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  • How to start on programming?

    - by Stustu
    At an old age I decided to start programming. I'm fascinated with graphics and web development. I understand general concepts of programming, like loops, functions etc. Which is the language to learn? How to start?

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  • STL: writing "where" operator for a vector.

    - by Arman
    Hello, I need to find the indexes in the vector based on several boolean predicates. ex: vector<float> v; vector<int> idx; idx=where( bool_func1(v), bool_func2(v), ... ); What is the way to declare **where** function, in order to use the several user defined boolean functions over the vector? thanks Arman.

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  • Gridview - Is it necessary to grab data from database every time a filter, sort, or paging event occ

    - by hamlin11
    Regarding gridviews that are not bound to a Data Source Control: In most GridView tutorials that I have seen, when just about any GridView event occurs, the end of the event handler will include BindDataGrid(). In some form, these BindDataGrid() functions 1) Grab data from the database 2) Assign any Filter or Sort expressions to the data, and 3) Bind the gridview to that data source (usually a DataView or DataTable. Is there a better way to provide filterable & sortable data to a GridView without having to hit the database so often? Thanks

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  • jQuery Adding DOM Elements

    - by Aren B
    This may be a simple answer, but I'm trying to add a dom-created element (i.e. document.createElement(...)) to a jQuery Selector. jQuery has a great assortment of functions for adding html .html(htmlString) .append(htmlString) .prepend(htmlString) But what i want to do is add a dom OBJECT var myFancyDiv = document.createElement("div"); myFancyDiv.setAttribute("id", "FancyDiv"); // This is the theoretical function im looking for. $("#SomeOtherDiv").htmlDom(myFancyDiv);

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  • How do I profile in DrScheme?

    - by kunjaan
    How Do I profile my functions using DrScheme? (require profile) (define (factorial n) (cond ((= n 1) 1) (else (* n (factorial (- n 1)))))) (profile factorial) The above code returns Profiling results ----------------- Total cpu time observed: 0ms (out of 0ms) Number of samples taken: 0 (once every 0ms) ==================================== Caller Idx Total Self Name+srcLocal% ms(pct) ms(pct) Callee ==================================== > I tried: - (profile (factorial 100)) - (profile factorial) (factorial 100) But it gives me the same result. What am I doing wrong?

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  • Basic social network functionality

    - by Dimitar Vouldjeff
    Hi, I'm going to develop a social like network using Ruby on Rails. For this app I need basic social functionality like friends, activities, authentication, user profile, facebook connect, comments. I searched for rails plugins with social functions and i found - tog and community engine. So which is better and more easier to extend? Thanks

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  • What's a good library for parsing mathematical expressions in java?

    - by CSharperWithJava
    I'm an Android Developer and as part of my next app I will need to evaluate a large variety of user created mathematical expressions and equations. I am looking for a good java library that is lightweight and can evaluate mathematical expressions using user defined variables and constants, trig and exponential functions, etc. I've looked around and Jep seems to be popular, but I would like to hear more suggestions, especially from people who have used these libraries before.

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  • How do I subvert computer idle detection on Windows?

    - by sharptooth
    In order to detect user absence GetLastInputInfo() can be used. I want to make GetLastInputInfo() return that I've just used keyboard/mouse all the time - as I've been actively using the computer so that whoever relies on GetLastInputInfo() thinks I'm actively using the computer. Can I use any Windows API functions to achieve that?

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  • Count number of arguments to Excel formula in VBA

    - by Abiel
    I need to use VBA to determine the number of arguments passed to an Excel formula. For instance, suppose a cell contains the formula =MyFunc($A$1, "xyz", SUM(1,2,COUNT(C1:C12)), IF(B12,1,0)). Then the counter function should return 4. Does VBA contain any built-in functions for this, or does someone have an example of a regular expression that could calculate this?

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  • GCD function in matlab

    - by SalemFayad
    hi, i am looking for a way to implement the "gcd" function used in matlab in another language but i really cant understand the way it functions. it says in http://www.mathworks.com/access/helpdesk/help/techdoc/ref/gcd.html that: "[G,C,D] = gcd(A,B) returns both the greatest common divisor array G, and the arrays C and D, which satisfy the equation: A(i).*C(i) + B(i).*D(i) = G(i)." but it says nothing about how it calculates C and D. i would be grateful if someone has a clearer idea about this subject! thanks:)

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  • SQL Server backward compatibility in Entity Framework?

    - by shake
    Is there any backward compatibility in the entity framework between SQL Server 2008 and 2005? It seems the framework forces you to use the same provider for all the .edmx files in a solution. If you use the 2008 provider, data types like DateTime2 and functions like SysDateTime that are emitted by the framework to the underlying SQL query make it useless to use them against a SQL 2005 Server. Any way around this?

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  • Expression Tree with Property Inheritance causes an argument exception

    - by Adam Driscoll
    Following this post: link text I'm trying to create an expression tree that references the property of a property. My code looks like this: public interface IFoo { void X {get;set;} } public interface IBar : IFoo { void Y {get;set;} } public interface IFooBarContainer { IBar Bar {get;set;} } public class Filterer { //Where T = "IFooBarContainer" public IQueryable<T> Filter<T>(IEnumerable<T> collection) { var argument = Expression.Parameter(typeof (T), "item"); //... //where propertyName = "IBar.X"; PropertyOfProperty(argument, propertyName); } private static MemberExpression PropertyOfProperty(Expression expr, string propertyName) { return propertyName.Split('.').Aggregate<string, MemberExpression>(null, (current, property) => Expression.Property(current ?? expr, property)); } } I receive the exception: System.ArgumentException: Instance property 'X' is not defined for type 'IBar' ReSharper turned the code in the link above into the condensed statement in my example. Both forms of the method returned the same error. If I reference IBar.Y the method does not fail.

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  • Windows - put HDD stand-by and sleep mode

    - by iulianchira
    How can I put a hard disk drive in stand-by or sleep mode in Windows, in a programmatic manner. Does the Windows API or any .Net libraries provide any functions to achieve this? (I am aware that I should probably not interfere with Windows's power management mechanism, but this is not something I intend to use in a production environment, it is a proof of concept for some algorithms).

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  • How to compile libsox with MinGW

    - by kaykun
    Hi, I'm trying to use libsox into another program of mine, but I can't seem to compile libsox with MinGW or find any places with working binaries. I downloaded the source from the official site http://sox.sourceforge.net/ but I don't know which files to include in the project to compile it. I can't compile it with all the files included in the 'src' directory and I think I only need to compile the functions listed here: http://sox.sourceforge.net/libsox.html but I can't seem to find it. Can anyone help?

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  • how to call NPP_StreamAsFile

    - by user307635
    Hi I have a plugin.dll which contains this all npp functions I have embeded it in my chrome plugin successfully but I dont know how to call this NPP_StreamAsFile function from my javascript. I dont have any idea. There are so many parameters to pass which I dont have any idea about . please help me. Thanx in advance.

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