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  • Replacement relevance sorting for MySQL fulltext in InnoDB tables?

    - by Giles Smith
    I am using MySQL InnoDB and want to do fulltext style searches on certain columns. What is the best way of sorting the results in order of relevance? I am trying to do something like: SELECT columns, (LENGTH(column_name) - LENGTH(REPLACE(column_name, '%searchterm%', ''))) AS score FROM table WHERE column_name LIKE '%searchterm%' ORDER BY score However this will become quite complicated once I start searching more than 1 column or using more than one keyword. I already have several joins happening so have simplified the query above. Can anyone suggest a better way? I don't want to use any 3rd party software like Sphinx etc

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  • Clicking DetailsView’s Update button doesn’t cause a postback

    - by AspOnMyNet
    If I define the following template inside DetailsView, then upon clicking an Update or Insert button, the page is posted back to the server: <EditItemTemplate> <asp:TextBox ID="txtDate" runat="server" Text='<%# Bind("Date") %>'></asp:TextBox> <asp:CompareValidator ID="valDateType" runat="server" ControlToValidate="txtDate" Type="Date" Operator="DataTypeCheck" Display="Dynamic" >*</asp:CompareValidator> </EditItemTemplate> But if I remove CompareValidator control from the above code, then for some reason clicking an Update or Insert button doesn’t cause a postback...instead nothing happens: <EditItemTemplate> <asp:TextBox ID="txtDate" runat="server" Text='<%# Bind("Date") %>'></asp:TextBox> </EditItemTemplate> Any idea why page doesn't get posted back? thanx

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  • IEnumerable.GetEnumerator() and IEnumerable<T>.GetEnumerator()

    - by Dylan Lin
    Hi, In the .net framework, there's a generic IEnumerable<T> interface which inherits from the not-generic IEnumerable, and they both have a GetEnumerator() method. The only differents between these two GetEnumerator() is the return type. Now I have a similar design, but when I compile the code, the compiler said: MyInterface<T>.GetItem()' hides inherited member 'MyInterface.GetItem()'. Use the new keyword if hiding was intended. The MyInterface<T>.GetItem() returns a concrete type T, while MyInterface.GetItem() returns type System.Object. So I think if the BCL team guys compile the .net framework, they will get the same warning. I think having compiler warnings is not good, what do you think? And how can I solve this problem? I mean I want to get the concrete type T when calling the MyInterface<T>.GetItem() not just a instance of type System.Object. Thanks in advance! :-)

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  • Python string formatting when string contains "%s" without escaping

    - by Stephen Gornick
    When formatting a string, my string may contain a modulo "%" that I do not wish to have converted. I can escape the string and change each "%" to "%%" as a workaround. e.g., 'Day old bread, 50%% sale %s' % 'today!' output: 'Day old bread, 50% sale today' But are there any alternatives to escaping? I was hoping that using a dict would make it so Python would ignore any non-keyword conversions. e.g., 'Day old bread, 50% sale %(when)s' % {'when': 'today'} but Python still sees the first modulo % and gives a: TypeError: not enough arguments for format string

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  • Compare two dates with JPA

    - by Kiva
    Hello everybody, I need to compare two dates in a JPQL query but it doesn't work. Here is my query: Query query = em.createQuery("SELECT h FROM PositionHistoric h, SeoDate d WHERE h.primaryKey.siteDb = :site AND h.primaryKey.engineDb = :engine AND h.primaryKey.keywordDb = :keyword AND h.date = d AND d.date <= :date ORDER BY h.date DESC"); My parameter date is a java.util.Date My query return a objects list but the dates are upper and lower to my parameter. Someone kown how to do this ? Thanks.

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  • Checking attribute exists in JSP

    - by Javi
    Hello, I have some classes which extends a superclass, and in the JSP I want to show some attributes of these classes. I only want to make one JSP, but I don't know in advance if the object has an attribute or not. So I need a JSTL expression or a tag which checks that the object I pass has this attribute (similar to in operator in javascript, but in the server). <c:if test="${an expression which checks if myAttribute exists in myObject}"> <!-- Display this only when myObject has the atttribute "myAttribute" --> <!-- Now I can access safely to "myAttribute" --> ${myObject.myAttribute} </C:if> How can I get this? Thanks.

