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• How to test if a table is empty, using Hibernate

  - by landon9720

  Using Hibernate, what is the most efficient way to determine if a table is empty or non-empty? In other words, does the table have 0, or more than 0 rows? I could execute the HQL query select count(*) from tablename and then check if result is 0 or non-0, but this isn't optimal as I would be asking the database for more detail than I really need.

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• When do we need <auth-constraint> element empty?

  - by giri

  Hi I wanna know when I leave empty element empty in my Deployment Descriptor file then it does not grant any role to access But when do i need it DD where all the time anyone role must access my web page. In which situation I do not need no role to be accessed?

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• Remove an empty directory from a ZIP file with PHP

  - by desolat

  PHP brings a class for ZIP file manipulation. It also allows the creation of directories with addEmptyDir() and the deletion of an entry with deleteName(). But the deletion does not work on directories (empty or not). Is there any way to delete empty folders in a ZIP file (prefered is buildin PHP functionality)?

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• How to trim all columns in all rows in all tables of type string?

  - by daveslab

  Hi folks, In Oracle 10g, is there a way to do the following in PL/SQL? for each table in database for each row in table for each column in row if column is of type 'varchar2' column = trim(column) Thanks!

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• R table column order when including the empty string

  - by Libo Cannici

  I have a series of value that include the empty string levels(mydata$phone_partner_products) "" "dont_know" "maybe_interesting" "not_interesting" "very_interesting" "very_not_interesting" If I make a frequencies table I get this table(mydata$phone_partner_products) dont_know maybe_interesting 3752 226 2907 not_interesting very_interesting very_not_interesting 1404 1653 1065 How can I reorder the columns in a more meaningful way? How can I rename the empty string "" level? Thank you a lot in advance.

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• error while fetching empty column from database in iphone

  - by Jaimin

  i wnant to fetch the data fromt the database but getting error when i try to get the empty column... i used the following code to do it.. NSString *aDescription = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 2)]; so if my second column is empty than i get exception

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• List with items returns empty

  - by Power-Mosfet

  I have created a simple List function but if I Loop through the List it's empty. It should not be! All, thank you for the input. problem solved // List function public class process_hook { public static List<string> pro_hook = list_all_processes(); protected static List<string> list_all_processes() { var list = new List<string>(); foreach (Process i in Process.GetProcesses(".")) { try { foreach (ProcessModule pm in i.Modules) { list.Add(pm.FileName); } } catch { } } return list; } } // call private void button1_Click(object sender, EventArgs e) { foreach (String _list in process_hook.pro_hook) { Console.WriteLine(_list); } }

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• Simple check for SELECT query empty result

  - by den-javamaniac

  Hi. Can anyone point out how to check if a select query returns non empty result set? For example I have next query: SELECT * FROM service s WHERE s.service_id = ?; Should I do something like next: ISNULL(SELECT * FROM service s WHERE s.service_id = ?) to test if result set is not empty?

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• How to get length of the longest sequence with same characters in a string?

  - by SpawnCxy

  To be specified: function getLength($str) { //function i need } $str1 = 'aabbcccc'; $str2 = 'aabbccccaaaaa'; echo getLength($str1); //will get 4 echo getLength($str2); //will get 5 Any good ideas?Thanks in advance!

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• Build comma seperated string from the struct in C#

  - by acadia

  Hello, I have the following struct in C# class public struct Employee { public const string EMPID = "EMP_ID"; public const string FName = "FIRST_NAME"; public const string LNAME = "LAST_NAME"; public const string DEPTID = "DEPT_ID"; } Is there an easy way to build a string as follows const string mainquery="INSERT INTO EMP(EMP_ID,FIRST_NAME,LAST_NAME,DEPT_ID) VALUES(:EMP_ID,:FIRST_NAME,:LAST_NAME,:DEPT_ID)" Instead of doing as follows and then concatenating it. const string EMP_COLS= EMPLOYEE.EMPID + "," + EMPLOYEE.FNAME + "," + EMPLOYEE.LNAME + "," + EMPLOYEE.DEPTID; const string EMP_Values= EMPLOYEE.EMPID + ":" + EMPLOYEE.FNAME + ":" + EMPLOYEE.LNAME + ":" + EMPLOYEE.DEPTID;

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• Empty String API arguments for actionwebservice received as "SOAP::Mapping::Object" instead of ""

  - by user311985

  I've built an API using actionwebservice and when a client calls a method to pass in an empty string (""), it's to_s value is # instead of "". But when the client passes in "hello", it's to_s value is "hello". class UsersApiController < ApiController web_service_api UserApi def create_or_update(arg1) Rails.logger.info arg1.to_s # Displays "#<SOAP::Mapping::Object:0x3a89c08>" if arg1 is an empty string end end

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• Is there a good way to remove a character from a string without copying all the characters following

  - by piemesons

  I was given an interview question: // The first example: char text[] = "henri"; char *p; p = text; *(p + 1) = 'E'; // Output = hEnri // Now If we want to remove the "e" ie hnri, we would go for????? *(p + 1)=????? The obvious answer is to copy the rest of the array "back" one position. But this seems... unpleasant. Surely there is some better way?

