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  • PHP preg_match to get function-like string

    - by pistacchio
    Hi to all, if I have a string like 'foo(bar)', with the following code i can almost parse it the way i want: $results = array(); preg_match( "/\w*(?=(\(.*\))?)/", 'foo(bar)', &$results ); print_r($results); /* Array ( [0] => foo [1] => (bar) ) */ How can I modify the regex to have bar instead of (bar)? Thanks

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  • Dropdown selection navigation to different page with dropdown values; Asp.Net + Javascript

    - by fzshah76
    I want to access drop down menu's variable in java script on change event, here is my code <asp:DropDownList ID="DropDownList1" runat="server" onchange="document.location.href = url_Lookbook;" > <asp:ListItem Value="0">hello</asp:ListItem> <asp:ListItem Value="1">world</asp:ListItem> </asp:DropDownList> here is the script coding: <script type="text/javascript"> var url_Lookbook = "http://microsoft.com"; </script> My question is how do I pass down value=0 or value = 1 to different page, any help is appreciated.

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  • Classes within classes in PHP

    - by Matt
    Can you do this in PHP? I've heard conflicting opinions: Something like: Class bar { function a_function () { echo "hi!"; } } Class foo { public $bar; function __construct() { $this->bar = new bar(); } } $x = new foo(); $x->bar->a_function(); Will this echo "hi!" or not?

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  • How can I have multiple navigation paths with Django, like a simplifies wizard path and a full path?

    - by Zeta
    Lets say I have an application with a structure such as: System set date set name set something Other set death ray target calibrate and I want to have "back" and "next" buttons on a page. The catch is, if you're going in via the "wizard", I want the nav path to be something like "set name" - "set death ray target" - "set name". If you go via the Advanced options menu, I want to just iterate options... "set date" - "set name" - "set something" - "set death ray target" - calibrate. So far, I'm thinking I have to use different URIs, but that's that. Any ideia how this could be done? Thanks.

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  • Multiple instance_of?

    - by c00lryguy
    How would I make Object#instance_of? accept multiple arguments so that something like the below example would work? class Foo; end class Bar; end class Baz; end my_foo = Foo.new my_bar = Bar.new my_baz = Baz.new my_foo.instance_of?(Foo, Bar) # => true my_bar.instance_of?(Foo, Bar) # => true my_baz.instance_of?(Foo, Bar) # => false

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  • How to make the tabbar view appear when parsing is done in iphone?

    - by Warrior
    I am new to iphone development.I created a application , in which the first tab bar view ,load a web page and in second tab bar view ,it parses a xml file and display the content in the table view. When i click the second tab bar, the tab bar view is seen only after the parsing is done, till the parsing time the tab bar appears like unselected.I want to display the tabbar view with activity indicator when the parsing is done.How can i achieve it.Please help me out.Thanks.

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  • Ruby parse order

    - by bresc
    Hi, given this code: class Foo def bar return Bar.new end end class Bar ... end I get this error: NameError: uninitialized constant Bar This obviously works if I put Bar before Foo but that is not a real solution though. Any ideas on how to solve this without considering the order? Many thanks.

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  • How do I center my navigation bar and background?

    - by user2892958
    nav-wrap { background:url(nav-bg-blue.png) no-repeat top center; height:39px; padding-top:3px; } .no-header-page #nav-wrap { background:url(nav-bg-nobanner-blue.png) no-repeat top center; height:43px; padding-top:4px; margin-bottom:30px; } #nav-wrap .container { clear: both; overflow: hidden; position:center; width:100%; } #nav-wrap .container ul { list-style: none; float: center; } #nav-wrap .container ul li { list-style: none; float: left; background:url(nav-right-last.png) no-repeat top right; padding-right:20px; margin-left:-10px; position:auto; } #nav-wrap .container ul span li { background:url(nav-right-last.png) no-repeat top right; } #nav-wrap .container ul li a { float: center; display: block; font-family: 'News Cycle', sans-serif; color: #fff; text-decoration: none; padding: 5px 10px 8px 20px; border: 0; outline: 0; list-style-type: none; font-size: 14px; text-transform:uppercase; letter-spacing:2px; background:url(nav-left-first.png) no-repeat top left; line-height:25px; text-shadow:0 -1px 2px rgba(0,0,0,0.3); } #nav-wrap .container ul li#active, #nav-wrap .container ul li:hover{ background:url(nav-hover-right-last-brown-red.png) no-repeat topright; z-index:1; } #nav-wrap .container ul li:hover a, #nav-wrap .container ul li#active a, #nav-wrap .container ul li a:hover { border: 0; background:url(nav-hover-left-brown-red.png) no-repeat top left; } .wsite-nav-0 { margin-left:0 !important`` }