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  • Difference between Singleton implemention using pointer and using static object

    - by Anon
    EDIT: Sorry my question was not clear, why do books/articles prefer implementation#1 over implementation#2? What is the actual advantage of using pointer in implementation of Singleton class vs using a static object? Why do most books prefer this class Singleton { private: static Singleton *p_inst; Singleton(); public: static Singleton * instance() { if (!p_inst) { p_inst = new Singleton(); } return p_inst; } }; over this class Singleton { public: static Singleton& Instance() { static Singleton inst; return inst; } protected: Singleton(); // Prevent construction Singleton(const Singleton&); // Prevent construction by copying Singleton& operator=(const Singleton&); // Prevent assignment ~Singleton(); // Prevent unwanted destruction };

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  • What does double? mean in C# ?

    - by Nikhil
    Hi, While reading the code of the NUnit project's assert class, I came across this particular construct - public static void AreEqual(double expected, double? actual, double delta) { AssertDoublesAreEqual(expected, (double)actual, delta ,null, null); } In this function the second input parameter is entered as "double?". The interesting thing is that this code compiles without issue in VS2010 (c# 4.0). Anyone know why this is NOT throwing an error ? Why is "double?" considered a valid keyword and is there any special significance to the "?".

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  • Python serialize lexical closures?

    - by dsimcha
    Is there a way to serialize a lexical closure in Python using the standard library? pickle and marshal appear not to work with lexical closures. I don't really care about the details of binary vs. string serialization, etc., it just has to work. For example: def foo(bar, baz) : def closure(waldo) : return baz * waldo return closure I'd like to just be able to dump instances of closure to a file and read them back. Edit: One relatively obvious way that this could be solved is with some reflection hacks to convert lexical closures into class objects and vice-versa. One could then convert to classes, serialize, unserialize, convert back to closures. Heck, given that Python is duck typed, if you overloaded the function call operator of the class to make it look like a function, you wouldn't even really need to convert it back to a closure and the code using it wouldn't know the difference. If any Python reflection API gurus are out there, please speak up.

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  • parsing string according to oracle operators with regex

    - by haluk
    Hi, Basically I was trying to replace the part of string with its actual value which comes immediately after oracle operators. I can do this for limited operators list like {=,,<} but I wonder that is there any way out to gather all the operators rather than giving them by hands? For instance, I have this string; "a = xyz", then I will replace xyz with lets say 3. But as you know we have bunch of operator namely "like,in,exists etc". So my string can also be this: "a like xyz". So what do you suggest me? Thanks.

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  • jpa IllegalArgumentException exception

    - by Bunny Rabbit
    i've three entity classes in my project public class Blobx { @ManyToOne private Userx user; @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private Key id; } public class Index { @Id private String keyword; @OneToMany(cascade = CascadeType.PERSIST) private List<Blobx> blobs; } public class Userx { @Id private String name; @OneToMany(mappedBy = "user") private List<Blobx>blobs; } while running the following lines app engine throws an exception em.getTransaction().begin(); em.persist(index); em.getTransaction().commit();//exception is thrown em.close(); as Caused by: java.lang.IllegalArgumentException: can't operate on multiple entity groups in a single transaction. found both Element { type: "Index" name: "function" } and Element { type: "Userx" name: "18580476422013912411" } i can't understand what's wrong?

