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  • Newbie Python programmer tangling with Lists.

    - by Sergio Tapia
    Here's what I've got so far: # A. match_ends # Given a list of strings, return the count of the number of # strings where the string length is 2 or more and the first # and last chars of the string are the same. # Note: python does not have a ++ operator, but += works. def match_ends(words): counter = 0 for word in words: if len(word) >= 2 and word[0] == word[-1]: counter += counter return counter # +++your code here+++ return I'm following the Google Python Class, so this isn't homework, but me just learning and improving myself; so please no negative comments about 'not doing my homework'. :P What do you guys think I'm doing wrong here? Here's the result: match_ends X got: 0 expected: 3 X got: 0 expected: 2 X got: 0 expected: 1 I'm really loving Python, so I just know that I'll get better at it. :)

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  • Are there any famous one-man-army programmers?

    - by DFectuoso
    Lately I have been learning of more and more programmers who think that if they were working alone, they would be faster and would deliver more quality. Usually that feeling is attached to a feeling that they do the best programming in their team and at the end of the day the idea is quite plausible. If they ARE doing the best programming, and worked alone (and more maybe) the final result would be a better piece of software. I know this idea would only work if you where enough passionate to work 24/7, on a deadline, and great discipline. So after considering the idea and trying to learn a little more, I wonder if there are famous one-man-army programmers that have delivered any (useful) software in the past?

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  • Young people using Emacs?

    - by bigmonachus
    I am a college student that has fallen in love with Emacs. I have used IDEs in the past, and although features like Intellisense made the switch to Emacs very hard, I now think that Emacs is much more powerful, and features like Intellisense can be pretty closely matched by various modes depending on language (and I am not referring to M-/). I am happily writing Elisp code for everything that I need that isn't provided by modes or by Emacs itself and I love the way that it adapts and molds to my needs. However, I do think that its main disadvantage is the fact that it has a pretty steep learning curve and that most new programmers will not even begin to learn it out of many common misconceptions. So, I want to know the opinions of young people (or any person who didn't start using Emacs before there were IDEs) that are Emacs users. Just to get some reassurance that Emacs is not dead within our Eclipse-loving generation =). (Opinions of users of any other highly extensible editor like Jedit are also welcome)

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  • libpcap IP Packet Reassembly

    - by holydiver
    Hello all, I'm looking for a sample code for IP packet reassembly in C with libpcap*. Is IP packet defragmentation implemented in libpcap library officially? I've found this proposal : http://www.mail-archive.com/[email protected]/msg02991.html[this][1] . Are there any implementation of defragmentation of IP packets. [1]: http://www.mail-archive.com/[email protected]/msg02991.html [+] *The reason for looking for the sample code is just for fun and learning and i don't want to spend too much time for writing code for IP packet reassembly.

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  • When should you NOT use the asterisk (*) when declaring a variable in Objective C

    - by Jason
    I have just started learning objective c and the asterisk is giving me some trouble. As I look through sample code, sometime it is used when declaring a variable and sometimes it is not. What are the "rules" for when it should be used. I thought it had something to do with the data type of the variable. (asterisk needed for object data types, not needed for simple data types like int) However, I have seen object data types such as CGPoint declared without the asterisk as well? Is there a definitive answer or does it have to do with how and what you use the variable for?

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  • Current date in rails form

    - by Dean
    Hi, Im learning rails and exploring a bit away from the book and creating a simple application with added functionality as i increase my knowledge. Im writing a simple blog application and i have a field in the form called date added, i don't want this to be a field i want it to get the date from the server and place it in to the database automatically. How would i go about doing this? I was thinking of a hidden field but then unsure on how to process the date and insert it to the hidden field. Is this the wrong way of going about things? Thanks in Advance, Dean

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  • DataMapper is only returning the last part of this query

    - by Josh K
    So I'm using the following: $r = new Record(); $r->select('ip, count(*) as ipcount'); $r->group_by('ip'); $r->order_by('ipcount', 'desc'); $r->limit(5); $r->get(); foreach($r->all as $record) { echo($record->ip." "); echo($record->ipcount." <br />"); } And I only get the last (fifth) record echo'ed out and no ipcount echoed. Is there a different way to go around this? I'm working on learning DataMapper (hence the questions) and need to figure some of this out. I haven't quite wrapped my head around the whole ORM thing.

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  • Is there an online tester for xPath selectors?

