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• PHP OOP: Chainable objects?

  - by Industrial

  Hi everybody, I have tried to find a good introduction on chainable OOP objects in PHP, but without any good result yet. How can something like this be done? $this->className->add('1','value'); $this->className->type('string'); $this->classname->doStuff(); Or even: $this->className->add('1','value')->type('string')->doStuff(); Thanks a lot!

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• Debug the StackOverFlow exception

  - by BDotA

  When I run my C# program it throws an Stack Overflow exception in one of the methods on a DLL that I have a reference to it in my solution. but no debugging info is available to me because it says it is an stack overflow exception and no info is available. what are the next debugging steps that I should follow to understand what is going on and why ? thanks Edit: here is the code that stops at: static public Collection SortCollection(Collection oCollection, string sPropertyName, string sKeyPropertyName) { return SortCollection(oCollection, sPropertyName, sKeyPropertyName); }

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• expression issue for derived column in ssis package

  - by happysmile

  i have an string like this format in my case i need to extract only the characters from string case 1)12AB 2)SD12 3)1WE4 output 1)AB 2)SD 3)WE i need to extract only the characters i am using this expresion in the dervied column in SSIS package SUBSTRING(MediaIDCode,1,2) but this expresssion works for only this condition 1)12AB i need to get an expressioin that works for all the conditions above any help would be great Thanks Prince

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• Equivalent lambda syntax for linq query

  - by ilias

  Hi, I am having a mind-freeze here, but I cant seem to find the equivalent lambda syntax for - string[] a = {"a","b","c"}; string[] b = {"1","2","3"}; var x = from a1 in a from b1 in b select new{a1, b1};

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• Substring a text since the target founded

  - by user580463

  I have a search on my php page and it is ok. With my search result, I highlighted the string target on my content. $search_tag_text = @preg_replace("/($mysearch)/i", "<u style=\"color:red\">$1</u>", $row->txtContent); Ok, but is it possible, after having found a string target on my content, to show 20 words before and 20 words after, instead listing all my content? Any help will be appreciated.

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• jQuery uses (new Function("return " + data))(); instead of eval(data); to parse JSON, why?

  - by Luca Matteis

  This link shows you that jQuery uses (new Function("return " + data))(); for older browsers, to parse a JSON string instead of eval(). What are the benefits of this? What if the JSON string isn't safe?

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• Regular Express remove leading blank and dash character

  - by Ke

  Hi, Given a string like String a="- = - - What is your name?"; How to remove the leading equal, dash, space characters, to get the clean text, "What is your name?" Thanks.

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• LINQ TO SQL, Dynamic query with DATE type fields

  - by acanthus

  Hello, I'm building a query with the LINQ dynamic library so I don't know how many potential parameters will I have and I get an error when trying to query DATE type fields: Operator '=' incompatible with operand types 'DateTime' and 'String' When I step through the debugger in the Dynamic.cs it shows that the value is of type string and the field is of type date so the problem is obvious but I have no idea how to approach it. Any ideas? BR

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• What is the best way of inserting a datetime value using dynamic sql

  - by jaffa

  What is the best way of inserting a datetime value using a dynamic sql string, whilst at the same time being able to handle the possibility of the value being null? The current statement inserts into a table from a select statement built using a string. The datetime value is stored in a parameter and the parameter is used in the select. Like so: set @execsql = 'Insert into ( start_date ) SELECT ( ''' + CAST(start_date as VARCHAR) + ''' + ')'

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• Should I use an ArrayList or IList

  - by Farstucker

  Im using the .NET framework 1.1 and Im hoping someone could help me implement a dynamic array of objects? A watered-down example of the object I wish use is below. Class CarObj { public string CarName; public string CarYear; } Should I use an ArrayList or do you think it would be better to make a CarList class to implement an IList interface? Is there a performance benefit for one over another?

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• how to dynamically give buffer value in Objective-C

  - by suse

  hello, i ve a string , for example: NSString *str = @"12,20,40,320,480" This str has to be given as buffer value, UInt8 *buffer; Now how to give the str as buffer value? The value of str string keeps changing , and hence buffer has to dynamically take the value as str everytime. plz help me how to achieve this. Thank You.

