Search Results

Search found 2750 results on 110 pages for 'extraction operator'.

Page 63/110 | < Previous Page | 59 60 61 62 63 64 65 66 67 68 69 70  | Next Page >

• Creating a new variable versus assigning an existing one

  - by rwallace

  Which is more common, creating a new variable versus assigning an existing variable (field, array element etc - anything that syntactically uses the assignment operator)? The reason I ask is that I'm designing a new language, and wondering which of these two operations should get the shorter syntax. It's not intended to be a pure functional language, or the question wouldn't arise, so I'd ideally like to count usage across large existing code bases in procedural and object-oriented languages like C, C++ and Java, though as far as I can see there isn't an easy way to do this automatically, and going by memory and eyeball, neither is obviously more common than the other.

  Read the article

• The rule of 5 - to use it or not?

  - by VJovic

  The rule of 3 (the rule of 5 in the new c++ standard) states : If you need to explicitly declare either the destructor, copy constructor or copy assignment operator yourself, you probably need to explicitly declare all three of them. But, on the other hand, the Martin's "Clean Code" advises to remove all empty constructors and destructors (page 293, G12:Clutter) : Of what use is a default constructor with no implementation? All it serves to do is clutter up the code with meaningless artifacts. So, how to handle these two opposite opinions? Should empty constructors/destructors really be implemented?

  Read the article

• How to correctly set permisions for all subfolders and files

  - by Saeid87

  I am following the guide to install TinyOS on Ubuntu 12.04 I have done up to step 3, But I am not sure if I have done the step 3 correctly. Because by doing the step 4 I get the permission error : saeid@saeid-Satellite-C660:~$ tos-install-jni /usr/bin/tos-install-jni: 13: [: =: unexpected operator Installing 32-bit Java JNI code in /usr/lib/jvm/java-6-openjdk-i386/jre/lib/i386 ... install: cannot create regular file `/usr/lib/jvm/java-6-openjdk-i386/jre/lib/i386/libgetenv.so': Permission denied Can you please tell me what would be the actual commands for step 3? What I have to replace with following lines?: /opt/tinyos-2.x files: chown -R /opt/tinyos-2.x Change the permissions on any serial (/dev/ttyS), usb (/dev/tts/usb, /dev/ttyUSB), or parallel (/dev/parport) devices you are going to use: chmod 666 /dev/ I mean how would you do those steps in your ubuntu?

  Read the article

• T-SQL Tuesday: What kind of Bookmark are you using?

  - by Kalen Delaney

  I’m glad there is no minimum length requirement for T-SQL Tuesday blog posts , because this one will be short. I was in the classroom for almost 11 hours today, and I need to be back tomorrow morning at 7:30. Way long ago, back in SQL 2000 (or was it earlier?) when a query indicated that SQL Server was going to use a nonclustered index to get row pointers, and then look up those rows in the underlying table, the plan just had a very linear look to it. The operator that indicated going from the nonclustered...(read more)

  Read the article

• Most appropriate diagram for GUI button design?

  - by JustADude

  What is the most appropriate diagram for GUI button design? Specifically, I have numerous buttons that will be changing color based on state information from operator input and input from various subcomponents and sensors. I would like to use UML or some other type of design diagrams to be able to capture the color transition. Some folks have suggested sequence diagrams, but I haven't been able to find any good examples that show how to incorporate this design artifact. I would really like to head in this direction to help developers. Thanks a ton for feedback and insights.

  Read the article

• DOMDocument programming: a lot of little dilemmas, how to solve them?

  - by Peter Krauss

  I need elegance and performance: how to decide by the "best implementation" for each DOM algorithm that I face. This simple "DOMNodeList grouper" illustrate many little dilemmas: use iterator_to_array or "populate an array", when not all items need to be copied. use clone operator, cloneNode method or import method? use parentNode::method() or documentElement::method? (see here) first removeChild or first replaceChild, no avoids "side effects"? ... My position, today, is only "do an arbitrary choice and follow it in all implementations" (like a "Convention over configuration" principle)... But, there are another considerations? About performance, there are some article showing benchmarks? PS: this is a generic DOM question, any language (PHP, Javascript, Python, etc.) have the problem.