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  • Recursive CTE Problem

    - by Chris
    Hi, I am trying to use a recursive CTE in SQL Server to build up a predicate formula from a table containing the underlying tree structure. For example, my table looks like: -------------------------- Id Operator/Val ParentId -------------------------- 1. 'OR' NULL 2. 'AND' 1 3. 'AND' 1 4. '' 2 5. 'a' 4 6. 'alpha' 4 : : : -------------------------- which represents ((a alpha) AND (b beta)) OR ((c gamma) AND (a < delta)). ParentId is a reference to the Id in the same table of the parent node. I want to write a query which will build up this string from the table. Is it possible? Thanks

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  • Get CLSID by PIA interface Type

    - by Charles
    How can I get the CLSID for a given interface within a Primary Interop Assembly? Here's what I'm talking about: // The c# compiler does some interesting magic. // The following code ... var app = new Microsoft.Office.Interop.Outlook.Application(); // ... is compiled like so (disassembled with Reflector): var app =((Microsoft.Office.Interop.Outlook.Application) Activator.CreateInstance(Type.GetTypeFromCLSID(new Guid("0006F03A-0000-0000-C000-000000000046")))); Microsoft.Office.Interop.Outlook.Application is an interface, and therefore it cannot be instantiated directly. What's interesting here is that c# lets you treat these COM interfaces as if there where classes that you can instantiate with the new keyword. What I want to know is, given the System.Type for a given interface, how can I get the CLSID? Note: I ultimately want to be able to create an instance given the interface's System.Type - I don't really care how. I'm assuming here that the easiest way to do this would be to get CLSID given the Type, just as the c# compiler does.

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  • How do you fix TSD02016 error in Database

    - by Keith Sirmons
    Howdy, I have a database I am using the Visual Studio 2010 Database Project tool vsdbcmd.exe to create a schema from. vsdbcmd /a:Import /dsp:Sql /model:"Database" /cs:"Server=SqlServer; Initial Catalog=DatabaseName; Integrated Security=SSPI;" The tool is reporting an error: Error TSD02016, Gen-259 (12,50) The column name is not valid. No table name was specified. How would I go about pinpointing where this error is originating? I have found one resource on the internet (http://social.msdn.microsoft.com....) that points to a possibility of a keyword used incorrectly, but the error messages are not the same. What is Gen-259? Thank you, Keith

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  • Help me finish this Python 3.x self-challenge.

    - by Hamish Grubijan
    This is not a homework. I saw this article praising Linq library and how great it is for doing combinatorics stuff, and I thought to myself: Python can do it in a more readable fashion. After half hour of dabbing with Python I failed. Please finish where I left off. Also, do it in the most Pythonic and efficient way possible please. from itertools import permutations from operator import mul from functools import reduce glob_lst = [] def divisible(n): return (sum(j*10^i for i,j in enumerate(reversed(glob_lst))) % n == 0) oneToNine = list(range(1, 10)) twoToNine = oneToNine[1:] for perm in permutations(oneToNine, 9): for n in twoToNine: glob_lst = perm[1:n] #print(glob_lst) if not divisible(n): continue else: # Is invoked if the loop succeeds # So, we found the number print(perm) Thanks!

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  • Bacula windows client could not connect to Bacula director

