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  • Add color to selected <li> item / override <ul> style

    - by Alana
    I have navigation for which I need to set a color for the selected item. It's flat HTML and CSS. Here's the menu code: <ul id="top_navigation"> <li class="border_red"><a href="index.html">Home</a></li> <li class="border_red"><a href="about.html">About</a></li> <li class="border_red"><a href="services.html"><font color="#cf3533">Services</font></a></li> <li class="border_red"><a href="careers.html">Careers</a></li> <li class="border_red"><a href="news.html">News</a></li> <li class="border_red"><a href="sitemap.html">Sitemap</a></li> <li><a href="contact.html">Contact</a></li> </ul> And here's the CSS - there's the basic set up and then a class to put the pipe between the items: #top_navigation { width: 696px; margin: 0px; padding: 0 0 0 4px; list-style-type: none; overflow: hidden; } #top_navigation li { width: auto; height: 17px; margin: 0px; padding: 1px 10px 0 10px; float: left; } #top_navigation li a { margin: 0px; padding: 0px; display: block; font-size: 12px; text-align: center; text-decoration: none; } #top_navigation li a:hover { color: #cf3533; } This sets the pipe on the right. .border_red { border-right: 1px solid #d7d7d7; } I tried combining the two and creating a _selected style, and the pipe shows up, but I can't get the color to change for the selected. I have to be WCAG Priorities 1,2,3-compliant, so I can't just set it manually with .

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  • Center image over background color taken from corner

    - by joebert
    I'm looking for a way that I can take say, a 200x200 pixel image and center it over a background that's 500x500 pixels. The background should be the color of the top-left corner of the 200x200 pixel image. I get the -gravity and -fill flags, but I'm having trouble finding a way to grab that top-left corners color to pass to the -fill flag.

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  • [C++] Parent-Child scheme

    - by rubenvb
    I'm writing a class that holds a pointer to a parent object of the same type (think Qt's QObject system). Each object has one parent, and the parent should not be destroyed when a child is destroyed (obviously). class MyClass { public: MyClass(const MyClass* ptr_parent): parent(parent){}; ~MyClass(){ delete[] a_children; }; private: const MyClass* ptr_parent; // go to MyClass above MyClass* a_children; // go to MyClass below size_t sz_numChildren; // for iterating over a_children } (Excuse my inline coding, it's only for brevity) Will destroying the "Master MyClass" take care of all children? No child should be able to kill it's parent, because I would then have pointers in my main program to destroyed objects, correct? Why might you ask? I need a way to "iterate" through all subdirectories and find all files on a platform independent level. The creation of this tree will be handled by native API's, the rest won't. Is this a good idea to start with? Thanks!

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  • How to assign a numbering scheme to TreeNodes based on position

    - by TChristian
    I have a TreeView control in a Windows Forms application that is displaying my own subclass of TreeNode. I need to display a number along with each node's text indicating its position in the tree, like 1 for the root, 1.1 for its first child, 1.2 for its second child, etc. I'm using C# with .NET 2.0 The best that I can come up with is, after the tree is built, go to each node, recursively find the parent and append the parent's sibling number to the front of the node's text until you reach the root.

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  • Change background color of JQuery slider

    - by DotnetDude
    I understand I can set the background color of the value from min to the current slider selection by doing a: #slider .ui-slider-range { background: #88ac0b; } How do I set the background color for the entire slider (not just from the min or max to the selected value)

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  • changing the color of scroll bar?

    - by udaya
    Hi In a div I gave overflow auto to have a scroll bar to display the content that exceeds the limit My scroll bar appears in blue color that doesn't suit my layout how can i change the color div#navigation{background:#efe9b9; overflow:auto} This is the css i am using ... I want brown colored scrll bar How to get it

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  • Silverlight change color custom control programatically

    - by Mayo
    Hi all, I have this Ellipse which I turned into a custom control so i could animate it programatically. However I am having trouble changing it's color. I know about changing a shapes color like this: aRectangle.Fill = new SolidColorBrush(Colors.Blue); However I cannot do this with a custom control. Anyone know how? Thanks.

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  • grep --color=auto with -i option disables the matching text color, why?

