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• std::map default value for build-in type

  - by Qifa Zhao

  Recently, I was confused by the std::map operator[] function. In the MSDN library, it says: "If the argument key value is not found, then it is inserted along with the default value of the data type." I tryed to search much more exactly explanation for this issue. For example here: std::map default value In this page, Michael Anderson said that "the default value is constructed by the default constructor(zero parameter constructor)". Now my quest comes to this:"what the default value for the build-in type?". Was it compiler related? Or is there a standard for this issue by the c++ stardard committee? I did a test on visual studio 2008 for the "int" type, and found the "int" type is construted with the value 0.

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• Do you have any tips for comments to keep them in step with the code? [closed]

  - by Rob Wells

  Possible Duplicate: How do you like your comments? G'day, I've read both of Steve McConnell's excellent Code Complete books "Code Complete" and "Code Complete 2" and was wondering if people have any other suggestions for commenting code. My commenting mantra could be summed up by the basic idea of expressing "what the code below cannot say". While enjoying this interesting blog post by Jeff about commenting I was still left wondering "When coding, when do you feel a comment is required?" Edit: Oops. Seems to be a duplicate of this question http://stackoverflow.com/questions/121945/how-do-you-like-your-comments so sorry for the noise. Thanks to my, seemingly, SO shadow for pointing it out - wouldn't have thought I was that interesting. Now off to read the original post and see if it is relevant. Edit: I meant to emphasise the best appraoch to ensure that your comments will stay in step with the code. Maybe expressing an intent rather than the mechansim for instance.

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• ReportViewer Cell Formatting

  - by firedrawndagger

  I need to change the color of a cell in ReportViewer based on its value. 1) I got the first part down - I'm comparing the difference between two numbers like so: =IIf(Fields!variance.Value > 0) 2) Now how do I actually change the visual formatting of the cell? A web standards way would be to add a class - since then you can format the class to whatever you like, e.g. changing borders, typography, bacgkround color etc. Since ReportViewer sucks and doesn't have that functionality what should I use instead? Any hacks I could use?

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• Coda Clips for Vim

  - by XLR3204S

  I'm currently trying to switch from Coda (a Mac IDE) to Vim. One thing I loved about Coda and my knowledge of Vim cannot replace were the so-called "clips". Basically, you type, say, "new", press TAB, and the text is replaced with a basic XHTML page. And you can add as many keyword/clips combinations as you want. The most I could get with Vim so far was to create a new file containing my clip, and then use :r FILE in Vim in order to get it inserted, but this is not a very elegant solution, as I'd have to carry these clips around in every directory I have a file I want to use my clips with. So assuming I've explained things properly, what would be my choices?

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• How to acces File over the Network

  - by Polo

  Hi! I am having a hard time on this one, I have à folder over the network wit public accès (no credential restriction). I am trying to do à File.Exist or Directory.Exist and I keep on having a exception. Can somewone tell me the good way to do IO over the network. EDIT 1 FOR DETAILS: if i do execture = \agoodip\Public\test.txt I get the file etc etc In my code it look like a basic Directory.Exist(@"\agoodip\Public") or File.exist(@"\agoodip\Public\test.txt") The exception I get is Path not found. Thanks!

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• Related objects in reportingviewer 10.0.0.0 give #error

  - by Bart-Jan Poirot

  In my VB.net apps i make use of Linq2SQL and Reportviewer with RDLC reports. With Visual Studio 2010 they upgraded this reportviewer component so you can use the newer RDL specification from 2008. Now I've a problem to show related objects. For example assume you provide an order to the datasource of the report and then you can show something like Fields!Customer.Value.Name where Customer is a related entity. I also got the error in my immediate window: *Warning: The Value expression for the textrun ‘Name_1.Paragraphs[0].TextRuns[0]’ contains an error: The specified operation is not valid. (rsRuntimeErrorInExpression)*

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• TStringGrid with BOTH editing AND range selection?

  - by Kevin Killion

  Question: Can anyone point to an article or code samples anywhere on how to provide BOTH editing AND range selection in a TStringGrid? Yes, I KNOW there are third-party grids that do this, but it's frustrating that the built-in grid lacks this basic capability. Background: It's pretty normal to expect to be able to both edit a cell in a grid, and also to select a range of cells such as for a Copy operation. As delivered, TStringGrid doesn't do that. It's either/or. In fact, the docs tell us about the grid Options, "When goEditing is included in Options, goRangeSelect has no effect". However, it looks like it may be possible to do editing and rangeselects in a TStringGrid anyway!!! Through careful use of the mousedown, mouseup, selectcell and exit events, you can get dang close by switching editing elements on and off at the right times. But I still don't have it perfect, and that only covers mouse use, not keyboard changes.