    - by alex
    I know there are some online regex evaluators.. very useful, matching in real time. They are like web applications of RegexBuddy. I was wondering if there is a similar thing for xPath selectors? I am just learning them and it would be valuable to me. Is there an online tester that allows you to input XML and then an xPath selector and match (live would be better, but I doubt someone has written a JavaScript interpreter?) them? Thanks

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  • Problem with constants in application.ini after PHP upgrade

    - by Marek
    Hi, I've upgraded PHP on my local dev system to version 5.3.0, and there is some problem when I use constants in application.ini - following manual http://framework.zend.com/manual/en/learning.quickstart.create-project.html I have: bootstrap.path = APPLICATION_PATH "/Bootstrap.php" which leads to: Warning: require_once(APPLICATION_PATH/Bootstrap.php) [function.require-once]: failed to open stream: No such file or directory in Zend\Application.php on line 320 any ideas? SOLVED: Actually name of my constant was _DIR_APPLICATION (code above was copied from ZF manual) - problem lies in this underscore at the begining - it seems that parse_ini_file() in PHP 5.3.0 doesn't replace constants named like this. Short test - you need two files: test.ini bootstrap.path = _DIR_APPLICATION "/Bootstrap.php" bootstrap.class = "Bootstrap" and test.php <?php define('_DIR_APPLICATION', 'test'); $data = parse_ini_file('test.ini'); print_r($data); try to run, then change constant name to 'DIR_APPLICATION' (in both files) and compare result ;)

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  • How to implement a graph-structured stack?

    - by Emil
    Ok, so I would like to make a GLR parser generator. I know there exist such programs better than what I will probably make, but I am doing this for fun/learning so that's not important. I have been reading about GLR parsing and I think I have a decent high level understanding of it now. But now it's time to get down to business. The graph-structured stack (GSS) is the key data structure for use in GLR parsers. Conceptually I know how GSS works, but none of the sources I looked at so far explain how to implement GSS. I don't even have an authoritative list of operations to support. Can someone point me to some good sample code/tutorial for GSS? Google didn't help so far. I hope this question is not too vague.

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  • MySQL "OR MATCH" hangs (long pause with no answer) on multiple tables

    - by Kerry
    After learning how to do MySQL Full-Text search, the recommended solution for multiple tables was OR MATCH and then do the other database call. You can see that in my query below. When I do this, it just gets stuck in a "busy" state, and I can't access the MySQL database. SELECT a.`product_id`, a.`name`, a.`slug`, a.`description`, b.`list_price`, b.`price`, c.`image`, c.`swatch`, e.`name` AS industry, MATCH( a.`name`, a.`sku`, a.`description` ) AGAINST ( '%s' IN BOOLEAN MODE ) AS relevance FROM `products` AS a LEFT JOIN `website_products` AS b ON (a.`product_id` = b.`product_id`) LEFT JOIN ( SELECT `product_id`, `image`, `swatch` FROM `product_images` WHERE `sequence` = 0) AS c ON (a.`product_id` = c.`product_id`) LEFT JOIN `brands` AS d ON (a.`brand_id` = d.`brand_id`) INNER JOIN `industries` AS e ON (a.`industry_id` = e.`industry_id`) WHERE b.`website_id` = %d AND b.`status` = %d AND b.`active` = %d AND MATCH( a.`name`, a.`sku`, a.`description` ) AGAINST ( '%s' IN BOOLEAN MODE ) OR MATCH ( d.`name` ) AGAINST ( '%s' IN BOOLEAN MODE ) GROUP BY a.`product_id` ORDER BY relevance DESC LIMIT 0, 9 Any help would be greatly appreciated.

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  • sys.stdout not reassigning to sys.__stdout__

    - by Vince
    I'm pretty new to Python so I am still just learning the language. One of the things I came across was reassigning sys.stdout to change the default output of print. So I wrote this as a test: import sys sys.stdout = open('log.txt','a') print('hey') sys.stdout.close() sys.stdout = sys.__stdout__ print('hi') Now the string 'hi' is not written to the file but it does not show in the default output either. When I assign some other variable to sys.stdout in the beginning and change it back it works, but I'm just wondering why its not changing back the first time.