    - by pr0f-r00t
    I have a Bacula server on my Linux Debian squeeze host (Bacula version 5.0.2) and a Bacula client on Windows XP SP3. On my network each client can see each other, can share files and can ping. On my local server I could run bconsole and the server responds but when I run bconsole or bat on my windows client the server does not respond. Here are my configuration files: bacula-dir.conf: # # Default Bacula Director Configuration file # # The only thing that MUST be changed is to add one or more # file or directory names in the Include directive of the # FileSet resource. # # For Bacula release 5.0.2 (28 April 2010) -- debian squeeze/sid # # You might also want to change the default email address # from root to your address. See the "mail" and "operator" # directives in the Messages resource. # Director { # define myself Name = nima-desktop-dir DIRport = 9101 # where we listen for UA connections QueryFile = "/etc/bacula/scripts/query.sql" WorkingDirectory = "/var/lib/bacula" PidDirectory = "/var/run/bacula" Maximum Concurrent Jobs = 1 Password = "Cv70F6pf1t6pBopT4vQOnigDrR0v3L" # Console password Messages = Daemon DirAddress = 127.0.0.1 # DirAddress = 72.16.208.1 } JobDefs { Name = "DefaultJob" Type = Backup Level = Incremental Client = nima-desktop-fd FileSet = "Full Set" Schedule = "WeeklyCycle" Storage = File Messages = Standard Pool = File Priority = 10 Write Bootstrap = "/var/lib/bacula/%c.bsr" } # # Define the main nightly save backup job # By default, this job will back up to disk in /nonexistant/path/to/file/archive/dir Job { Name = "BackupClient1" JobDefs = "DefaultJob" } #Job { # Name = "BackupClient2" # Client = nima-desktop2-fd # JobDefs = "DefaultJob" #} # Backup the catalog database (after the nightly save) Job { Name = "BackupCatalog" JobDefs = "DefaultJob" Level = Full FileSet="Catalog" Schedule = "WeeklyCycleAfterBackup" # This creates an ASCII copy of the catalog # Arguments to make_catalog_backup.pl are: # make_catalog_backup.pl <catalog-name> RunBeforeJob = "/etc/bacula/scripts/make_catalog_backup.pl MyCatalog" # This deletes the copy of the catalog RunAfterJob = "/etc/bacula/scripts/delete_catalog_backup" Write Bootstrap = "/var/lib/bacula/%n.bsr" Priority = 11 # run after main backup } # # Standard Restore template, to be changed by Console program # Only one such job is needed for all Jobs/Clients/Storage ... # Job { Name = "RestoreFiles" Type = Restore Client=nima-desktop-fd FileSet="Full Set" Storage = File Pool = Default Messages = Standard Where = /nonexistant/path/to/file/archive/dir/bacula-restores } # job for vmware windows host Job { Name = "nimaxp-fd" Type = Backup Client = nimaxp-fd FileSet = "nimaxp-fs" Schedule = "WeeklyCycle" Storage = File Messages = Standard Pool = Default Write Bootstrap = "/var/bacula/working/rsys-win-www-1-fd.bsr" #Change this } # job for vmware windows host Job { Name = "arg-michael-fd" Type = Backup Client = nimaxp-fd FileSet = "arg-michael-fs" Schedule = "WeeklyCycle" Storage = File Messages = Standard Pool = Default Write Bootstrap = "/var/bacula/working/rsys-win-www-1-fd.bsr" #Change this } # List of files to be backed up FileSet { Name = "Full Set" Include { Options { signature = MD5 } # # Put your list of files here, preceded by 'File =', one per line # or include an external list with: # # File = <file-name # # Note: / backs up everything on the root partition. # if you have other partitions such as /usr or /home # you will probably want to add them too. # # By default this is defined to point to the Bacula binary # directory to give a reasonable FileSet to backup to # disk storage during initial testing. # File = /usr/sbin } # # If you backup the root directory, the following two excluded # files can be useful # Exclude { File = /var/lib/bacula File = /nonexistant/path/to/file/archive/dir File = /proc File = /tmp File = /.journal File = /.fsck } } # List of files to be backed up FileSet { Name = "nimaxp-fs" Enable VSS = yes Include { Options { signature = MD5 } File = "C:\softwares" File = C:/softwares File = "C:/softwares" } } # List of files to be backed up FileSet { Name = "arg-michael-fs" Enable VSS = yes Include { Options { signature = MD5 } File = "C:\softwares" File = C:/softwares File = "C:/softwares" } } # # When to do the backups, full backup on first sunday of the month, # differential (i.e. incremental since full) every other sunday, # and incremental backups other days Schedule { Name = "WeeklyCycle" Run = Full 1st sun at 23:05 Run = Differential 2nd-5th sun at 23:05 Run = Incremental mon-sat at 23:05 } # This schedule does the catalog. It starts after the WeeklyCycle Schedule { Name = "WeeklyCycleAfterBackup" Run = Full sun-sat at 23:10 } # This is the backup of the catalog FileSet { Name = "Catalog" Include { Options { signature = MD5 } File = "/var/lib/bacula/bacula.sql" } } # Client (File Services) to backup Client { Name = nima-desktop-fd Address = localhost FDPort = 9102 Catalog = MyCatalog Password = "_MOfxEuRzxijc0DIMcBqtyx9iW1tzE7V6" # password for FileDaemon File Retention = 30 days # 30 days Job Retention = 6 months # six months AutoPrune = yes # Prune expired Jobs/Files } # Client file service for vmware windows host Client { Name = nimaxp-fd Address = nimaxp FDPort = 9102 Catalog = MyCatalog Password = "Ku8F1YAhDz5EMUQjiC9CcSw95Aho9XbXailUmjOaAXJP" # password for FileDaemon File Retention = 30 days # 30 days Job Retention = 6 months # six months AutoPrune = yes # Prune expired Jobs/Files } # Client file service for vmware windows host Client { Name = arg-michael-fd Address = 192.168.0.61 FDPort = 9102 