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• How to create empty buckets in extendible hashing

  - by Phenom

  I know how to do extendible hashing on paper, but I don't know how it's possible for empty buckets to be created. What would cause empty buckets to be created in extendible hashing? Can you show a simple example?

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• how to retrieve substring from string having variable length of character in php?

  - by user187580

  Hello I have some data in the format of C222 = 50 C1234P687 = 'some text' C123YYY = 'text' C444 = 89 C345 = 3 C122P687 = 'some text' C122YYY = 'text' .... .... so basically 3 different forms "C" number = value, example - C444 = 89 "C" number "P" number = value, example - C123P687 = 'some text' "C" number "YYY" = value Only number is of variable length on the left side of (=) sign. Values vary. I want to store the data in db as INSERT INTO datatable c_id = "number after C" p_id = "number after P" // if it exists for a line of data value = 'value' yyy = 'value' Any ideas how to retrieve these numbers? Thanks

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• In C, how do I check if a String contains 2 digits, 1 letter and 4 digits?

  - by Andy

  In the method I've tried this: int 1, 2, 4, 5, 6, 7; char 3; char display[10]; scanf("%d%d%c%d%d%d%d", &1, &2, &3, &4, &5, &6, &7); display = {1, 2, 3, 4, 5, 6, 7}; But I get errors everywhere and it doesn't work.

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• What is the most efficient way to detect if a string contains a number of consecutive duplicate char

  - by silent

  For example, a user entered "I love this post!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" the consecutive duplicate exclamation mark "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" should be detected.

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• How do I replace everything with one? (in a string) In Pythong

  - by alex

  Suppose I have this: My---sun--is------very-big---. I want to replace all multiple hyphens with just one hyphen.

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• Evaluate empty or null JSLT c tags

  - by user338381

  How can I validate a String null or empty using the c tags of JSLT. I have a variable of name var1 and I can display it, but I want to add a comparator for validate it. I want to validate when is different of null or empty (my values are string).

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• How do I check whether a string begins with "GET " or "POST " in c?

  - by user198729

  Pay attentions that there is a space in it. Which function can I use?

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• What is the most efficient way to detect if a string contains a of number of consecutive duplicate c

  - by silent

  For example, a user entered "I love this post!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" the consecutive duplicate exclamation mark "!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!" should be detected.

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• Please suggest what is wrong with this string reversal fucntion(C++)?

  - by AKS

  This code is compiling clean. But when I run this, it gives exception "Access violation writing location" at line 9. void reverse(char *word) { int len = strlen(word); len = len-1; char * temp= word; int i =0; while (len >=0) { word[i] = temp[len-1]; //line9 ++i;--len; } word[i] = '\0'; }

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• how to empty() live ajax?

  - by Y.G.J

  i have ("#sendbid").live("click", function() { //here will be the ajax //after success: ("#personaltab").empty(); }) the personaltab is in the original code. the content is created on ajax and then when the user continue i want to check with live and empty the div not working - i have tried it all!!!

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• "(Empty)" text "literally" instead of "" in datacolumn from visual studio

  - by user335620

  Hi folks. I've always have a problem with big datasets created through the dataset designer in visual studio (2005). When the dataset many tables with many columns, the columns defined like "(Empty)" in the NULL VALUE property starts showing the text "(Empty)" literally. Is anyone aware of this? or is just me? Thanks in advance.

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• Return an empty C-String

  - by Evorlor

  Simple Question: How do you return an empty C-String with as little code as possible? I have code that needs to return an empty char*. I am looking for something along the lines of return "";. I know there are several ways to do this, but I am looking for the most efficient way possible. Using return ""; gives warning: conversion from string literal to 'char *' is deprecated [-Wdeprecated-writable-strings] Thanks!

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• Ubuntu 12.4 compiz - disable all compiz plugin - empty screen

  - by gotqn

  A friend of mine has installed on my new machine Ubuntu 10.4 (I have always been windows user and have no experience with Linux). I started to watch some tutorial about how to make 'Rotated Cube' using 'Compiz',but the cube appears in the form of a list (only two slides). I have thought this could be result of my video cards (only two - one from the processor and one from the motherboard) and they can not support this options. Anyway, I have decided to disable all compiz plugins and options because my friend has set some, and I started to think there is some misunderstanding between the plugins. After, that I got only empty screen(no menu, no icons, anything) and can do nothing. How to fix this? EDIT: When I remove the compiz stuffs (from the console), the menu is shown again. Then I install the compiz again (some of the effect are still not working). After restart or log out/in the menu is hidden again. I suppose that there are some settings that I've broken but they are saved somewhere in the system and remove the compiz do not deleted them and as a result they are activated after compiz is installed again and the PC is restarted?

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