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• How shall I declare Iterator?

  - by Knowing me knowing you

  Which form is preferred: String my = "Which form shall I use?"; Iterator iter = my.iterator(); or Iterator<String> iter = my.iterator(); I personally preferr the former but in my materials from uni they use the latter.

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• Can i use a parameter multiple times in the qame query?

  - by djerry

  Hey guys, i was wondering, can a parameter be used more then once in the same query, like this : MySqlParameter oPar0 = new MySqlParameter("e164", MySqlDbType.String); oPar0.Value = user.E164; string sSQL0 = "Delete from callmone.call where (caller=?e164 or called=?e164);"; clsDatabase.ExecuteSQL(sSQL0, oPar0); Is this possible or should i write 2 parameters?

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• Regular expression (PCRE) for url matching

  - by zerkms

  The input: we get some plain text as input string and we have to highlighight all urls there with {url For some time i've used regex taken from http://flanders.co.nz/2009/11/08/a-good-url-regular-expression-repost/, which i modified several times, but it's built for another issue - to check whether the whole input string is an url or no. So, what regex do you use in such issues?

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• A problem with compare item value

  - by Tony

  Hi, I have defined my class: public class Host { public string Name; } then a strongly-typed dictionary: Dictionary<string, Host> HostsTable; then I try to compare a value: if (HostsTable.Values.Where(s => s.Name == "myhostname") != null) { doSomething } and the problem is, nothing is found, even I'm sure the item is on the list. What I'm doing wrong ?

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• LINQ - joining multiple lists

  - by kristian

  I've looked at the 101 Linq Samples here but I can't see anything like this in that list. If I'm just not seeing a relevant example there, please link to it. If I have these 3 classes: class Student { int id; string name } class Course { int id, string name } class Enrolment { int studentId; int courseId; } How would I use LINQ to get a list of courses a student is enrolled on? (assume I have an IList of all three classes)

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• When should I use \A in a regex?

  - by S.Mark

  End of line anchor $ match even there is extra trailing \n in matched string, so we use \Z instead of $ For example ^\w+$ will match the string abcd\n but ^\w+\Z is not How about \A and when to use?

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• How to find which control made the asyncpostback ?

  - by StupidDeveloper

  I know how to find which control made the postback, it's something like: string postBackControl = Request.Params.Get("__EVENTTARGET") == null ? string.Empty : Request.Params.Get("__EVENTTARGET"); but how can I find the one that made async postback?

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• Why are member constants available even if there are no instances of a its class?

  - by flockofcode

  1) Why are member constants available even if there are no instances of a its class? 2) Is the only reason why constant expressions need to be fully evaluated at compile time due to compiler replacing constant variable with literal value? 3) Since string is also an object, I would think the following would produce an error, but it doesn’t. Why? class A { const string b = “it works”; } thank you

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• Callable objects on ActionScript?

  - by CodexDraco

  Hi, is it posible to have callable objects on ActionScript? For example: class Foo extends EventDispatcher { Foo() { super(); } call(world:String):String { return "Hello, " + world; } } And later... var foo:Foo = new Foo(); trace( foo("World!") ); // Will NOT work

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• How to dislpay Kannada (Indic) Fonts in a Java application

  - by AJ

  I am trying to dislplay a kannda character in a Java app. String fonts[] = ge.getAvailableFontFamilyNames(); This shows that there is a font family by name "BRH Kannada" Font f = new Font("BRH Kannada", Font.PLAIN, 20); and then I do button.setFont(f); now when i set the button text, i have to ideally get the text on button to use the BRH kannada font. However, what and how should i give the string as? Rgds, AJ

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• File sorting, Comparison method violates its general contract

