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• Convolving two signals

  - by John Elway

  Calculate the convolution of the following signals (your answer will be in the form of an equation): h[n] = delta[n-1] + delta[n+1], x[n] = delta[n-a] + delta[n+b] I'm lost as to what I do with h and x. Do I simply multiply them? h[n]*x[n]? I programmed convolution with several types of blurs and edge detectors, but I don't see how to translate that knowledge to this problem. please help!

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• power function in blackberry

  - by Rahul Varma

  Hi, I desperately need a solution for this... I m using Blackberry JDE 5.0. In documentation it shows net.rim.device.api.util.MathUtilities.pow ( double double ) is added form 4.6. But i couldnt get pow function when i use Math.pow(). I need to get this value...float fSecondFactor=(float) (Math.pow(1+fRatePerMonth,fNumberofMonths)-1); Can anyone tell me how to achieve this...Plzz....

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• Icons/graphics for your applications

  - by rein

  I need to source some graphics/icons for my application I'm writing (Windows WinForms). I need graphics for toolbar buttons, icons for form headers and graphics for wizard dialog boxes. As a last resort I'm willing to create them myself - a move that might make them (and my whole application) look amazingly bad. What are some good sources (free or not) where I can get these kinds of programmer icons? I'd like the icons to be at least 32x32 256 color.

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• Animating elements of text-shadow with jQuery

  - by bryceroney

  I was wondering if there was any way to, using jQuery, animate properties of text-shadow like size or colour. It's annoying that there aren't individual properties like text-shadow-color instead of the statement only being available in combined form.

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• Return value from query statement - jQuery

  - by dave

  Hello, I have a ajax, jquery form which works fine, but returning a message from <div></div>. I want to return a value from a db query, a single value. How do I go about doing it. Thanks Dave

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• Is there any MS SQL database designer software like MySQL workbench?

  - by newbie

  I need to design database for MS SQL Server, is there any MySQL workbench like software for that? I have access to MSDN, so it can also be commercial product that can be found form MSDN.

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• assign a model's attribute through association

  - by justcode

  I'm new to rails and working on a rails app and I'm stuck pondering this issue. I have three models class product < ActiveRecord::Base attr_accessible :name, :issn, :category validates_presence_of :name, :issn, :category validates_numericality_of :issn, :message => "has to be a number" has_many :user_products has_many :users, :through => :user_products end class UserProduct < ActiveRecord::Base attr_accessible :price, :category validates_presence_of :price, :category validates_numericality_of :price, :message = "has to be a number" belongs_to :user belongs_to :product end class user < ActiveRecord::Base # devise authentication here # Setup accessible (or protected) attributes for your model attr_accessible :email, :password, :password_confirmation, :remember_me has_many :user_products has_many :products, :through = :user_products end here is my new.html.erb <div class="MainBodyWrapper"> <div class="span8"> <div id="listBoxWrapper"> <fieldset> <%= form_for(@product, :html => { :class => "form-inline" }, :style => "margin-bottom: 60px" ) do |f| %> <div class="control-group"> <label class="control-label" for="name">name</label> <div class="controls"> <%= f.text_field :price, :class => 'input-xlarge input-name', :id => "name" %> </div> </div> <div class="listingButtons"> <button class="btn btn-info"></i>Add</button> <a class="btn">Upload Pictures (anytime)</a> </div> </fieldset> </div> </div> There are reasons why I want to setup the models this way. So the question is this: I want the user to enter the info for the product in the form but it also involves putting in the price of the product which exists in a different model/table (user_product) that is associated with product. How can I do this? You can see that my form_for uses @product. Any help will be appreciated.

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• Regex in JavaScript

  - by dfjhdfjhdf

  Suppose we don't know how many slashes we could get in a string but we do not want any extra slashes. So if we get this string '/hello/world///////how/are/you//////////////' we should transform it to the form of '/hello/world/how/are/you/'. How to do it with the help of regular expressions in JavaScript?

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• Error creating new user by Admin

  - by rahul

  I am creating a web application using Form Authentication of Asp.Net with C# and back end Sql Server. Here in my application administrator login and creates new users. I am using the create user wizard under login controls. My problem is when the new user is created by Admin he is automatically logged out and logged in with new user credentials which he has just created. Any help would be highly appreciated.

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• jQuery + sexy alerts + javascript menus

  - by BibiBuBu

  Good Day! i am working on page which has Javascript Menus (dont know how made, i think they are in compressed form) Jquery Sexy Alerts now my problem is that when i want to add any type of jquery calender, it wont work :(, i have tried different possibilities found here, but yet invain. Can somebody guide me. OR some body give me suggestion to use a calender that is compatible with any other framework. help is appreciated. Thanks

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• How do I take a ByteArrayInputStream and have its contents saved as a file on the filesystem

  - by Ankur

  I have an image which is in the form of a ByteArrayInputStream. I want to take this and make it something that I can save to a location in my filesystem. I've been going around in circles, could you please help me out.