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  • Ubuntu 12.10 Jerky mouse movments

    - by Bar Hofesh
    As the Title indicates I have some problem with delicate movement of the mouse in Ubuntu 12.10 fresh installation. The jerkiness is shown more at small and slow movements when the mouse will move a 2 millimeters to any random positions every 5 centimeters of movements. my mouse is a Microsoft Sidewinder Gaming mouse. is there any driver I can use to fix it or any configuration? this is happening both in unity or inside games and programs.

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  • Combine the Address & Search Bars in Firefox

    - by Asian Angel
    The Search Bar in Firefox is very useful for finding additional information or images while browsing but the UI space it takes up can be frustrating at times. Now you can reclaim that UI space and still have access to all that searching goodness with the Foobar extension. Note: This is about the Foobar Firefox extension and not to be confused with Foobar2000 the open source music player. Before If you have the “Search Bar” displayed there is no doubt that it is taking up valuable space in your browser’s UI. What you need is the ability to reclaim that UI space and still have the same access to your search capability as before…no more sacrificing one for a gain with the other. After As soon as you have installed the extension you can see that the top part of your browser will look much sleeker without the “Search Bar” to clutter it up. The “Search Engine Icon” will now be visible inside of your “Address Bar” as seen here. You will be able to access the same “Search Engine Menu” as before by clicking on the “Search Engine Icon”. There are two display modes for search results (setting available in the “Options”). The first one shown here is “Simple Mode” where all results are in a condensed format. Notice that not only are there search suggestions but also “Bookmarks & History” listings as well. You can literally get the best of both when conducting a search. Note: The number of entries for search suggestions and bookmark/history listings can be adjusted higher or lower in the “Options”. The second one is “Rich Mode” where the results are shown with more details. Choose the “mode” that best suits your personal style. For our first example you can see the results when we conducted a quick search on “Windows 7” (using the first of the three offerings shown from Bing). Our second example was a search for “Flowers” using our Photobucket search engine. Once again nice results opened in a new tab for us. Options The options are easy to go through. It is really nice to be able to choose the number of results that you want displayed and the format that you want them shown in. Note: Changing the “Suggestion popup style” will require a browser restart to take effect. Conclusion If you love using the “Search Bar” in Firefox but want to reclaim the UI space then you will definitely want to add this extension to your browser. The ability to customize the number of results and choose the formatting make this extension even better. Links Download the Foobar extension (Mozilla Add-ons) Similar Articles Productive Geek Tips Combine the Address Bar and Progress Bar Together in FirefoxHide Some or All of the GUI Bars in FirefoxEnable Partial Match AutoComplete in the Firefox Address BarQuick Firefox UI TweaksAdd Search Forms to the Firefox Search Bar TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips Revo Uninstaller Pro Registry Mechanic 9 for Windows PC Tools Internet Security Suite 2010 PCmover Professional Scan your PC for nasties with Panda ActiveScan CleanMem – Memory Cleaner AceStock – The Personal Stock Monitor Add Multiple Tabs to Office Programs The Wearing of the Green – St. Patrick’s Day Theme (Firefox) Perform a Background Check on Yourself

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  • Default Parameters vs Method Overloading