  - by user2677383

  My file sorting comparator sometimes invoke java.lang.IllegalArgumentException in android app. I cannot figure out the reason. could you explain that? here is my code block: Comparator cc = new Comparator<File>() { @Override public int compare(File f1, File f2) { if (f1.isDirectory() && !f2.isDirectory()) { return 1; } if (f2.isDirectory() && !f1.isDirectory()) { return -1; } if ((f1.isFile() && f2.isFile()) || (f1.isDirectory() && f2.isDirectory())) { if (sort == 1) { return Util.compareFileName(f2.getName(), f1.getName()); } else if (sort == 2) { return (int) (f1.lastModified() - f2.lastModified()); } else if (sort == 3) { return (int) (f2.lastModified() - f1.lastModified()); } else if (sort == 4) { return (int) (f1.length() - f2.length()); } else if (sort == 5) { return (int) (f2.length() - f1.length()); } else return Util.compareFileName(f1.getName(), f2.getName()); } return f1.compareTo(f2); } }; Util.compareFileName is as followings: public static int compareFileName(String s1, String s2) { int thisMarker = 0; int thatMarker = 0; int s1Length = s1.length(); int s2Length = s2.length(); while (thisMarker < s1Length && thatMarker < s2Length) { String thisChunk = getChunk(s1, s1Length, thisMarker); thisMarker += thisChunk.length(); String thatChunk = getChunk(s2, s2Length, thatMarker); thatMarker += thatChunk.length(); // If both chunks contain numeric characters, sort them numerically int result = 0; if (isDigit(thisChunk.charAt(0)) && isDigit(thatChunk.charAt(0))) { // Simple chunk comparison by length. int thisChunkLength = thisChunk.length(); result = thisChunkLength - thatChunk.length(); // If equal, the first different number counts if (result == 0) { for (int i = 0; i < thisChunkLength; i++) { result = thisChunk.charAt(i) - thatChunk.charAt(i); if (result != 0) { return result; } } } } else { result = thisChunk.compareTo(thatChunk); } if (result != 0) return result; } return s1Length - s2Length; }

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• How to convert an NSString into an CGPathRef or path?

  - by mystify

  I guess that string drawing actually works with paths. Could I generate a path out of a string, which than can have a fill color and an outline color, and all this stuff? How would I convert an NSString into a path?

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• Using preg_replace in php for whitespace between <br/> and <p> tags

  - by Prime Studios

  I need to remove this string if found in my string: <p><br/> </p> Cant replace this: <p><br/>Test. </p> The whitespace expression I am using wasn't working for that, thank you for your help!

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• How to properly mix generics and inheritance to get the desired result?

  - by yamsha

  My question is not easy to explain using words, fortunately it's not too difficult to demonstrate. So, bear with me: public interface Command<R> { public R execute();//parameter R is the type of object that will be returned as the result of the execution of this command } public abstract class BasicCommand<R> { } public interface CommandProcessor<C extends Command<?>> { public <R> R process(C<R> command);//this is my question... it's illegal to do, but you understand the idea behind it, right? } //constrain BasicCommandProcessor to commands that subclass BasicCommand public class BasicCommandProcessor implements CommandProcessor<C extends BasicCommand<?>> { //here, only subclasses of BasicCommand should be allowed as arguments but these //BasicCommand object should be parameterized by R, like so: BasicCommand<R> //so the method signature should really be // public <R> R process(BasicCommand<R> command) //which would break the inheritance if the interface's method signature was instead: // public <R> R process(Command<R> command); //I really hope this fully illustrates my conundrum public <R> R process(C<R> command) { return command.execute(); } } public class CommandContext { public static void main(String... args) { BasicCommandProcessor bcp = new BasicCommandProcessor(); String textResult = bcp.execute(new BasicCommand<String>() { public String execute() { return "result"; } }); Long numericResult = bcp.execute(new BasicCommand<Long>() { public Long execute() { return 123L; } }); } } Basically, I want the generic "process" method to dictate the type of generic parameter of the Command object. The goal is to be able to restrict different implementations of CommandProcessor to certain classes that implement Command interface and at the same time to able to call the process method of any class that implements the CommandProcessor interface and have it return the object of type specified by the parametarized Command object. I'm not sure if my explanation is clear enough, so please let me know if further explanation is needed. I guess, the question is "Would this be possible to do, at all?" If the answer is "No" what would be the best work-around (I thought of a couple on my own, but I'd like some fresh ideas)

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