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• Carrierwave upload to a tmp dir before saving to database

  - by user827570

  I'm trying to build a visual editor where users can click an image they are presented with an image upload form once the upload is done I use ajax to return the image and insert it back into the page. But the above method inserts the image straight into the database but I want users to be able to visualize the image before the image is inserted into the database. So I was wondering if the image using carrierwave could be uploaded to a temp location, sent back to the user and then when the user saves the page the image is moved into the permanent location. Here's what I have so far. def edit_image @page = Page.find(1) @page.update_attributes(params[:page]) @page.save return :text => @page.file end But this is what I want to achieve def temp_image #uploads received image to a temp location #returns image to the user end And once the user clicks save def save #moves the file in the temp folder to the permanent location end Cheers

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• How to have a dynamic theme color in WPF

  - by Ingó Vals

  In WPF I have a few resource dictionaries and in them styles for my panels and controls in my app. I'm reusing the same colors again and again. I actually have 5 colors and they give my app a good color-scheme. However if I wan't to change the theme I have to go into the RD's and change each and every color there. I would like to somewhere have the colors set but don't know how or where. I tried to put a color tag in one RD but as soon as I referenced it in the same RD Visual Studio crashed. Also the best solution would be that I could have the color as a dynamic setting in the app itself so users could even change it themselves.

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• not getting output from parmiko/ssh command

  - by Matt

  I am using paramiko/ssh/python to attempt to run a command on a remote server. When I ssh manually and run the command in question, I get the results I want. But if I use the python (co-opted from another thread on this site) below, there is no returned data. If I modify the command to be something more basic like 'pwd' or 'ls' I can then get the output. Any help is appreciated. Thanks, Matt import paramiko import time import sys, os, select import select username='medelman' password='Ru5h21iz' hostname='10.15.27.166' hostport=22 cmd='tail -f /x/web/mlog.txt' #works cmd='' #doesn't work client = paramiko.SSHClient() client.load_system_host_keys() client.connect(hostname=hostname, username=username, password=password) transport = client.get_transport() channel = transport.open_session() channel.exec_command(cmd) while True: rl, wl, xl = select.select([channel],[],[],0.0) if len(rl) 0: # Must be stdout print channel.recv(1024) time.sleep(1)

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• In using Samsung acclerometer

  - by cheesebunz

  Hi everyone , i have this sample code i want to use. I'm not sure where to place it. I'm using Visual studio 2008 , windows mobile 6 sdk. I wish to test the accelerometer but i'm not sure where i should code it. The start is e.g. form1. Do i create new existing item new program.cs a new C# file and do this(as of below)? #include "smiAccelerometer.h" SmiAccelerometerVector accel; // get the acceleration vector containing X, Y, Z components if (SmiAccelerometerGetVector(&accel) == SMI_SUCCESS) { // Successfully got acceleration. // Use accel.x, accel.y and accel.z in your application } else { // failed to get the acceleration }

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• .net Components ... a Custom Form

  - by carlos

  Hi, I've been working in the creation of some custom components adding functionalites to the basic components such as a Datagridview. Now I want to create a custom Form ... I mean, when I choose add new item in the VS menu, there is a Windows form and some varians of it like an about box, or Dialog, that are simple Forms with a custom controls already on it. I want to have a login form for my set of applications, so this login is avialable for all the development team to use it in the different modules. How can I develop the form and then add it to the "Add New Item" screen? Thanks !!!

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• I need a program to store the database script for oracle

  - by Hakan Kara

  We are developing a project that has 3 enviroments (development, test, production) So there are 3 databases (actually more than 3, because we have 5 customers so we have more than 10 databases) and they must be synchronised. There are 30 coders working for this project. Everone adds, deletes, and changes procedures, table columns etc. We need a program to store our database scripts like visual studio's team foundation server. See the change history of script file. Everyone must access that program and be able to put their scripts. Recover previous versions of script file. Execute these scripts over a selected database. Compare databases by procedures (not only by name, by content of procedure), functions, table columns, packages etc. I am searching a program like that. Which one do you suggest me?