  Read the article

• Are sequence designs appropriate for GUI button design?

  - by JustADude

  Specifically, I have numerous buttons that will be changing color based on state information from operator input and input from various subcomponents and sensors. I would like to use UML or some other type of design diagrams to be able to capture the color transition. Some folks have suggested sequence diagrams, but I haven't been able to find any good examples that show how to incorporate this design artifact. I would really like to head in this direction to help developers. Are sequence designs in fact, appropriate, or is there a more appropriate design?

  Read the article

• Limitation of high level languages? [closed]

  - by user1705796

  My question may look bit philosophical and nonsense! But I need to know kind of instructions those are not well suitable in high level languages even in c? Or rarely use in the development of software? Like read/write content of CPU registers may useful in debugging programs. And access to cache memory required when developing OS (maybe I am wrong at this point). Is this kind of instruction available languages like Java, Python, C? I also have a second question: And Why all high level languages not having same uniform syntax; at-least same standard library interface name? In python there is and. Or operator is almost same as && and ||. I think Python is developed after C but space indentation is compulsory in Python. Why Python does not use brackets {}. I already know this question going to be highly down-voted.

  Read the article

• Fixing Gatekeeper Row Cardinality Estimate Issues

  The Query Optimiser needs a good estimate of the number of rows likely to be returned by each physical operator in order to select the best query plan from the most likely alternatives. Sometimes these estimates can go so wildly wrong as to result in a very slow query. Joe Sack shows how it can happen with SQL Queries on a data warehouse with a star schema. Make working with SQL a breezeSQL Prompt 5.3 is the effortless way to write, edit, and explore SQL. It's packed with features such as code completion, script summaries, and SQL reformatting, that make working with SQL a breeze. Try it now.

  Read the article

• Excel parsing (xls) date error

  - by tau-neutrino

  I'm working on a project where I have to parse excel files for a client to extract data. An odd thing is popping up here: when I parse a date in the format of 5/9 (may 9th) in the excel sheet, I get 39577 in my program. I'm not sure if the year is encoded here (it is 2008 for these sheets). Are these dates the number of days since some sort of epoch? Does anyone know how to convert these numbers to something meaningful? I'm not looking for a solution that would convert these properly at time of parsing from the excel file (we already have thousands of extracted files that required a human to select relevant information - re-doing the extraction is not an option).

  Read the article

• Winrar sfx deletes files too early

  - by Simon Ottenhaus

  I'm trying to build a sfx (self extracting archive) using winrar. I'm using VS2008 to build a setup.exe and a myapp.msi. If setup.exe is executed it does some checking an launches myapp.msi I'm using some sfx options to make the extraction quiet and make it extract so some temp folder: ;Der folgende Kommentar enthält SFX-Skriptbefehle Setup=setup.exe TempMode Silent=2 Overwrite=1 It seems winrar deletes the msi right after setup.exe is launched. Setup.exe can't find the msi and crashes. Is there some way to fix this?

  Read the article

• access denied trying extracting an archive on the windows user temp folder

  - by Hanan

  I'm trying to run a command-line process (which is extraction of a .7z archive) on a file that lies in a temporary folder on the windows user temp directory (C:\Documents and Settings\User\Local Settings\Temp), using Process in my c# app. I think the process return error that happens because of "access denied" because I can see a win32Exception with error code 5 when I dig in the prcoess object of .NET. doing the same on some other location worked fine before, so I guess maybe it's something I'm not supposed to do ? (running a process to use a file on the the %TEMP%) perhaps I need to pass security somehow?

  Read the article

• What are the best measures to protect content from being crawled?