    - by emptyset
    I was messing around with grep and put this in my .zshenv: export GREP_OPTIONS="--color=auto" export GREP_COLORS='mt=1;34' I was bonking my head on the keyboard and changing GREP_COLORS around for a minute trying to figure out why the folder colors were working, but the matching text wasn't. I was doing this: $ grep -R -n -i -e "functionFoo\(" --include=*.cs --exclude-dir=Logs * The line number and file names were set with the default colors, but the matching text wasn't. After spending way too much time, I thought to do this: $ grep -R -n -e "functionFoo\(" --include=*.cs --exclude-dir=Logs * (I removed the -i option.) That's all it took to get the matching text to correctly show up in bold blue. This is a Cygwin on Vista setup, with rxvt running zsh. Any idea why grep colors would break on specifying a case-insensitive match? Update: Under cygwin 1.7, it's a little bit better - case insensitive search works correctly, but it only highlights the word that matches the expression exactly. In other words, "FunctionFoo" highlights "FunctionFoo" but not "functionFoo" and vice versa. Probably a grep issue so I'll be submitting it to that list.

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  • grep --color=auto with -i option disables the matching text color, why?

    - by emptyset
    I was messing around with grep and put this in my .zshenv: export GREP_OPTIONS="--color=auto" export GREP_COLORS='mt=1;34' I was bonking my head on the keyboard and changing GREP_COLORS around for a minute trying to figure out why the folder colors were working, but the matching text wasn't. I was doing this: $ grep -R -n -i -e "functionFoo\(" --include=*.cs --exclude-dir=Logs * The line number and file names were set with the default colors, but the matching text wasn't. After spending way too much time, I thought to do this: $ grep -R -n -e "functionFoo\(" --include=*.cs --exclude-dir=Logs * (I removed the -i option.) That's all it took to get the matching text to correctly show up in bold blue. This is a Cygwin on Vista setup, with rxvt running zsh. Any idea why grep colors would break on specifying a case-insensitive match? Update: Under cygwin 1.7, it's a little bit better - case insensitive search works correctly, but it only highlights the word that matches the expression exactly. In other words, "FunctionFoo" highlights "FunctionFoo" but not "functionFoo" and vice versa. Probably a grep issue so I'll be submitting it to that list.

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  • parsing a list and producing a structure of that

    - by qzar
    ;; structure representing homework points ;; nr: number - the number of the homework ;; points: number - the number of points reached (define-struct homework (nr points)) ;; parse-homework: (list of number pairs) -> (list of homework) ;; The procedure takes a list of number pairs and produces a list of homework structures ;; Example: (parse-homework (list (list 1 6) (list 2 7) (list 3 0))) should produce (list (make-homework 1 6) (make-homework 2 7) (make-homework 3 0)) (define (parse-homework homework-entries) (if (and (= (length (first homework-entries) 2))(= (length (parse-homework (rest homework-entries)) 2))) (make-homework (first homework-entries) (parse-homework (rest homework-entries))) (error 'Non-valid-input "entered list is not of length two")) ) (parse-homework (list (list 1 6) (list 2 7) (list 3 0))) This code produces the error length: expects 1 argument, given 2: (list 1 6) 2 I really appreciate every explanation that you can give me to get in in this scheme-stuff... Thank you very much

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  • Rewriting UNIX cal(1)

    - by dharmatech
    Hello, Today I was testing out SRFI 19 and wrote a simple version of the UNIX cal(1) command. Here's a version in R6RS Scheme which runs in Ikarus and Ypsilon. A few example runs. Schemers: How would you write it? Use your favorite implementation. Ruby and Python: I'm guessing that y'all have elegant date and time libraries. I'm sure you can put the Schemers to shame. ;-) Let's see what ya got. I'd also like to see Haskell and golfed versions. Is there a Stack Overflow tag for re-implementations of UNIX commands? :-) Ed

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  • What does this xkcd code do?