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• C++ input chaining in C#

  - by Monty

  I am trying to learn C# coming from C++. I am writing just some basic console stuff to get a feel for it and was wondering if it is possible to do simple chaining of inputs in C#. For example in C++: cout<<"Enter two numbers: "; cin >> int1 >> int2; You could then just input 3 5 and hit enter and the values will be fine. In C# however I have to split it up(as far as I can tell) like this: Console.Write("Enter the first number: "; int1 = (char)Console.Read(); Console.Writeline(""); Console.Write("Enter the second number: "; int2 = (char)Console.Read(); Maybe I am just missing something.

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• XSLT good choice for web framework?

  - by Xepoch

  I've always thought of XML (and SGML before that) data as the devil's format. I'm of the old database and flat files school. Nonetheless, we are developing a commercially-available web product who's framework is based off of translating/transforming XML data in chains. As we're interviewing for positions as well talking to potential customers, they love the concept of what it will do but are weary of supporting XSLT long-term. One person even called it the proverbial "dead." Dead like COBOL, Unix, and C or dead like Apple Business BASIC? Anyway, I'm curious if building a web framework on XSLT is really not cutting edge enough (oddly) for companies. Are there inherent XSLT implementation problems that make this venture something worth reconsidering?

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• Why is only the suffix of work_index hashed?

  - by Jaroslav Záruba

  I'm reading through the PDF that Brett Slatkin has published for Google I/O 2010: "Data pipelines with Google App Engine": http://tinyurl.com/3523mej In the video (the Fan-in part) Brett says that the work_index has to be a hash, so that 'you distribute the load across the BigTable': http://www.youtube.com/watch?v=zSDC_TU7rtc#t=48m44 ...and this is how work_index is created: work_index = '%s-%d' % (sum_name, knuth_hash(index)) ...which I guess creates something like 'mySum-54657651321987' I do understand the basic idea, but is why only one half of work_index is hashed? Is it important to hash only part of it leaving the suffix out? Would it be wrong to do md5('%s-%d' % (sum_name, index)) so that the hash would be like '6gw8....hq6' ? I'm Java guy so I would use md5 to hash, which means I get id like 'mySum' + 32 characters. (Obviously I want my ids/keys to be as short as possible here.) If I could hash the whole string my id would be just 32 chars. Or would you suggest to use something else to do the hashing with?

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• input file cannot be found

  - by Eric Smith

  I am just messing around with reading input files with java until I got stumped at the most basic of steps... finding the input file! The input.txt file is in the same directory as my class file that is calling it yet eclipse still gives me an error that it cant be found: "Exception in thread "main" java.lang.Error: Unresolved compilation problem: Unhandled exception type FileNotFoundException" My code: package pa; import java.util.Scanner; public class Project { public static void main(String[] args) { java.io.File file = new java.io.File("input.txt"); System.out.println(file.getAbsolutePath()); Scanner input = new Scanner(file); } } input.txt is in the same package, same folder and everything. I'm confused :(

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• How to read a technical book to remember most of it?

  - by LikeToCode

  There are many technical books that become thinker and thicker and the pressure from the technical society is more and more to read them and remember many concepts described in them. But it's so hard to do it. I have only a few hour a week to read them and when I reach the middle of the book I forgot most of what I've read at the beginning, because lots of time passed. If I go back, I'll just re-read the same stuff over and over, never going past 50% of the book. So, even after I finished reading a thick tech book I forgot most of it. How do you remember all that stuff? I had a talk in my University on how to do it. They advised to use some cards with basic info so that you can remember the details when you look at it. Do you use such cards or do you have other ideas how to do it?

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• Placement of axis labels at minor breaks with ggplot2

  - by JAShapiro

  I am using ggplot2 to do some plotting of genomic data, so the basic format is that there is a chromosome and a position along it. I convert the positions to be on a continuous scale, then put the breaks at the boundaries of the chromosomes with: scale_x_continuous("Genome Position", breaks = c(0, cumsum(chromosome_length))) That looks great, as far as the actual plotting is concerned, but the labels are then put at the start and end of the chromosomes. I would like them to be centered along each chromosome, at the position where the minor break is drawn by default. Is this possible?

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• nHibernate: Query tree nodes where self or ancestor matches condition

  - by Famous Nerd

  I have see a lot of competing theories about hierarchical queries in fluent-nHibernate or even basic nHibernate and how they're a difficult beast. Does anyone have any knowledge of good resources on the subject. I find myself needing to do queries similar to: (using a file system analog) select folderObjects from folders where folder.Permissions includes :myPermissionLevel or [any of my ancestors] includes :myPermissionLevel This is a one to many tree, no node has multiple parents. I'm not sure how to describe this in nHibernate specific terms or, even sql-terms. I've seen the phrase "nested sets" mentioned, is this applicable? I'm not sure. Can anyone offer any advice on approaches to writing this sort of nHibernate query?

