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  • Question on Addressing Modes in PDP-11 Assembler

    - by lego69
    I have small question about pdp-11(simulator), I have this command (it begins from the address 1000) add 2500, #2500 and this initial list: register/address - initial value pc 1000 sp 600 2500 3000 and I want to know how this small snippet exactly runs, in my booklet I found that: firstly it reads inforamtion from the address 1000, inside this address we have value 066727, after we read number from the address 1002, AND VALUE MUST BE 2500(because of add 2500, #2500), but in my booklet I have 1474 without any explanations why, I know that I have here relative addressing mode, but why 1474 inside the address 1002 and not 2500, thanks in advance for any help

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  • Data retrieval error in Jquery

    - by Ben
    I'm trying to retrieve data from a php file named return that contains <?php echo 'here is a string'; ?>. I'm doing this through an html file containing ` div { color:blue; } span { color:red; } var x; $.get("return.php", function(data){ x = data; }) function showAlert() {alert(x);} $(document).ready(function(){ alert(x); }); ` When the button is clicked it retrieves and displays the code fine, but on the page loading, it displays "undefined" instead of the data in return.php. Any solutions?

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  • Please Help me add up the elements for this structure in Scheme/Lisp

    - by kunjaan
    I have an input which is of this form: (((lady-in-water . 1.25) (snake . 1.75) (run . 2.25) (just-my-luck . 1.5)) ((lady-in-water . 0.8235294117647058) (snake . 0.5882352941176471) (just-my-luck . 0.8235294117647058)) ((lady-in-water . 0.8888888888888888) (snake . 1.5555555555555554) (just-my-luck . 1.3333333333333333))) (context: the word denotes a movie and the number denotes the weighted rating submitted by the user) I need to add all the quantity and return a list which looks something like this ((lady-in-water 2.5) (snake 2.5) (run 2.25) (just-myluck 2.6)) How do I traverse the list and all the quantities? I am really stumped. Please help me. Thanks.

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  • what do you do while code is compiling

    - by Jacob
    I'm looking for the best idea for what to do while code is compiling or tests are running. Typically around 5 minutes of thumb twiddling. Only so many cups of coffee can be made and drunk in a day, and I don't want to be seen always in the kitchen or bothering other people.

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  • topic-comment naming of functions/methods

    - by Daniel
    I was looking at American Sign Language the other day... and I noticed that the construction of the language was topic-comment. As in "Weather is good". That got me to thinking about why we name methods/functions in the manner of: function getName() { ... } function setName(v) { ... } If we think about naming in a topic-comment function, the function names would be function nameGet() { ... } function nameSet() { ... } This might be better for a class had multiple purposes. IE: class events { function ListAdd(); function ListDelete(); function ListGet(); function EventAdd(); function EventDelete(); function EventGet(); } This way the functions are grouped by "topic". Where as the former naming, functions are grouped Action-Noun, but are sorted by Noun. I thought this was an interesting POV, what do other people think about naming functions/methods Topic-Comment? Obviously, mixing naming conventions up in the same project would be weird, but overall? -daniel

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  • What's a way for a client to automatically resolve the ip address of a server?

    - by zooropa
    The project I am working on is a client/server architecture. In a LAN environment, I want the client's to be able to automatically determine the server's address. I want to avoid having to manually configure each client with the ip address of the server. What is the best way to do this? Some alternatives I have thought about doing are: The server could listen for broadcast packets from the clients. The message from the client would be a request for the IP address of the server. The server would respond with its address. The machine running my project's server could also have a bind server running. The LAN's router could be configured to use it as one of its DNS servers. I think I saw that there is a bind library. Does that mean I can build the bind service into my server so that bind doesn't have to be installed on the server? Any other ideas? What have you done in the past? What are the pros/cons of these approaches and others that might be suggested? Thanks for your help!

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  • XCode and developer tools

    - by Infinity
    Hello guys! I want to use the FileMerge utility on my mac, but it isn't installed. I searched in the google and there is written that it will be installed with the developer tools. So the big question is where can I find the developer tools, because I downloaded the iPhone SDK 3.2 beta 5, and installed it, but I can't found the download location of developer tools. Maybe can you help me?