Catalog = MyCatalog Password = "b4E9FU6s/9Zm4BVFFnbXVKhlyd/zWxj0oWITKK6CALR/" # password for FileDaemon File Retention = 30 days # 30 days Job Retention = 6 months # six months AutoPrune = yes # Prune expired Jobs/Files } # # Second Client (File Services) to backup # You should change Name, Address, and Password before using # #Client { # Name = nima-desktop2-fd # Address = localhost2 # FDPort = 9102 # Catalog = MyCatalog # Password = "_MOfxEuRzxijc0DIMcBqtyx9iW1tzE7V62" # password for FileDaemon 2 # File Retention = 30 days # 30 days # Job Retention = 6 months # six months # AutoPrune = yes # Prune expired Jobs/Files #} # Definition of file storage device Storage { Name = File # Do not use "localhost" here Address = localhost # N.B. Use a fully qualified name here SDPort = 9103 Password = "Cj-gtxugC4dAymY01VTSlUgMTT5LFMHf9" Device = FileStorage Media Type = File } # Definition of DDS tape storage device #Storage { # Name = DDS-4 # Do not use "localhost" here # Address = localhost # N.B. Use a fully qualified name here # SDPort = 9103 # Password = "Cj-gtxugC4dAymY01VTSlUgMTT5LFMHf9" # password for Storage daemon # Device = DDS-4 # must be same as Device in Storage daemon # Media Type = DDS-4 # must be same as MediaType in Storage daemon # Autochanger = yes # enable for autochanger device #} # Definition of 8mm tape storage device #Storage { # Name = "8mmDrive" # Do not use "localhost" here # Address = localhost # N.B. Use a fully qualified name here # SDPort = 9103 # Password = "Cj-gtxugC4dAymY01VTSlUgMTT5LFMHf9" # Device = "Exabyte 8mm" # MediaType = "8mm" #} # Definition of DVD storage device #Storage { # Name = "DVD" # Do not use "localhost" here # Address = localhost # N.B. Use a fully qualified name here # SDPort = 9103 # Password = "Cj-gtxugC4dAymY01VTSlUgMTT5LFMHf9" # Device = "DVD Writer" # MediaType = "DVD" #} # Generic catalog service Catalog { Name = MyCatalog # Uncomment the following line if you want the dbi driver # dbdriver = "dbi:sqlite3"; dbaddress = 127.0.0.1; dbport = dbname = "bacula"; dbuser = ""; dbpassword = "" } # Reasonable message delivery -- send most everything to email address # and to the console Messages { Name = Standard # # NOTE! If you send to two email or more email addresses, you will need # to replace the %r in the from field (-f part) with a single valid # email address in both the mailcommand and the operatorcommand. # What this does is, it sets the email address that emails would display # in the FROM field, which is by default the same email as they're being # sent to. However, if you send email to more than one address, then # you'll have to set the FROM address manually, to a single address. # for example, a '[email protected]', is better since that tends to # tell (most) people that its coming from an automated source. # mailcommand = "/usr/lib/bacula/bsmtp -h localhost -f \"\(Bacula\) \<%r\>\" -s \"Bacula: %t %e of %c %l\" %r" operatorcommand = "/usr/lib/bacula/bsmtp -h localhost -f \"\(Bacula\) \<%r\>\" -s \"Bacula: Intervention needed for %j\" %r" mail = root@localhost = all, !skipped operator = root@localhost = mount console = all, !skipped, !saved # # WARNING! the following will create a file that you must cycle from # time to time as it will grow indefinitely. However, it will # also keep all your messages if they scroll off the console. # append = "/var/lib/bacula/log" = all, !skipped catalog = all } # # Message delivery for daemon messages (no job). Messages { Name = Daemon mailcommand = "/usr/lib/bacula/bsmtp -h localhost -f \"\(Bacula\) \<%r\>\" -s \"Bacula daemon message\" %r" mail = root@localhost = all, !skipped console = all, !skipped, !saved append = "/var/lib/bacula/log" = all, !skipped } # Default pool definition Pool { Name = Default Pool Type = Backup Recycle = yes # Bacula can automatically recycle Volumes AutoPrune = yes # Prune expired volumes Volume Retention = 365 days # one year } # File Pool definition Pool { Name = File Pool Type = Backup Recycle = yes # Bacula can automatically recycle Volumes AutoPrune = yes # Prune expired volumes Volume Retention = 365 days # one year Maximum Volume Bytes = 50G # Limit Volume size to something reasonable Maximum Volumes = 100 # Limit number of Volumes in Pool } # Scratch pool definition Pool { Name = Scratch Pool Type = Backup } # # Restricted console used by tray-monitor to get the status of the director # Console { Name = nima-desktop-mon Password = "-T0h6HCXWYNy0wWqOomysMvRGflQ_TA6c" CommandACL = status, .status } bacula-fd.conf on client: # # Default Bacula File Daemon Configuration file # # For Bacula release 5.0.3 (08/05/10) -- Windows MinGW32 # # There is not much to change here except perhaps the # File daemon Name # # # "Global" File daemon configuration specifications # FileDaemon { # this is me Name = nimaxp-fd FDport = 9102 # where we listen for the director WorkingDirectory = "C:\\Program Files\\Bacula\\working" Pid Directory = "C:\\Program Files\\Bacula\\working" # Plugin Directory = "C:\\Program Files\\Bacula\\plugins" Maximum Concurrent Jobs = 10 } # # List Directors who are permitted to contact this File daemon # Director { Name = Nima-desktop-dir Password = "Cv70F6pf1t6pBopT4vQOnigDrR0v3L" } # # Restricted Director, used by tray-monitor to get the # status of the file daemon # Director { Name = nimaxp-mon Password = "q5b5g+LkzDXorMViFwOn1/TUnjUyDlg+gRTBp236GrU3" Monitor = yes } # Send all messages except skipped files back to Director Messages { Name = Standard director = Nima-desktop = all, !skipped, !restored } I have checked my firewall and disabled the firewall but it doesn't work.