    - by João Angelo
    With default parameters introduced in C# 4.0 one might be tempted to abandon the old approach of providing method overloads to simulate default parameters. However, you must take in consideration that both techniques are not interchangeable since they show different behaviors in certain scenarios. For me the most relevant difference is that default parameters are a compile time feature while method overloading is a runtime feature. To illustrate these concepts let’s take a look at a complete, although a bit long, example. What you need to retain from the example is that static method Foo uses method overloading while static method Bar uses C# 4.0 default parameters. static void CreateCallerAssembly(string name) { // Caller class - Invokes Example.Foo() and Example.Bar() string callerCode = String.Concat( "using System;", "public class Caller", "{", " public void Print()", " {", " Console.WriteLine(Example.Foo());", " Console.WriteLine(Example.Bar());", " }", "}"); var parameters = new CompilerParameters(new[] { "system.dll", "Common.dll" }, name); new CSharpCodeProvider().CompileAssemblyFromSource(parameters, callerCode); } static void Main() { // Example class - Foo uses overloading while Bar uses C# 4.0 default parameters string exampleCode = String.Concat( "using System;", "public class Example", "{{", " public static string Foo() {{ return Foo(\"{0}\"); }}", " public static string Foo(string key) {{ return \"FOO-\" + key; }}", " public static string Bar(string key = \"{0}\") {{ return \"BAR-\" + key; }}", "}}"); var compiler = new CSharpCodeProvider(); var parameters = new CompilerParameters(new[] { "system.dll" }, "Common.dll"); // Build Common.dll with default value of "V1" compiler.CompileAssemblyFromSource(parameters, String.Format(exampleCode, "V1")); // Caller1 built against Common.dll that uses a default of "V1" CreateCallerAssembly("Caller1.dll"); // Rebuild Common.dll with default value of "V2" compiler.CompileAssemblyFromSource(parameters, String.Format(exampleCode, "V2")); // Caller2 built against Common.dll that uses a default of "V2" CreateCallerAssembly("Caller2.dll"); dynamic caller1 = Assembly.LoadFrom("Caller1.dll").CreateInstance("Caller"); dynamic caller2 = Assembly.LoadFrom("Caller2.dll").CreateInstance("Caller"); Console.WriteLine("Caller1.dll:"); caller1.Print(); Console.WriteLine("Caller2.dll:"); caller2.Print(); } And if you run this code you will get the following output: // Caller1.dll: // FOO-V2 // BAR-V1 // Caller2.dll: // FOO-V2 // BAR-V2 You see that even though Caller1.dll runs against the current Common.dll assembly where method Bar defines a default value of “V2″ the output show us the default value defined at the time Caller1.dll compiled against the first version of Common.dll. This happens because the compiler will copy the current default value to each method call, much in the same way a constant value (const keyword) is copied to a calling assembly and changes to it’s value will only be reflected if you rebuild the calling assembly again. The use of default parameters is also discouraged by Microsoft in public API’s as stated in (CA1026: Default parameters should not be used) code analysis rule.

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  • What are the right reverse PTR, domain keys, and SPF settings for two domains running the same appli

    - by James A. Rosen
    I just read Jeff Atwood's recent post on DNS configuration for email and decided to give it a go on my application. I have a web-app that runs on one server under two different IPs and domain names, on both HTTP and HTTPS for each: <VirtualHost *:80> ServerName foo.org ServerAlias www.foo.org ... </VirtualHost> <VirtualHost 1.2.3.4:443> ServerName foo.org ServerAlias www.foo.org </VirtualHost> <VirtualHost *:80> ServerName bar.org ServerAlias www.bar.org ... </VirtualHost> <VirtualHost 2.3.4.5:443> ServerName bar.org ServerAlias www.bar.org </VirtualHost> I'm using GMail as my SMTP server. Do I need the reverse PTR and SenderID records? If so, do I put the same ones on all of my records (foo.org, www.foo.org, bar.org, www.bar.org, ASPMX.L.GOOGLE.COM, ASPMX2.GOOGLEMAIL.COM, ..)? I'm pretty sure I want the domain-keys records, but I'm not sure which domains to attach them to. The Google mail servers? foo.org and bar.org? Everything?

