473,909 Members | 2,700 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

undefined

epots9
1,351 Recognized Expert Top Contributor
i'm just have alittle trouble bypassing some parts of my array that are undefined. Is there an if statement or a method i can use to ignore the undefined slots and focus on the populated slots only?
May 24 '07 #1
1 1109
Logician
210 New Member
i'm just have alittle trouble bypassing some parts of my array that are undefined. Is there an if statement or a method i can use to ignore the undefined slots and focus on the populated slots only?
Expand|Select|Wrap|Line Numbers
  1.  if( myArray[subscript] != undefined )
  2.   { /*do something with the defined element*/ }
May 25 '07 #2

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

Similar topics

2
13136
by: RU | last post by:
Hi, I am working on a porting project to port C/C++ application from unixware C++, AT&T Standard components to g++ with STL on Linux. This application has been working properly on Unixware/C++/AT&T componets environment. I have been able to compile all modules after making necessary changes in LINUX/gcc/STL environment. We have two templates defined XList and XMap.
1
11278
by: Stu | last post by:
I am trying to build the xerces shared library with 2.3.0 version of their source code on an AIX 5.1 32 bit machine with the following version of the g++ compiler /usr/local/bin/g++ -v Reading specs from /usr/local/lib/gcc-lib/powerpc-ibm-aix5.1.0.0/3.3.1/specs Configured with: ../gcc-3.3.1/configure --disable-nls Thread model: aix gcc version 3.3.1
4
6708
by: Mike | last post by:
I am having a problem when a field is spaces being undefined. I wasn't sure if the problem was Excel or Javascript, so I thought I would post here first. The users are able to select from a drop down list either a pre-existing Excel spreadsheet or a blank spreadsheet where they can enter the data. When they click the Store button I am using Javascript to validate the fields. If a particular field is not entered or has invalid data, then...
1
3162
by: Codemutant | last post by:
**** Post for FREE via your newsreader at post.usenet.com **** I just cannot find what is undefined in this code.
1
9629
by: Foolster41 | last post by:
I'm rather new to C++ programing. I'm using the dev-C++ program on a windows XP OS. I'm trying to compile the code for a multi user dungeon (MUD) called circle-mud. When I compile I get the following errors: ---- Compiler: Default compiler Building Makefile: "C:\EvoMud\circle-3.1\src\Makefile.win" Executing make...
13
3102
by: Don Vaillancourt | last post by:
What's going on with Javascript. At the beginning there was the "undefined" value which represented an object which really didn't exist then came the null keyword. But yesterday I stumbled across "null" string. I know that I will get an "undefined" when I try to retrieve something from the DOM which doesn't exist. I have used null myself to initialize or reset variables. But in which
4
4171
by: Chris Beall | last post by:
If you want your code to be bulletproof, do you have to explicitly check for the existence of any possibly-undefined variable? Example: window.outerHeight is defined by some browsers, but not others. It would therefore seem prudent, before using this variable, to do something like: if (typeof (window.outerHeight) != "undefined") { do stuff that refers to this variable } else { work around the fact that the variable isn't defined }
49
14584
by: matty | last post by:
Hi, I recently got very confused (well that's my life) about the "undefined" value. I looked in the FAQ and didn't see anything about it. On http://www.webreference.com/programming/javascript/gr/column9/ they say: <snip> The undefined property A relatively recent addition to JavaScript is the undefined property.
3
789
by: Michael Sgier | last post by:
Hi i get thousands of messages like below. How shall i resolve that? Thanks Mcihael Release/src/Utility/RawImage.o: In function `CMaskImage::CMaskImage(int, int, char const*)': RawImage.cpp:(.text+0x15dc): undefined reference to `popen(PFS*, char const*)'
45
4889
by: VK | last post by:
(see the post by ASM in the original thread; can be seen at <http://groups.google.com/group/comp.lang.javascript/browse_frm/thread/3716384d8bfa1b0b> as an option) As that is not in relevance to "new Array() vs " question or to the array performance, I dared to move it to a new thread. Gecko takes undefined value strictly as per Book 4, Chapter 3, Song 9 of Books of ECMA :-)
0
10921
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 tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth. The Art of Business Website Design Your website is...
1
11052
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
0
10540
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
0
9727
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own.... Now, this would greatly impact the work of software developers. The idea...
1
8099
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules. He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms. Adolph will...
0
5938
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols. I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
0
6140
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
1
4776
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
2
4336
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.

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.