15 Archived Topics
Remove Filter  | This article shows you how to optimize memory allocations in C++ using placement new. Applicable especially to usecases dealing with creation of large number of objects. [COLOR="Red"][B]A brief on problem:[/B][/COLOR] Lets take example problem for simplicity: - I have a GSM network with a cell in it. - Cell's coverage … |
| | Hi, I have a problem where I need to generate hash for ~10e9 (1 bio) keys. I tried creating a hash of my own but after all the research I realized that I can as well (or even should) use one of existing functions. I narrowed down on SHA-1, which … |
| | Referring to teh [URL="http://www.daniweb.com/techtalkforums/announcement55-4.html"]announcement: [/URL]What are teh possible values for syntax in code tags? I just posted some shell script and code=sh or code=shell didn't seem to work. Would be nice if the announcement itself can be updated with this info a link to this info is added there... |
| | Hi, I was implementing the Exampler / Prototype pattern just to brush up on C++. Couldn't figure out how to do the cleanup at the end. Problem is deleting all the prototypes from the map in base class at the end. I.e. deleting all stored pointers in [ICODE]Animal::examplesPtr[/ICODE], which is … |
| | Hi, I want to get the count(*) from all tables under a schema. How to can do this using a loop? I'm a noob at PL/SQL. I'm unable to find how to use the loop variable in the select statement. Here is what I've tried so far: [CODE]spool $DD/get_oid_dump.log; SET … |
| | While trying to address a new requirement we wanted to provide a generic soln and pass on our pain to the customer. :) [B]Application: [/B]Say I have some application listening to a port or JMS or something where it receives some encrypted messages/requests. To process the requests it need to …  |
| | Hi, While trying to debug some performance issues, we narrowed down the problem to calls to Entity Beans taking long time. Original design is nice and generic but does not scale up in this case. Here are the details: - J2EE application. - Oracle DB - Entity Beans used for …  |
| | ------------------------------------------------------------ [COLOR=Blue][B]Intro:[/B][/COLOR] This is a small program that measures the performance of given java classes. In snippet there are 2 classes: 1. TestClass.java contains all java classes that are being measured for performance, I've picked up Narue's Sorting Algorithms as AUT (application under test) 2. AJPerf.java: contains the aspect that … |
| | Hi *, Here is a small program I had created to search for a given .class file within given CLASSPATH. It is primarily used in our project on test machines where lotsa ppl put lotsa patches in lotsa paths/jars and finally end up wondering which class file is being used. … |
| | Hello Everyone, Does anyone know any design patterns for modules meant for encoding/decoding of protocol messages. E.g. BSSMAP/LAP... We need to write encoders and decoders for BSSMAP and BSSLAP messages for our product. All the IE (information elements) are defined by standards, so we know everything abt every field in …  |
| | I needed to get links to some good Java, J2EE tutorials and was surprised that daniweb::Java didn't have a thread on that.. Of course it's easy enough having Sun provide tutorials on most things, there might be some covering specific topics in better ways. Anyway here are the links I …  |
| | Does the binary of JVM (e.g. java.exe) provide an option to work in a backward compatible mode? My problem is I have JRE 1.6.0_01 installed on my machine and I have an application that requires JRE 1.4.2_XX. I don't want to install JRE 1.4.2 only for this one application. PS: … |
| | Hi Guys, I was just reading up Lippman to learn more C++ and came across the third syntax of new operator called "placement new". I have a specific problem where I thot I'll use it, but it turns out to be a total fiasco. :). My requirement is: I need … |
| | Hello *, I was writing an assert() stmt when I realized the following (see code). Can anyone explain why/how. My final aim is to be able to write an assert stmt for verifying that my function (a demo function) works fine. I heard from someone that there are special assert-macros/comparision-operators … |
| | Hello Everyone, Does anyone know any design patterns for modules meant for encoding/decoding of protocol messages. E.g. BSSMAP/LAP... We need to write encoders and decoders for BSSMAP and BSSLAP messages for our product. All the IE (information elements) are defined by standards, so we know everything abt every field in … |
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