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  • generalizing the pumping lemma for UNIX-style regular expressions

    - by Avi
    Most UNIX regular expressions have, besides the usual *,+,? operators a backslash operator where \1,\2,... match whatever's in the last parentheses, so for example L=(a)b\1* matches the (non regular) language a^n b a^n On one hand, this seems to be pretty powerful since you can create (a*)b\1b\1 to match the language a^n b a^n b a^n which can't even be recognized by a stack automaton. On the other hand, I'm pretty sure a^n b^n cannot be expressed this way. Two questions: 1. Is there any literature on this family of languages (UNIX-y regular). In particular, is there a version of the pumping lemma for these? 2. Can someone prove (or perhaps disprove) that a^n b^n cannot be expressed this way? Thanks

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  • What do I return if the return type of a method is Void? (Not void!)

    - by DR
    Due to the use of Generics in Java I ended up in having to implement a function having Void as return type: public Void doSomething() { //... } and the compiler demands that I return something. For now I'm just returning null, but I'm wondering if that is good coding practice... I've also tried Void.class, void, Void.TYPE, new Void(), no return at all, but all that doesn't work at all. (For more or less obvious reasons) (See this answer for details) So what am I supposed to return if the return type of a function is Void? What's the general use of the Void class? EDIT: Just to spare you the downvotes: I'm asking about V?oid, not v?oid. The class Void, not the reserved keyword void.