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• Email Address Validation for ASP.NET

  - by Brian G

  What do you use to validate an email address on a ASP.NET form. I want to make sure that it contains no XSS exploits. This is ASP.NET 1.1

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• Regexs in Ruby getting filename

  - by user1290757

  i am extracting file names of html files using line: filename = File.basename(input_filename, ".*") which currently prints full file name excluding .html extension All files are stored in the form of http^x.x.edu^1^2 all file names begin with http^ and contain edu^ what i want is to extract 2 (which changes) but it is always the second element after .edu I have attempted destructive gsub! but i m weak with regular expressions.

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• HTML forms and passing data back

  - by coLOLtip

  My html form is spreading over several pages (steps), and I want to let the use to take step back in case they would like to change something they filled in. So, I don't want to make users re-type all the information they already have typed once. Thus, how would I make it so that all the information would go back, to speak so? (I use PHP on server-side.)

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• How to iterate over an dictionary without knowing the keys, while getting key and object?

  - by dontWatchMyProfile

  I have an NSDictionary and want to iterate over the objects. But at the same time, I need to know the key of the dictionary. I remember there was a special, fancy form of fast enumeration, but have forgotten the exact syntax. Anyone?

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• lwuit container

  - by user267674

  i have added a container named btnBar with boxlayout(x-axis) on a form. the container has 4 buttons of custom class MyButton that extends from Button itself.when i add actionlistener to one of the buttons in the container it gets invoked for each n every button.Even the actionevent.getsource.gettext method returns the same value irrespective of the focus.i hav added the buttons thru an array and m trying to use is smthng lyk dis....btns[0].addActionListener(......)......where m i going wrong...plz lemme kw..

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• CakePHP: Field label in model

  - by blackliteon

  Are there any approaches to set in model field label? I dont want use 'label' property in form helper.

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• How can I check the MIME type of an uploaded file using Perl CGI?

  - by FOOM

  I'm trying to get the MIME type of an <input type="file" /> element using Perl, but without actually examining the contents of the file itself, In other words, just using the HTTP headers. I have only been able to get the "multipart/form-type" Content-Type value, but my understanding is that each element will get its own MIME Type? How can I see the sub-MIME types using Perl?

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• How can I display a list of characters that fail to match a regular expression?

  - by Matt

  For example, if I'm doing some form input validation and I'm using the following code for the name field. preg_match("/^[a-zA-Z .-]$/", $firstname); If someone types in Mr. (Awkward) Double-Barrelled I want to be able to display a message saying Invalid character(s): (, )

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• Why does every third party control set rewrite the basics of ASP.Net?

  - by Earlz

  Of the control sets I've seen for ASP.Net they all exhibit a strange property. They rewrite everything in the ASP.Net control set. For instance both DevExpress and Telerik have their own Panel, Label, and UpdatePanel controls among others. Why do vendors do this? Is it just to create a form of lock in or is it actually necessary?

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• access textarea value

  - by Espen Arnoy

  I have a on a form of mine. I´m trying to reset the value (the value typed by the user) of this field on a certain event. However, I seem unable to access it both with .val() and .html(). Any advice on this?

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• JQuery remove .append after 5 seconds

  - by RussP

  Oh gosh here a lot today - oops Folks, best way to do this: $j('.done').append('Your services have been updated'); (that bits done) but then remove the append after say 5 seconds so that if a person resubmits a form(allowed) the append does not continue adding the text? i.e updated once "Your services have been updated", twice would read "Your services have been updated Your services have been updated" but I would only want Your services have been updated to show once

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• How to Get GPS location from the web browser

  - by Ganesh

  Hi every one, I am developing a mobile based web-site, there i have intigrated google maps, i need to fill the 'From' field of google maps dynamically. Is it possible to get the 'GPS' location form web-browser and fill it up in the 'From' field of a google map dynamically.

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• C# Drawing 2D objects with events

  - by Keeper

  I need to draw several simple objects (polygons composed by lines and arcs, eventually placed on different layers) inside a form (or any other container) and then handle events like: right click on object zoom pan Is there a library/framework that can handle my need or do I need to create my own?

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• Accessing the Address Book in iPhone OS

  - by PF1

  Hi Everyone: I'm wondering if someone could direct me to an article that explains how to access the address book contacts in the form that Address Book on the desktop can read. Thanks for any help!

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