access_layer@ORA10G> create or replace package body manager_pkg 2 as 3 procedure add_dept( 4 p_dept_no in number, 5 p_dept_name in varchar2 ) 6 is 7 begin 8 insert into dept( dept_no, dept_name ) 9 values( p_dept_no, p_dept_name ); 10 end add_dept; The procedure hire_emp simply inserts an employee record into the emp table: 12 13 14 15 16 17 18 19 20 21 22 procedure hire_emp( p_empno in number, p_ename in varchar2, p_dept_no in number, p_salary in number, p_job in varchar2 ) is begin insert into emp( empno, ename, dept_no, salary, job ) values( p_empno, p_ename, p_dept_no, p_salary, p_job ); end hire_emp;

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open List hd (x :: rest) replaced by x concat (map (filter f) inp) replaced by filter f (concat inp) Equations like these can be a source of useful documentation and test cases, and in some situations they can even be used to specify whole programs. Furthermore, good programmers routinely manipulate and optimize programs in ways that effectively assume these transformations are valid. Indeed, if these transformations are not valid, then it is easy to accidentally insert bugs when working with code. That said, many important transformation equations aren t guaranteed to always be valid they typically hold only if additional assumptions are made for example, in the first example the expression rest should not have side effects. Transformational reasoning works well for some kinds of code and badly for others. Table 19-1 lists some of the F# and .NET constructs that are highly compositional and for which transformational reasoning tends to work well in practice.

The procedure raise_salary raises the salary of an employee by a given percentage by performing a simple update: 24 25 26 27 28 29 30 31 32 procedure raise_salary( p_empno in number, p_salary_hike_pcnt in number ) is begin update emp set salary = salary * (p_salary_hike_pcnt/100.00) where empno = p_empno; end raise_salary; Finally, the fire_emp procedure deletes a given employee s record from the emp table: 33 34 procedure fire_emp( 35 p_empno in number ) 36 is 37 begin 38 delete emp 39 where empno = p_empno; 40 end fire_emp; 41 end manager_pkg; 42 / Package body created. Our second (and final) package, clerk_pkg, simply lists the employee and department details with two functions, list_dept_details and list_emp_details, each of which returns a ref cursor containing relevant details: db_data_access_layer@ORA10G> -- create package that reports schema data db_data_access_layer@ORA10G> create or replace package clerk_pkg 2 as 3 function list_dept_details( p_dept_no in number ) 4 return sys_refcursor; 5 function list_emp_details( p_empno in number ) 6 return sys_refcursor; 7 end clerk_pkg; 8 / Package created. db_data_access_layer@ORA10G> create or replace package body clerk_pkg 2 as 3 function list_dept_details( p_dept_no in number ) 4 return sys_refcursor 5 is 6 l_dept_details sys_refcursor; 7 begin 8 open l_dept_details for

Let s start with an interdependent drop-down list example. This page displays two drop-down lists. The first is a list of cities. When the user makes a selection from the list of cities, the second list is populated with a list of pool halls in that city. This is an example of something you can easily do with a postback. For the sake of performance and usability, we ll show you how do it with client-side script instead, eliminating the need for a round trip to the server. This shows how, starting with some static script code that embodies the functionality you want, underlying data can be dynamically generated on the server. You ll start with this simple script, which represents an example of what you want to produce. You ll write code to write this code. You ll use this as a starting point, the same way you d use a wire frame screen shot as a starting point for presentation tier development. You may also want to review the finished product, scripting1.aspx, in the Web04 project, to get an idea of where you re headed. <html> <head> <SCRIPT LANGUAGE="JavaScript"> listsB = new Array; valuesB = new Array; listsB[0] = new Array; listsB[0][0] = "A J Billiard Parlor"; listsB[0][1] = "Campus Room"; listsB[0][2] = "Champion Billiards"; valuesB[0] = new Array; valuesB[0][0] = "33"; valuesB[0][1] = "34"; valuesB[0][2] = "35"; listsB[1] = new Array; listsB[1][0] = "Amsterdam Billiard Club"; listsB[1][1] = "Bernardos Billar and Cafeteria"; listsB[1][2] = "Billiard Club"; listsB[1][3] = "Broadway Billiard Cafe";