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  • Textmate add multiline text at end of line

    - by Yuval
    In Textmate, I am able to add text to several lines at once by clicking and holding the Option key and dragging with the mouse. say I have the following lines: foo 1: foo 2: foo 3: I can easily click and hold option and then drag down with the lines to select the text at the end of each line, and then type "bar" once and it will be added to all lines, as such: foo 1: bar foo 2: bar foo 3: bar Fantastic. The problem I run into, is when my lines aren't the same length, as such foo 19: foo 37842342346: foo 503: Now if I want to add text to the end of each line, I have to either do it manually, or choose enough space so that the longest line is not overwritten, as such: foo 19: bar foo 37842342346: bar foo 503: bar This results in a lot of unwanted whitespace in lines that don't need it. Granted, I could easily run a regular expression search to replace all multiple occurrences of a space with a single one, but I was wondering if there's a way to select all ending of lines at once without having to do that. Any idea? Thanks!

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  • Textmate add multiline text at end of line

    - by Yuval
    In Textmate, I am able to add text to several lines at once by clicking and holding the Option key and dragging with the mouse. say I have the following lines: foo 1: foo 2: foo 3: I can easily click and hold option and then drag down with the lines to select the text at the end of each line, and then type "bar" once and it will be added to all lines, as such: foo 1: bar foo 2: bar foo 3: bar Fantastic. The problem I run into, is when my lines aren't the same length, as such foo 19: foo 37842342346: foo 503: Now if I want to add text to the end of each line, I have to either do it manually, or choose enough space so that the longest line is not overwritten, as such: foo 19: bar foo 37842342346: bar foo 503: bar This results in a lot of unwanted whitespace in lines that don't need it. Granted, I could easily run a regular expression search to replace all multiple occurrences of a space with a single one, but I was wondering if there's a way to select all ending of lines at once without having to do that. Any idea? Thanks!

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  • Windows Not Honoring DHCP Scope

    - by jerhinesmith
    Please bear with me as I'm not a networking person by trade. Our current configuration at work includes two Windows Servers serving as DHCP/Active Directory servers (if that makes sense) -- one replicating from the other. On both machines, the DNS resolution is set up as: Main Windows Box (10...* address) Public IP Address (for Verizon) Public IP Address (secondary Verizon) Secondary Windows Box (10...* address) Assuming our domain is foo.com, we maintain the foo.com website on a hosted VPS with it's own IP address. The problem is that even though bar.foo.com is an internal server and is defined in DNS on the Primary Windows machine, when I ping bar or even bar.foo.com it resolves to the hosted IP address instead of the 10.* address. I tried taking both of the Public IP addresses out of the DHCP scope, and that seemed to work, but it completely slowed down access to any external sites, so that wasn't acceptable. I also tried adding the two Windows machine as the DNS servers on my desktop. That too worked, but I'd rather not have everything enter their DNS servers, as the above setup should theoretically be working. Is there anything I could check to see why pinging bar.foo.com isn't resolving to the DNS entry on the Windows machines? Here's a summary of the ping results, if they help: Pinging from servers with static IP bar.foo.com resolves with correct IP address Pinging from linux machines not joined to the domain bar.foo.com resolves with correct IP address Pinging from user's desktop machines, joined to the domain, but dynamic IP bar.foo.com resolves with incorrect IP address This is driving me crazy!