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  • Where do I find a good explanation of Javascript-ese

    - by tzenes
    I realize that title may require explanation. The language I first learned was C, and it shows in all my programs... even those not written in C. For example, when I first learned F# I wrote my F# programs like C programs. It wasn't until someone explained the pipe operator and mapping with anonymous functions that I started to understand the F#-ese, how to write F# like a F# programmer and not a C programmer. Now I've written a little javascript, mostly basic stuff using jquery, but I was hoping there was a good resource where I could learn to write javascript programs like a javascript programmer.

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  • Help me finish this Python self-challenge.

    - by Hamish Grubijan
    This is not a homework. I saw this article praising Linq library and how great it is for doing combinatorics stuff, and I thought to myself: Python can do it in a more readable fashion. After half hour of dabbing with Python I failed. Please finish where I left off. Also, do it in the most Pythonic and efficient way possible please. from itertools import permutations from operator import mul from functools import reduce glob_lst = [] def divisible(n): return (sum(j*10^i for i,j in enumerate(reversed(glob_lst))) % n == 0) oneToNine = list(range(1, 10)) twoToNine = oneToNine[1:] for perm in permutations(oneToNine, 9): for n in twoToNine: glob_lst = perm[1:n] #print(glob_lst) if not divisible(n): continue else: # Is invoked if the loop succeeds # So, we found the number print(perm) Thanks!

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  • Objective-c string appending causes exception

    - by Dave C
    Hello Everyone, The following code is causing me some problems. The third line causes a program crash... it doesn't happen the first time I step through but somehow later on in the program. If I comment out that third line, the program runs smoothly. NSString *myRequestString = @"text"; int i = 1; myRequestString = [myRequestString stringByAppendingString:[NSString stringWithFormat: @"t=%d", i]]; That code causes this exception: * -[CFString release]: message sent to deallocated instance 0xb4c43fe0 On a side note, can anyone tell me how to concatenate strings in objective-c like any other normal language... I can't believe that there is no concatenation operator. Any and all help is greatly appreciated.

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  • Command Line PHP with shell_exec works for root but not others

    - by Kristopher Ives
    I have a very simple script that is to test if running a shell_exec (or backtick operator) basically works: #!/usr/bin/php5-cli <?php echo "This is a PHP script\n"; echo `ls -l /home/stoysnet/`; Unless I run this as root, it always gives me: $ ./foo.php This is a PHP script Warning: _shell_exec(): Permission Denied in /home/stoysnet/foo.php on line 5 I've tried running this via PHP in a few different ways, but I always get the same error. However, when I put the script into a subdirectory of /etc/ owned by root:root and executed as root it works. What gives?

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  • Simpler Linq to XML queries with the DLR

    - by Xavier
    Hi folks, I have a question regarding Linq to XML queries and how we could possibly make them more readable using the new dynamic keyword. At the moment I am writing things like: var result = from p in xdoc.Elements("product") where p.Attribute("type").Value == "Services" select new { ... } What I would like to write is something like: var result = from p in xdoc.Products where p.Type == "Services" select new { ... } I know I can do this with Linq to XSD which is pretty good already, but obviously this requires an XSD schema and I don't always have one. I am sure there should be a way to achieve this using the new dynamic features of .NET 4.0 but I'm not sure how or if anyone already had a go at this. Obviously I would loose some of the advantages of Linq to XSD (typed members and compile time checks) but it wouldn't be worse than the original solution and would certainly be more readable. Anyone has an idea? Thanks

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  • Working with expression AST:s

    - by Marcus
    Hi, Is there any best practice when working with AST:s? I have a parsed expression AST. ConstantExpression, BinaryExpression etc. I want to populate a GUI-dialog with information from the AST, and it's here where I get kinda confused because my code gets pretty messy. Example: expression = "Var1 > 10 AND Var2 < 20" I want to populate two textboxes with value 10 resp. 20 from the AST. What I'm doing now is a recursive method that checks for correct child expression-types (with .Net Is-operator) and acts accordingly and the code is really "smelly" :) Is there any design pattern, like Visitor or such, that makes this somewhat easier/more readable/maintainable ?

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