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• How Do You Profile & Optimize CUDA Kernels?

  - by John Dibling

  I am somewhat familiar with the CUDA visual profiler and the occupancy spreadsheet, although I am probably not leveraging them as well as I could. Profiling & optimizing CUDA code is not like profiling & optimizing code that runs on a CPU. So I am hoping to learn from your experiences about how to get the most out of my code. There was a post recently looking for the fastest possible code to identify self numbers, and I provided a CUDA implementation. I'm not satisfied that this code is as fast as it can be, but I'm at a loss as to figure out both what the right questions are and what tool I can get the answers from. How do you identify ways to make your CUDA kernels perform faster?

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• New to programming

  - by Shaun

  I have a form (Quote) with an auto-number ID, on the form at the moment are two subforms that show different items (sub 1 shows partition modules sub 2 shows partition abutments) both forms use the same parts tables to build them. Both forms are linked to the quote form using the ID. All works well until the forms is refreshed or re-loaded, subform 1 shows the module names and quantities and blank spaces for the abutment names but shows the quantiews for the abutments, the reverse of this is shown in the abutments subform 2. When the lists for the variuos types and the detailed parts lists are printed they are correct. This seems to be only a visual problem. All based on Access 2003. Subform 1 SELECT Quote_Modules.ModuleID, Quote_Modules.QuoteID, Quote_Modules.ModuleDescription, Quote_Modules.ModuleQty, Quote.Style, Quote.Trim FROM Quote INNER JOIN Quote_Modules ON Quote.QuoteID=Quote_Modules.QuoteID ORDER BY Quote_Modules.ModuleID; Subform 2 SELECT Quote_Modules.ModuleID, Quote_Modules.QuoteID, Quote_Modules.ModuleDescription, Quote_Modules.ModuleQty, Quote.Style, Quote.Trim FROM Quote INNER JOIN Quote_Modules ON Quote.QuoteID=Quote_Modules.QuoteID ORDER BY Quote_Modules.ModuleID;

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• Infopath form publishing and root content type ?

  - by Steve B

  Hi, I have several infopath 2010 form template that I want to publish to a form library in SharePoint 2010 Server with enterprise CaL. All of this forms have a common part (a template part actually). Is it possible to define a common "parent" content type of this forms ? In fact, I want : Form content type (SP OOB) My root form content type, with standard columns "requester", "process name", etc. Form 1 Form 2 etc. other unrelated form 1 other unrelated form 2 Instead of the standard behavior : Form content type (SP OOB) Form 1 Form 2 other unrelated form 1 other unrelated form 2 etc. Behind this question I want to be able to create a dashboard of all form request using a content query web, by simply specifying the content type ... One last word: the idea is to allow a customer (assuming its knowledge is limited to IP 2010 basic form design). So I can't accept answers like "extract files, use a text editor and hack the xsf file"... thx in advance

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• Powershell and some simple string manipulation

  - by Pat

  need some help with building a powershell script to help with some basic string manipulation. I know just enough powershell to get in trouble, but can't figure out the syntax or coding to make this work. I have a text file that looks like this - Here is your list of servers: server1 server2.domain.local server3 Total number of servers: 3 I need to take that text file and drop the first and last lines (Always first and last.) Then I need to take every other line and basically turn it into a CSV file. The final output should be a text file that looks like this - server1,server2.domain.local,server3 Any suggestions on where to start? Thanks!

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• What's the best way to handle web.config file versions in ASP.Net?

  - by MusiGenesis

  I have an ASP.Net web site (ASPX and ASMX pages) with a single web.config file. We have a development version and a production version. Over time, the web.config files for development and production have diverged substantially. What is the best practice for keeping both versions of web.config in source control (we use Tortoise SVN but I don't think that matters)? It seems like I could add the production web.config file with a name like "web.config.prod", and then when we turnover all the files we would just add the step of deleting the existing web.config and renaming web.config.prod to web.config. This seems hackish, although I'm sure it would work. Is there not some mechanism for dealing with this built in to Visual Studio? It seems like this would be a common issue, but I haven't found any questions (with answers) about this.

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