    - by cobbal
    On the xkcd site today, the following appeared as a joke in a <script language="scheme"> tag so what does the following code do / represent? (define (eval exp env) (cond ((self-evaluating? exp) exp) ((variable? exp) (lookup-variable-value exp env)) ((quoted? exp) (text-of-quotation exp)) ((assignment? exp) (eval-assignment exp env)) ((definition? exp) (eval-definition exp env)) ((if? exp) (eval-if exp env)) ((lambda? exp) (make-procedure (lambda-parameters exp) (lambda-body exp) env)) ((begin? exp) (eval-sequence (begin-actions exp) env)) ((cond? exp) (eval (cond->if exp) env)) ((application? exp) (apply (eval (operator exp) env) (list-of-values (operands exp) env))) (else (error "Common Lisp or Netscape Navigator 4.0+ Required" exp))))

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  • Too many argumants for function

    - by Stas Kurilin
    I'm starting learning Lisp with Java background. In SICP's exercise there is many tasks where students should create abstract functions with many parameters, like (define (filtered-accumulate combiner null-value term a next b filter)...) in exercise 3.11. In Java (language with safe, static typing discipline) - method with more than 4 arguments usually smells, but in Lisp/Scheme it doesnt, does it? I'm wandering how many arguments do you use in you functions? If you use it in production, do you make such many layers?

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  • How are vector patterns used in syntax-rules?

    - by Jay
    Hi, I have been writing Common Lisp macros, so Scheme's R5Rs macros are a bit unnatural to me. I think I got the idea, except that I don't understand how one would use vector patterns in syntax-rules: (define-syntax mac (syntax-rules () ((mac #(a b c d)) (let () (display a) (newline) (display d) (newline))))) (expand '(mac #(1 2 3 4))) ;; Chicken's expand-full extension shows macroexpansion => (let746 () (display747 1) (newline748) (display747 4) (newline748)) I don't see how I'd use a macro that requires its arguments to be written as a vector: (mac #(1 2 3 4)) => 1 4 Is there some kind of technique that uses those patterns? Thank you!

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  • Why exactly is eval evil?

    - by Jay
    I know that Lisp and Scheme programmers usually say that eval should be avoided unless strictly necessary. I´ve seen the same recommendation for several programming languages, but I´ve not yet seen a list of clear arguments against the use of eval. Where can I find an account of the potential problems of using eval? For example, I know the problems of GOTO in procedural programming (makes programs unreadable and hard to maintain, makes security problems hard to find, etc), but I´ve never seen the arguments against eval. Interestingly, the same arguments against GOTO should be valid against continuations, but I see that Shemers, for example, won´t say that continuations are "evil" -- you should just be careful when using them. They´re much more likely to frown upon code using eval than upon code using continuations (as far as I can see -- I could be wrong).

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  • Newbie programmer looking for a fun, small project (pref. C++/Python)

    - by Francisco P.
    Hello everyone, I have some experience in Scheme and C++ (read: a semester of each) I know the very basics of Python (used it for physics simulations with the Visual Python module). Can you recommend me some fun and small (i.e. don't take much time) projects on either Python or C++? I have no real preferences, just that it is fun :P Thanks for your time! PS: I've tried projecteuler and python challenge. Euler is good, but more about math than coding, and py challenge just didn't work for me.

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  • Experiences teaching or learning map/reduce/etc before recursion?

    - by Jay
    As far as I can see, the usual (and best in my opinion) order for teaching iterting constructs in functional programming with Scheme is to first teach recursion and maybe later get into things like map, reduce and all SRFI-1 procedures. This is probably, I guess, because with recursion the student has everything that's necessary for iterating (and even re-write all of SRFI-1 if he/she wants to do so). Now I was wondering if the opposite approach has ever been tried: use several procedures from SRFI-1 and only when they are not enough (for example, to approximate a function) use recursion. My guess is that the result would not be good, but I'd like to know about any past experiences with this approach.

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  • Definition of "lisp form"?

    - by josh
    Hi, What exactly the definition of a "Lisp form"? As far as I know, it's "either an atom or a list that has a symbol as its first element". But then, this (in Scheme) would not be a form: ((lambda () 42)) ;; The answer to Life, the Universe and Everything. Because the first element of the list is itself another list. And after it's evaluated it will be a procedure (not a symbol). I can find several different websites and tutorials talking about Lisp forms, but none which gives a complete and detailed definition. Where can I find one?