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  • UINavigationController with UIView and UITableView

    - by Tobster
    I'm creating a navigation-based app which displays a graph, rendered with openGL, and a tableview listing disclosure buttons of all of the elements that are displayed on the graph, and a settings disclosure button. The navigation controller is also a tableview delegate and datasource, and the tableview is added to the view programatically and has its' delegate and datasource set to 'self'. The OpenGL based graph view is added via IB. The problem I'm having is that I'm trying to push a view controller (either settings or graph element properties) within the didSelectRowAtIndexPath method. The method registers and the new view is pushed on, but the tableview stays and obscures part of the view that was pushed on, as if it has a different navigation controller. I can't seem to set the tableview's navigation controller to be the same as the rest of the UINavigationControllers' view. Does anyone know how I could fix this? My navigation controllers' initWithCoder method, where the tableview is added, appears as follows: elementList = [[UITableView alloc] initWithFrame:tableFrame style:UITableViewStyleGrouped]; elementList.dataSource = self; elementList.delegate = self; [self.view addSubview:elementList]; Further in the source file, the DidSelectRowAtIndexPath method where the navigation controller is pushed appears as follows: Settings* Controller = [[Settings alloc] init]; [self pushViewController:Controller animated:YES]; [Controller release];

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  • Having difficulties in ending Michael Hartl's tutorial. Help?

    - by konzepz
    Following Michael Hartl's (amazing) Ruby on Rails Tutorial, on the final section, I get the following errors: 1) User micropost associations status feed should include the microposts of followed users Failure/Error: @user.feed.should include(mp3) expected [#<Micropost id: 2, content: "Foo bar", user_id: 1, created_at: "2011-01-12 21:22:41", updated_at: "2011-01-12 22:22:41">, #<Micropost id: 1, content: "Foo bar", user_id: 1, created_at: "2011-01-11 22:22:41", updated_at: "2011-01-12 22:22:41">] to include #<Micropost id: 3, content: "Foo bar", user_id: 2, created_at: "2011-01-12 22:22:41", updated_at: "2011-01-12 22:22:41"> Diff: @@ -1,2 +1,2 @@ -#<Micropost id: 3, content: "Foo bar", user_id: 2, created_at: "2011-01-12 22:22:41", updated_at: "2011-01-12 22:22:41"> +[#<Micropost id: 2, content: "Foo bar", user_id: 1, created_at: "2011-01-12 21:22:41", updated_at: "2011-01-12 22:22:41">, #<Micropost id: 1, content: "Foo bar", user_id: 1, created_at: "2011-01-11 22:22:41", updated_at: "2011-01-12 22:22:41">] # ./spec/models/user_spec.rb:214 2) Micropost from_users_followed_by should include the followed user's microposts Failure/Error: Micropost.from_users_followed_by(@user).should include(@other_post) expected [#<Micropost id: 1, content: "foo", user_id: 1, created_at: "2011-01-12 22:22:46", updated_at: "2011-01-12 22:22:46">] to include #<Micropost id: 2, content: "bar", user_id: 2, created_at: "2011-01-12 22:22:46", updated_at: "2011-01-12 22:22:46"> Diff: @@ -1,2 +1,2 @@ -#<Micropost id: 2, content: "bar", user_id: 2, created_at: "2011-01-12 22:22:46", updated_at: "2011-01-12 22:22:46"> +[#<Micropost id: 1, content: "foo", user_id: 1, created_at: "2011-01-12 22:22:46", updated_at: "2011-01-12 22:22:46">] # ./spec/models/micropost_spec.rb:75 Finished in 9.18 seconds 153 examples, 2 failures Seems like mp3 is not included in the feed. Any ideas on how to fix it? Or where to look for possible errors in the code? I compared the files with Hartl's original code; seems exact. Thanks.

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  • How to pass a function in a function?

    - by SoulBeaver
    That's an odd title. I would greatly appreciate it if somebody could clarify what exactly I'm asking because I'm not so sure myself. I'm watching the Stanford videos on Programming Paradigms(that teacher is awesome) and I'm up to video five when he started doing this: void *lSearch( void* key, void* base, int elemSize, int n, int (*cmpFn)(void*, void*)) Naturally, I thought to myself, "Oi, I didn't know you could declare a function and define it later!". So I created my own C++ test version. int foo(int (*bar)(void*, void*)); int bar(void* a, void* b); int main(int argc, char** argv) { int *func = 0; foo(bar); cin.get(); return 0; } int foo(int (*bar)(void*, void*)) { int c(10), d(15); int *a = &c; int *b = &d; bar(a, b); return 0; } int bar(void* a, void* b) { cout << "Why hello there." << endl; return 0; } The question about the code is this: it fails if I declare function int *bar as a parameter of foo, but not int (*bar). Why!? Also, the video confuses me in the fact that his lSearch definition void* lSearch( /*params*/ , int (*cmpFn)(void*, void*)) is calling cmpFn in the definition, but when calling the lSearch function lSearch( /*params*/, intCmp ); also calls the defined function int intCmp(void* elem1, void* elem2); and I don't get how that works. Why, in lSearch, is the function called cmpFn, but defined as intCmp, which is of type int, not int* and still works? And why does the function in lSearch not have to have defined parameters?