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  • implementing type inference

    - by deepblue
    well I see some interesting discussions here about static vs. dynamic typing I generally prefer static typing, due to compile type checking, better documented code,etc. However I do agree that they do clutter up the code if done the way Java does it, for example. so Im about to start building a language of my own and type inference is one of the things that I want to implement, in a functional style language... I do understand that it is a big subject, and Im not trying to create something that has not been done before, just basic inferencing... any pointers on what to read up that will help me with this? preferably something more pragmatic/practical as oppose to more theoretical category theory/type theory texts. If there's a implementation discussion text out here, with data structures/algorithms, that would just be lovely much appreciated

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  • Why is Visual Basic bad?

    - by Mike
    Why do programmers consider Visual Basic a bad language? Putting aside any gripes with Microsoft or with proprietary/non-free software in general, and looking the language itself. Syntax, style, etc. I have just started using it, and find the syntax rather terrible. But I'm wondering what are the most common specific problems.

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  • How to replace for-loops with a functional statement in C#?

    - by Lernkurve
    A colleague once said that God is killing a kitten every time I write a for-loop. When asked how to avoid for-loops, his answer was to use a functional language. However, if you are stuck with a non-functional language, say C#, what techniques are there to avoid for-loops or to get rid of them by refactoring? With lambda expressions and LINQ perhaps? If so, how? Questions So the question boils down to: Why are for-loops bad? Or, in what context are for-loops to avoid and why? Can you provide C# code examples of how it looks before, i.e. with a loop, and afterwards without a loop?

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  • unix message queue

    - by Betamoo
    Is there an ipc option to get the last message in message queue but not removing it? I want this to allow many clients reading same messages from the same server.. Thanks

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  • [C#] How to consume web service adheres to the Event-based Asynchronous Pattern?

    - by codemonkie
    I am following the example from http://msdn.microsoft.com/en-us/library/8wy069k1.aspx to consume a web service implemented (by 3rd party) using the Event-based Asynchronous Pattern. However, my program needs to do multiple calls to the DoStuffAsync() hence will get back as many DoStuffCompleted. I chose the overload which takes an extra parameter - Object userState to distinguish them. My first question is: Is it valid to cast a GUID to Object as below, where GUID is used to generate unique taskID? Object userState = Guid.NewGuid(); Secondly, do I need to spawn off a new thread for each DoStuffAsync() call, since I am calling it multiple times? Also, would be nice to have some online examples or tutorials on this subject. (I've been googling for it the whole day and didn't get much back) Many thanks

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  • reassembling http packets with perl and parsing it

    - by johnny2
    I am using net::pcap module to capture packets with this filter: dst $my_host and dst port 80 inside the net::pcap::loop i use the below callback function: net::pcap::loop($pcap_t,-1,\my_callback,'') where my_callback look like this : my_callback { my ($user_data, $header, $packet) = @_; # Strip ethernet IP and TCP my $ether_data = NetPacket::Ethernet::strip($packet); my $ip = NetPacket::IP->decode($ether_data); my $tcp = NetPacket::TCP->decode($ip->{'data'}); } could someone help me how can i assemble the http packets to one packet and extract its header .

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  • What language/compiler for native running of application in any windows platform?

    - by Xinxua
    Hi, I want to develop an application that runs on any windows platform (XP, Vista, 7) but does not require a dependency like .NET Framework or JVM. I have given the other requirements below: Runs in any windows platform Must have GUI libraries to create windows/primitive controls I also want the output file size of the application to be minimal (So cannot include .net frameword etc in the exe file) Any suggestions for this requirement?

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  • How to best convert Flash compatible mp4 files with FFMPEG

    - by Espen Christensen
    I am trying to convert different files to a flash compatible .mp4 file with ffmpeg, but i cant seem to succeed. Off cource the objective is to get the greatest quality with the smallest filesize. So far I have this, that works but it doesnt play in a flash player of some reason, and the result isnt that great, anybody got any tips on how to improve this conversion? ffmpeg -i input.file -f mp4 -vcodec mpeg4 -r 25 -b 560000 -s 610x340 -acodec aac -ac 2 -ab 64 -ar 44100 output.file Would be great the se other peoples experiences with this type of conversion.

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  • How can I demonstrate the benefits of abstractions to an old-time C programmer?

    - by Zaban Khuli
    Hi, there's this senior developer in my company that programs in C. I happen to be from functional background (ML, to be specific). This senior C programmer refuses to use abstractions because "abstraction is for lame programmers and _real_ programmers do not need it." I can not seem to convince him otherwise Is it a problem with only this programmer or do all C (and other lower level language) programmers have this opinion that abstraction is for lame programmers?

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