473,387 Members | 1,542 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,387 software developers and data experts.

stack

oll3i
679 512MB
Expand|Select|Wrap|Line Numbers
  1. public IAbstractQueryResult pop () {
I want the pop function to return IAbstractQueryResult ?
How do i do that? in
Expand|Select|Wrap|Line Numbers
  1. public class QResStack 
  2.  
ca n i cast the lifo = new Stack(); somehow
Oct 28 '13 #1
1 1318
chaarmann
785 Expert 512MB
Just see if class Stack implements the interface IAbstractQueryResult. If yes, just cast it.
If no, then make your own new class (let's say AbstractQueryStack) that extends Stack and implements IAbstractQueryResult. When you assing lifo= new AbstractQueryStack() then you can cast lifo to IAbstractQueryResult.
Oct 28 '13 #2

Sign in to post your reply or Sign up for a free account.

Similar topics

15
by: Andrew | last post by:
Last night I was reading about implementing my own stack. The example given pushes items on and off the stack at the start and end of each procedure (ie. in a std module). What's not so clear is...
14
by: Kevin Grigorenko | last post by:
Hello, I couldn't find an obvious answer to this in the FAQ. My basic question, is: Is there any difference in allocating on the heap versus the stack? If heap or stack implementation is not...
4
by: Chris Mabee | last post by:
Hello all, and Merry Christmas, I'm having a problem understanding an example of an array based implementation of a stack in a textbook of mine. The code in question is written below. The syntax...
4
by: anonymous | last post by:
Thanks your reply. The article I read is from www.hakin9.org/en/attachments/stackoverflow_en.pdf. And you're right. I don't know it very clearly. And that's why I want to understand it; for it's...
8
by: LedZep | last post by:
What up everyone, I have to write a program that uses a stack to determine whether a string is a palindrome (a string that is spelled identically backward and forward). The program has to...
4
by: alisaee | last post by:
plz check what i have made wrong what is requierd her is to creat class queue and class stack and run the push,pop operation . #include<iostream.h> #include<conio.h> #include<stdio.h> class...
16
by: sarathy | last post by:
Hi all, I need a few clarifications regarding memory allocaion in C++. I apologize for the lengthy explanation. 1. In C++, Objects are allocated in heap. What does heap refer to? Is it an area...
24
by: John | last post by:
I know this is a very fundamental question. I am still quite confused if the program call stack stack should always grows upwards from the bottom, or the opposite, or doesn't matter?? That means...
1
by: alfie27 | last post by:
I currently have a working program that is a stack that stores integers. Now i have to convert it to store strings instead of integers. I have been working on this for hours and just keep getting...
11
by: tom | last post by:
Hi! Im new to Python and doing exercise found from internet. It is supposed to evaluate expression given with postfix operator using Stack() class. class Stack: def __init__(self): self.items...
0
by: taylorcarr | last post by:
A Canon printer is a smart device known for being advanced, efficient, and reliable. It is designed for home, office, and hybrid workspace use and can also be used for a variety of purposes. However,...
0
by: Charles Arthur | last post by:
How do i turn on java script on a villaon, callus and itel keypad mobile phone
0
by: aa123db | last post by:
Variable and constants Use var or let for variables and const fror constants. Var foo ='bar'; Let foo ='bar';const baz ='bar'; Functions function $name$ ($parameters$) { } ...
0
by: ryjfgjl | last post by:
If we have dozens or hundreds of excel to import into the database, if we use the excel import function provided by database editors such as navicat, it will be extremely tedious and time-consuming...
0
by: emmanuelkatto | last post by:
Hi All, I am Emmanuel katto from Uganda. I want to ask what challenges you've faced while migrating a website to cloud. Please let me know. Thanks! Emmanuel
0
BarryA
by: BarryA | last post by:
What are the essential steps and strategies outlined in the Data Structures and Algorithms (DSA) roadmap for aspiring data scientists? How can individuals effectively utilize this roadmap to progress...
1
by: Sonnysonu | last post by:
This is the data of csv file 1 2 3 1 2 3 1 2 3 1 2 3 2 3 2 3 3 the lengths should be different i have to store the data by column-wise with in the specific length. suppose the i have to...
0
by: Hystou | last post by:
There are some requirements for setting up RAID: 1. The motherboard and BIOS support RAID configuration. 2. The motherboard has 2 or more available SATA protocol SSD/HDD slots (including MSATA, M.2...
0
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.