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  • volatile keyword seems to be useless?

    - by Finbarr
    import java.util.concurrent.CountDownLatch; import java.util.concurrent.atomic.AtomicInteger; public class Main implements Runnable { private final CountDownLatch cdl1 = new CountDownLatch(NUM_THREADS); private volatile int bar = 0; private AtomicInteger count = new AtomicInteger(0); private static final int NUM_THREADS = 25; public static void main(String[] args) { Main main = new Main(); for(int i = 0; i < NUM_THREADS; i++) new Thread(main).start(); } public void run() { int i = count.incrementAndGet(); cdl1.countDown(); try { cdl1.await(); } catch (InterruptedException e1) { e1.printStackTrace(); } bar = i; if(bar != i) System.out.println("Bar not equal to i"); else System.out.println("Bar equal to i"); } } Each Thread enters the run method and acquires a unique, thread confined, int variable i by getting a value from the AtomicInteger called count. Each Thread then awaits the CountDownLatch called cdl1 (when the last Thread reaches the latch, all Threads are released). When the latch is released each thread attempts to assign their confined i value to the shared, volatile, int called bar. I would expect every Thread except one to print out "Bar not equal to i", but every Thread prints "Bar equal to i". Eh, wtf does volatile actually do if not this?

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  • [Ruby] Object assignment and pointers

    - by Jergason
    I am a little confused about object assignment and pointers in Ruby, and coded up this snippet to test my assumptions. class Foo attr_accessor :one, :two def initialize(one, two) @one = one @two = two end end bar = Foo.new(1, 2) beans = bar puts bar puts beans beans.one = 2 puts bar puts beans puts beans.one puts bar.one I had assumed that when I assigned bar to beans, it would create a copy of the object, and modifying one would not affect the other. Alas, the output shows otherwise. ^_^[jergason:~]$ ruby test.rb #<Foo:0x100155c60> #<Foo:0x100155c60> #<Foo:0x100155c60> #<Foo:0x100155c60> 2 2 I believe that the numbers have something to do with the address of the object, and they are the same for both beans and bar, and when I modify beans, bar gets changed as well, which is not what I had expected. It appears that I am only creating a pointer to the object, not a copy of it. What do I need to do to copy the object on assignment, instead of creating a pointer? Tests with the Array class shows some strange behavior as well. foo = [0, 1, 2, 3, 4, 5] baz = foo puts "foo is #{foo}" puts "baz is #{baz}" foo.pop puts "foo is #{foo}" puts "baz is #{baz}" foo += ["a hill of beans is a wonderful thing"] puts "foo is #{foo}" puts "baz is #{baz}" This produces the following wonky output: foo is 012345 baz is 012345 foo is 01234 baz is 01234 foo is 01234a hill of beans is a wonderful thing baz is 01234 This blows my mind. Calling pop on foo affects baz as well, so it isn't a copy, but concatenating something onto foo only affects foo, and not baz. So when am I dealing with the original object, and when am I dealing with a copy? In my own classes, how can I make sure that assignment copies, and doesn't make pointers? Help this confused guy out.