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  • Search algorithm for a sorted double linked list

    - by SalamiArmi
    As a learning excercise, I've just had an attempt at implementing my own 'merge sort' algorithm. I did this on an std::list, which apparently already had the functions sort() and merge() built in. However, I'm planning on moving this over to a linked list of my own making, so the implementation is not particuarly important. The problem lies with the fact that a std::list doesnt have facilities for accessing random nodes, only accessing the front/back and stepping through. I was originally planning on somehow performing a simple binary search through this list, and finding my answer in a few steps. The fact that there are already built in functions in an std::list for performing these kinds of ordering leads me to believe that there is an equally easy way to access the list in the way I want. Anyway, thanks for your help in advance!

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  • django urls.py regex isn't working

    - by Phil
    This is for Django 1.2.5 and Python 2.7 on Wamp Server running apache version 2.2.17. My problem is that the my URLConf in urls.py isn't redirecting, it's just throwing a 404 error. urls.py: from django.conf.urls.defaults import * # Uncomment the next two lines to enable the admin: #from django.contrib import admin #admin.autodiscover() urlpatterns = patterns('', (r'^app/$', include('app.views.index')), # Uncomment the admin/doc line below to enable admin documentation: #(r'^admin/doc/', include('django.contrib.admindocs.urls')), # Uncomment the next line to enable the admin: #(r'^admin/', include(admin.site.urls)), ) views.py from django.http import HttpResponse def index(request): return HttpResponse("Hello World") I'm getting the following error: ImportError at /app/ No module named index I'm stumped as I'm only learning Django, can anybody see something wrong with my code? Here's my PythonPath: ['C:\Windows\system32\python27.zip', 'C:\Python27\Lib', 'C:\Python27\DLLs', 'C:\Python27\Lib\lib-tk', 'C:\wamp\bin\apache\Apache2.2.17', 'C:\wamp\bin\apache\apache2.2.17\bin', 'C:\Python27', 'C:\Python27\lib\site-packages', 'c:\wamp\www\seetwo']

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  • Perl/Tk : Giving alert to the user

    - by kiruthika
    Hi all, I am learning Perl/Tk. I want to give alert to the user whenever he/she receives the mail. I have planned to use message box in Tk,but it is expecting the user to click ok or cancel button. Until user clicked the any one button it wont do any further operations. But I want ,it just needs to give alert to the user and user can continue with the further process. Please help me.. Thanks in advance.

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  • Version Control for developers new to source control

    - by Daisetsu
    I've been writing code for a few years now and our backup strategy has been to zip the entire code directory up every few days and put it somewhere else on your hard drive, or occasionally upload it to some online file hosting service. Unfortunately the file hosting service got canceled without telling me and we lost years of backups. It's come down to the point where I finally have to learn to use version control. The only problems are My boss really doesn't like SVN, he tried it and it had a high learning curve (at least his client). We need a reliable place to host it (we can pay a reasonable amount). Can someone suggest what may be the best version control system and client for a newbie which won't be too annoying. Second what is a good remote version control service?

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  • DSP - How are frequency amplitudes modified using DFT?

    - by Trap
    I'm trying to implement a DFT-based equalizer (not FFT) for the sole purpose of learning. To check if it works I took an audio signal, analyzed it and then resynthesized it again with no modifications made to the frequency spectrum. So far so good. Now I tried to silence some frequency bands, just by setting their amplitudes to zero before resynthesis, but definitely it's not the way to go. What I get is a rather distorted signal. I'm using the so-called 'standard way of calculating the DFT' which is by correlation. I first tried to modify the real part amplitudes only, then modifying both the real and imaginary part amplitudes. I also tried to convert the DFT output to polar notation, then modifying the magnitude and convert back to rectangular notation, but none of this is working. Can someone show me what I'm doing wrong? I tried to find info on this subject in the internet but couldn't find any. Thanks in advance.

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  • What to learn in my summer holidays?

    - by rgksugan
    I am finishing my graduate and i am into a sotware company. I am a fresher and have some knowledge in Java and JEE. I can program servlets and JSP and have also developed some Swing applications. I dont have that much knowledge in web frameworks. I want to use my holidays usefully at the same time i dont want to spend a lot of time into programming. What can i learn. Suggest me something usefull. I prefer learning some programming tips/algorithms.

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  • avr-gcc Atmel AVR microncontrollers on Linux / Windows Arduino IDE

    - by Prakash
    I recently heard all about avr-gcc and avr-lib support on Linux that can be used for developing code for Atmel AVR micro-controller (ATmega48/88/168, ATmega16/32). I also understand that Arduino also uses Atmel's AVR micro-controller (I am not sure which one). Now different vendors have designed their own product (using Atmel AVR uc) where code is to be developed using avr-gcc i.e. on Linux platform. In the same regards Arduino's Windows IDE is much simpler and easy to code with. I am confused as to which platform is more promising - what are the benefits of learning avr-gcc? Which is the better option to program using the same? What type of application can we develop using avr-gcc compiler?