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  • Writing lambda functions in Scala

    - by user2433237
    I'm aware that you can write anonymous functions in Scala but I'm having trouble trying to convert a piece of code from Scheme. Could anyone help me convert this to Scala? (define apply-env (lambda (env search-sym) (cases environment env (empty-env () (eopl:error 'apply-env "No binding for ~s" search-sym)) (extend-env (var val saved-env) (if (eqv? search-sym var) val (apply-env saved-env search-sym))) (extend-env-rec (p-name b-var p-body saved-env) (if (eqv? search-sym p-name) (proc-val (procedure b-var p-body env)) (apply-env saved-env search-sym)))))) Thanks in advance

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  • Extra line breaks inserted in MrEd text%

    - by Jesse Millikan
    In a DrScheme project, I'm using a MrEd editor-canvas% with text% and inserting a string from a literal in a Scheme file. This results in an extra blank line in the editor for each line of text I'm trying to insert. Is this a Windows vs. Unix linebreak problem? I can't find anything about text% treats line breaks in the documentation. ; Inside a class definition: (define/public (edit-pattern p j b d h) (send input-beat set-value (number->string b)) (send input-dwell set-value (number->string d)) (send hold-beats set-value (number->string h)) (send juggler-t erase) ; Why do these add extra newlines (send juggler-t insert j) (send pattern-t erase) (send pattern-t insert p)) (define juggler-ec (new editor-canvas% [parent this] [line-count 12])) (define juggler-t (new text%)) (send juggler-ec set-editor juggler-t) (define pattern-ec (new editor-canvas% [parent this] [line-count 20])) (define pattern-t (new text%)) (send pattern-ec set-editor pattern-t) ; Lots of other stuff...

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  • how to change UITabbar selected color?

    - by RAGOpoR
    according to this post for now, Is apple will also reject this code? and how to implement what apple will approve? @interface UITabBar (ColorExtensions) - (void)recolorItemsWithColor:(UIColor *)color shadowColor:(UIColor *)shadowColor shadowOffset:(CGSize)shadowOffset shadowBlur:(CGFloat)shadowBlur; @end @interface UITabBarItem (Private) @property(retain, nonatomic) UIImage *selectedImage; - (void)_updateView; @end @implementation UITabBar (ColorExtensions) - (void)recolorItemsWithColor:(UIColor *)color shadowColor:(UIColor *)shadowColor shadowOffset:(CGSize)shadowOffset shadowBlur:(CGFloat)shadowBlur { CGColorRef cgColor = [color CGColor]; CGColorRef cgShadowColor = [shadowColor CGColor]; for (UITabBarItem *item in [self items]) if ([item respondsToSelector:@selector(selectedImage)] && [item respondsToSelector:@selector(setSelectedImage:)] && [item respondsToSelector:@selector(_updateView)]) { CGRect contextRect; contextRect.origin.x = 0.0f; contextRect.origin.y = 0.0f; contextRect.size = [[item selectedImage] size]; // Retrieve source image and begin image context UIImage *itemImage = [item image]; CGSize itemImageSize = [itemImage size]; CGPoint itemImagePosition; itemImagePosition.x = ceilf((contextRect.size.width - itemImageSize.width) / 2); itemImagePosition.y = ceilf((contextRect.size.height - itemImageSize.height) / 2); UIGraphicsBeginImageContext(contextRect.size); CGContextRef c = UIGraphicsGetCurrentContext(); // Setup shadow CGContextSetShadowWithColor(c, shadowOffset, shadowBlur, cgShadowColor); // Setup transparency layer and clip to mask CGContextBeginTransparencyLayer(c, NULL); CGContextScaleCTM(c, 1.0, -1.0); CGContextClipToMask(c, CGRectMake(itemImagePosition.x, -itemImagePosition.y, itemImageSize.width, -itemImageSize.height), [itemImage CGImage]); // Fill and end the transparency layer CGContextSetFillColorWithColor(c, cgColor); contextRect.size.height = -contextRect.size.height; CGContextFillRect(c, contextRect); CGContextEndTransparencyLayer(c); // Set selected image and end context [item setSelectedImage:UIGraphicsGetImageFromCurrentImageContext()]; UIGraphicsEndImageContext(); // Update the view [item _updateView]; } } @end

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