  - by Moak

  I've been crawling a lot of websites for content recently and am surprised how no site so far was able to put up much resistance. Ideally the site I'm working on should not be able to be harvested so easily. So I was wondering what are the best methods to stop bots from harvesting your web content. Obvious solutions: Robots.txt (yea right) IP blacklists What can be done to catch bot activity? What can be done to make data extraction difficult? What can be done to give them crap data? Just looking for ideas, no right/wrong answer

  Read the article

• not readable PDF files

  - by Michal_R

  Hello, I am writing Master's thesis - NLP system. I have one component - extractor. It is extracting a plain text from PDF files. There are a few PDF files that can not be extracted correctly. Extractor (PDFBox library) returns a string like this: "¦xDn¦if|d+gDF"Ti&cD+lh d FÁhis~n +xd f«"d¦ffih »h" or "10a61a91a22a25a3a27a17a23a20a8a13a14a61a25a17" I was checking each file that makes this extraction's problem and all these files' text also can not be copy-pasted from PDF Reader (Adobe Reader and FoxIt reader). Viewing them in this readers is enabled, but after selecting its content and copying to the clipboard I get the same wrong text (as described above - strings of not semanticaly correct chars or strings of digits and letters) Could anybody help me??? THX :)

  Read the article

• Save batch file path to local harddisk

  - by Brian

  Hi, I have a batch file that is Run when a selfextraction file is executed. The self extracted files must be copied to to specefic place on the harddisc. In the batch file the user is asked where the path is (if it's not located the default place) Part of the batch file: @ECHO OFF IF EXIST "C:\Program Files\program\program.exe". ( set PROGRAMPATH=C:\Program Files\ ) ELSE ( echo Program folder was not found. Please enter the path for Program set /p PROGRAMPATH=Path: ) echo Copying data to "%PROGRAMPATH%"... copy /Y "*.txt" "%PROGRAMPATH%" Now for my question. If a user then enters a new path, is it possible to save that path. So when he executes the self extraction packagde again, it could remember that new path?

  Read the article

• Writing my own iostream utility class: Is this a good idea?

  - by Alex

  I have an application that wants to read word by word, delimited by whitespace, from a file. I am using code along these lines: std::istream in; string word; while (in.good()) { in>>word; // Processing, etc. ... } My issue is that the processing on the words themselves is actually rather light. The major time consumer is a set of mySQL queries I run. What I was thinking is writing a buffered class that reads something like a kilobyte from the file, initializes a stringstream as a buffer, and performs extraction from that transparently to avoid a great many IO operations. Thoughts and advice?

  Read the article

• Count word occurrences in a text field with LINQ

  - by Yoann. B

  How can i get the occurrences count of a Word in a database text field With LINQ ? Keyword token sample : ASP.NET EDIT 4 : Database Records : Record 1 : [TextField] = "Blah blah blah ASP.NET bli bli bli ASP.NET blu ASP.NET yop yop ASP.NET" Record 2 : [TextField] = "Blah blah blah bli bli bli blu ASP.NET yop yop ASP.NET" Record 3 : [TextField] = "Blah ASP.NET blah ASP.NET blah ASP.NET bli ASP.NET bli bli ASP.NET blu ASP.NET yop yop ASP.NET" So Record 1 Contains 4 occurrence of "ASP.NET" keyword Record 2 Contains 2 occurrence of "ASP.NET" keyword Record 3 Contains 7 occurrence of "ASP.NET" keyword Collection Extraction IList < RecordModel (ordered by word count descending) Record 3 Record 1 Record 2 LinqToSQL should be the best, but LinqToObject too :) NB : No issue about the "." of ASP.NET keyword (this is not the goal if this question)

  Read the article

• How do I render a partial to a string from within a filter attached to a controller

  - by Tristan Havelick

  I have some code I need to use in multiple controllers in a rails 1.0 application (I can't, for strange reasons upgrade to a newer rails). I've extracted the relevant code into a filer object, and I'm using the around_filter construct to execute it. Before the extract, I was using the method render_to_string() to get the contents of a rendered partial into a string. However, this method is protected, so I am unable to access it from within my Filter object. As a workaround, I tried adding this to my ApplicationController: def render_to_string(*a) super(*a) end this seems to have remedied the protection level issue, but now I get the error: Can only render or redirect once per action When no such error occurred before the extraction. Why? Is there a different approach I should take here?