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  • can you help me with 8068 project for Delphi .net please

    - by Lex Dean
    To find an Assembly programmer is very hard to help me I'm a established Delphi programmer that has an old copy of Delphi that is not .net And I have a *.dll that I'm converting into Delphi code for .net I'm on a big learning curve hear as i know little of .net yet. I've just got a computer with .net today!!!!!! I've run the *.dll through a dissembler and started putting jump links in as writing in Delphi assembly you do not do any addressing, just reference links. The file has fixed string structures (i think C++) ASCII & ANSI strings 1/ I do not know how to identify how the code references these structures 2/ and I do not know were the functions begin and what shape they look like The code is free for any one to look at their is not many functions in it. but I have to email it as stack over flow will not allow me to display it. Can you tech me or can you refer me to a friend you may know please to tech me lexdeanair at hotmail.com Best regards, Lex Dean from New Zealand I do not wish to pester any one

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  • htaccess redirect from root to subfolder and then mask the url?

    - by KiwiCoder
    Hello all, Two things: Firstly - I have version 2 of a website located in a folder named v2, and I want to redirect any traffic that is NOT a child of the v2 folder, to www.example.com/v2 The old site located in the root was created in iWeb and has a LOT of subfolders and sub-subfolders. So: www.example.com/v2 = New site www.example.com/Page.html www.example.com/category/Page.html ww.example.com/category/subcategory/Page.html = All generic examples of what I need to redirect. Secondly, and I don't know if this is possible, I want to hide /v2/ in the URL, so that visitors will just see www.example.com/page even though they are actually on www.example.com/v2/page Links are hardcoded to the v2 folder, like so <a href="v2/contact.html" Any help is MOST appreciated. I've spent hours trying to figure this out, but I'm only just learning about htaccess and regular expressions, and am totally confused. Thanks so much!

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  • ColdFusion code parser?

    - by Kip
    I'm trying to create an app to search my company's ColdFusion codebase. I'd like to be able to do intelligent searches, for example: find where a function is defined (and not hit everywhere the function is called). In order to do this, I'd need to parse the ColdFusion code to identify things like function declarations, function calls, database queries, etc. I've looked into using lex and yacc, but I've never used them before and the learning curve seems very steep. I'm hoping there is something already out there that I could use. My other option is a mess of difficult-to-maintain regex-spaghetti code, which I want to avoid.

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  • Sell digital goods online

    - by Adam
    What's the best solution for a photographer wanting to sell image files online? I tried zencart, but it's way over the top and their backend looks like a 3 year old designed it. Is there a free solution out there? One that has easily modifiable templates and isn't too tedious to add hundreds of pictures for sale? I'm seriously thinking learning how to do it myself with the whole paypal IPN thing might be the way to go.. Suggestions is greatly appreciated! Adam

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  • Need direction in creating an application which generates a crud form

    - by AlteredConcept
    Hi all, I was wondering if anyone knew of any way i can implement an application which will do the following. Allow a user to specifiy a connection string to a sql db Allow a user to specify a table in the db Allow a user to specify columns from the specified table Generate Views & a Controller with Crud methods on the fly for the specified table columns in a subdirectory on the current web app. I'm aware that there are apps that currently do this (such as sharepoints list creation stuff), but i'd like to see how this was accomplished and recreate it for my own learning purposes. Thanks alot for any help

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  • How to use regex to match ASTERISK in awk

    - by Ken Chen
    I'm stil pretty new to regular expression and just started learning to use awk. What I am trying to accomplish is writing a ksh script to read-in lines from text, and and for every lines that match the following: *RECORD 0000001 [some_serial_#] to replace $2 (i.e. 000001) with a different number. So essentially the script read in batch record dump, and replace the record number with date+record#, and write to separate file. So this is what I'm thinking the format should be: awk 'match($0,"/*FTR")!=0{$2="$DATE-n++"; print $0} match($0,"/*FTR")==0{print $0}' $BATCH > $OUTPUT but obviously "/*FTR" is not going to work, and I'm not sure if changing $2 and then write the whole line is the correct way to do this. So I am in need of some serious enlightenment.

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