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  • KnockoutJS - creating object doesn't work

    - by Kiwanax
    I'm doing a navigation list with menus and submenus. I have the following structure: function Menu(navigation) { this.NavigationUrl = ko.observable(navigation.NavigationUrl); this.NavigationTitle = ko.observable(navigation.NavigationTitle); this.NavigationDescription = ko.observable(navigation.NavigationDescription); var mappedChildren = ko.utils.arrayMap(navigation.Children, function (child) { return new Menu(child); }); this.Children = ko.observableArray(mappedChildren); } function DashboardViewModel() { var self = this; self.LoggedUser = ko.observable(""); self.Navigations = ko.observableArray([]); $.get('/Home/DashboardDependencies', {}, function (result) { self.LoggedUser(result.LoggedUser); var mappedNavigations = ko.utils.arrayMap(result.Navigations, function (item) { var menu = new Menu(item); // When I alert item, the result appears properly: // { "NavigationTitle": "blah", "NavigationDescription": "bleh" [...] } alert(JSON.stringify(item)); // But when I alert the new menu object, the result doesn't appear: // Just: "{}" alert(JSON.stringify(menu)); return menu; }); self.Navigations = mappedNavigations; }); } ko.applyBindings(new DashboardViewModel()); So, check it out. When I try to alert the item variable, the result appears properly. When I try to alert the new Menu object, the result just show {}. Why this' happening? Thank you all for the help!

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  • Should conditional expressions go inside or outside of classes?

    - by Rupert
    It seems that often I will want to execute some methods from a Class when I call it and choosing which function will depend on some condition. This leads me to write classes like in Case 1 because it allows me to rapidly include their functionality. The alternative would be Case 2 which can take a lot of time if there is a lot of code and also means more code being written twice when I drop the Class into different pages. Having said that, Case 1 feels very wrong for some reason that I can't quite put my finger on. I haven't really seen any classes written like this, I suppose. Is there anything wrong with writing classes like in Case 1 or is Case 2 superior? Or is there a better way? What the advantages and disadvantages of each? Case 1 class Foo { public function __construct($bar) { if($bar = 'action1') $this->method1(); else if($bar = 'action2') $this->method2(); else $this->method1(); } public function method1() { } public function method2() { } } $bar = 'action1' $foo = new Foo($bar); Case 2 class Foo { public function __construct() { } public function method1() { } public function method2() { } } $foo = new Foo; $bar = 'action1'; if($bar == 'action1') $foo->method1(); else if($bar == 'action2') $foo->method2(); else $foo->method1();

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  • c++ figuring out memory layout of members programatically

    - by anon
    Suppose in one program, I'm given: class Foo { int x; double y; char z; }; class Bar { Foo f1; int t; Foo f2; }; int main() { Bar b; bar.f1.z = 'h'; bar.f2.z = 'w'; ... some crap setting value of b; FILE *f = fopen("dump", "wb"); // c-style file fwrite(&b, sizeof(Bar), 1, f); } Suppose in another program, I have: int main() { File *f = fopen("dump", "rb"); std::string Foo = "int x; double y; char z;"; std::string Bar = "Foo f1; int t; Foo f2;"; // now, given this is it possible to read out // the value of bar.f1.z and bar.f2.z set earlier? } WHat I'm asking is: given I have the types of a class, can I figure out how C++ lays it out?

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  • Clarification on ZVals

    - by Beachhouse
    I was reading this: http://www.dereleased.com/2011/04/27/the-importance-of-zvals-and-circular-references/ And there's an example that lost me a bit. $foo = &$bar; $bar = &$foo; $baz = 'baz'; $foo = &$baz; var_dump($foo, $bar); /* string(3) "baz" NULL */ If you’ve been following along, this should make perfect sense. $foo is created, and pointed at a ZVal location identified by $bar; when $bar is created, it points at the same place $foo was pointed. That location, of course, is null. When $foo is reassigned, the only thing that changes is to which ZVal $foo points; if we had assigned a different value to $foo first, then $bar would still retain that value. I learned to program in C. I understand that PHP is different and it uses ZVals instead of memory locations as references. But when you run this code: $foo = &$bar; $bar = &$foo; It seems to me that there would be two ZVals. In C there would be two memory locations (and the values would be of the opposite memory location). Can someone explain?

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