  Read the article

• One regular expression to match parts in various positions

  - by richsage

  Hi all, I'm trying to parse a DSN (from a Symfony application) using regular expressions, in order to link with a secondary application, but using the same database. The DSN I currently have is: mysql:dbname=my_db_name;host=localhost with a regex of: /^(\w+):(dbname=(\w+))?;?(host=(\w+))?/ (using preg_match()). This matches OK, but fails in my test environment because the DSN elements are switched around, thus: mysql:host=localhost;dbname=my_testdb_name I could just switch them round, yes :-) but I'm sure that extraction of the host and dbname parts from both DSNs is possible with a single regular expression, and I'd like to be able to enhance my knowledge at the same time ;-) Is there a way I can do this?

  Read the article

• Track Pedestrians

  - by 2vision2

  I am using OpenCV sample code “peopledetect.cpp” to detect and track pedestrians. The code uses HoG for feature extraction and SVM for classification. Please find the reference paper used here. The camera is mounted on the wall at a height of 10 feet and 45 degree down. There is no restriction on the pedestrian movement within the frame. I want to track the detected pedestrians’ movement within the frame. The issue I am facing is pedestrians are detected only in the middle region of the frame as most of the features are not visible as soon as the pedestrian enters the frame region. I want to track each person’s movement in the entire frame region. How to do it? Is tracking required? Can anyone give any reference to blogs/codes?

  Read the article

• Open zip file without temporary files

  - by Javis Perez

  i've seem this post about extracting a zip without a temporary file via stream and pipes: Open a file from archive without temporary extraction The problem is that i'm using php and have no idea if that is possible. I've search a lot with no luck. My idea is to preview zip files from the dropbox using its API but i dont want to save the files to a local drive, just preview the content. Any idea if that's possible with php? Almost everything i found is about creating the file, not reading it... :-\ I was thinking that i might try with nodejs, but i know mostly nothing about nodejs, do you think it would support it? Any other idea please? thank you.

  Read the article

• Data Visualization Prototype (Java/Eclipse/DAO/Relational DB)

  - by Vince

  Hello, I am building a prototype application which displays various 2D & 3D data charts. I am using a third party library for the charts, the database and data extraction layer have already been coded. Can you advise on a good desktop Framework to use within Eclipse to provide a 'professional' looking GUI with minimum coding required (This is just a prototype). Further can anyone advise an effective method to port this application to a web server so users could access remotely? I have limited experience with GWT, are their more suitable alternatives? Many Thanks

  Read the article

• How to extract tags from XML

  - by uku

  Hi, I have a simple XML extraction issue that should be solvable with straight PHP and not require any libraries. All I need to do is extract the values of one tag. For example, given the string of XML: <ResultSet xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" ....> <Result>Foo</Result> <Result>Bar</Result> </ResultSet> I just need to put Foo and Bar in an array. What is the easiest way to do this? Thanks!

  Read the article

• Reading PDF metadata in PHP

  - by Mark Trapp

  I'm trying to read metadata attached to arbitrary PDFs: title, author, subject, and keywords. Is there a PHP library, preferably open-source, that can read PDF metadata? If so, or if there isn't, how would one use the library (or lack thereof) to extract the metadata? To be clear, I'm not interested in creating or modifying PDFs or their metadata, and I don't care about the PDF bodies. I've looked at a number of libraries, including FPDF (which everyone seems to recommend), but it appears only to be for PDF creation, not metadata extraction.

  Read the article

• Minimal files to run a fully-functional PostgreSQL in Windows

  - by fxam

  I would like to bundle PostgreSQL into my application. I downloaded the PostgreSQL 9 beta zip without the installer. After extraction, there are 8 directories. I found out that at least the following directories are required to run PostgreSQL properly, at least under my experiments. bin lib share The question is, are the above three directories really sufficient to run a fullly functional PostgreSQL? Do I need the 'include' and 'symbols' directories? Also, can I remove 'share\locale' if I don't use these locales?

  Read the article

< Previous Page | 59 60 61 62 63 64 65 66 67 68 69 70  | Next Page >