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  • Creating a Haskell Empty Set

    - by mvid
    I am attempting to pass back a Node type from this function, but I get the error that empty is out of scope: import Data.Set (Set) import qualified Data.Set as Set data Node = Vertex String (Set Node) deriving Show toNode :: String -> Node toNode x = Vertex x empty What am I doing wrong?

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  • Empty String Check in Trigger

    - by Asim Sajjad
    How can I check the empty string in triggers <Trigger Property="Source" SourceName="ControlName" Value=""> <Setter Property="Height" Value="0" TargetName="ControlName" /> </Trigger> I have set the Height of the Control to 0 if the source of the imageControl is empty stirnr or not set? How can I do it, Basically If the image is not set then I want to hide the image control in the template. thanks in advance.

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  • jquery plugin loading empty sometimes

    - by Anders Kitson
    I am running this coda-slider script from http://www.ndoherty.biz/ Not Everytime, but quite often on the first load the coda slider box will be empty and the slider wont work, most of the time my image will be there and the slider will run since I have it set on auto. I am not quite sure why this happens. I seem to have had this happen to me with other jquery stuff just loading empty or super tiny images, anyone else seen this issue.

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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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  • 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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  • 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 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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  • 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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  • 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 to get rid of empty elements

    - by user295189
    I have an array thats generated dynamically and it has some empty elements. How do I get rid of empty elements from an array? array 0 = string '' (length=0) 1 = string 'x%6wm' (length=5) 2 = string 'x%6wmvf' (length=7) 3 = string 'x%645' (length=5) 4 = string '' (length=0) And I want it to become like array 0 = string 'x%6wm' (length=5) 1 = string 'x%6wmvf' (length=7) 2 = string 'x%645' (length=5) Thanks

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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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  • 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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  • Xvnc4 started from xinetd only displays empty gray X screen

    - by Scott Thomason
    Hi. I'm attempting to setup an Ubuntu 10.10 box so that anyone can connect to port 5900 and be greeted by the gdm login manager. To do so, I added a vnc entry in /etc/services and I am starting Xvnc4 using this xinetd config file: service vnc { protocol = tcp socket_type = stream wait = no user = nobody server = /usr/bin/Xvnc server_args = -geometry 1000x700 -depth 24 -broadcast -inetd -once -securitytypes None } This kind of works...I can start multiple sessions all to port 5900, and I get an X screen. The problem is that I only get an empty, gray X screen with no applications started. I know when you run vncserver from the command line it will look to your ~/.vnc/ directory for your passwd and xstartup files, and I think what I want to do is put "gnome-session" into the xstart file. However, which xstartup file? The running user is "nobody" who obviously doesn't have a ~/.vnc/ directory. I tried a /root/.vnc/xstartup file and a ~scott/.vnc/xstartup file and it doesn't look like they were even read. I changed the xinetd vnc service so that it would "strace" Xvnc4. I looked thru all the "open" lines and didn't get a clue as to what file it was trying to read for xstart. Can anyone help? I just want a terminal server where the user is presented with a gdm login screen.

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  • auth.log is empty (Ubuntu)

    - by Vinicius Pinto
    The /var/log/auth.log file in my Ubuntu 9.04 is empty. syslogd is running and /etc/syslog.conf content is as follows. Any help? Thanks. # /etc/syslog.conf Configuration file for syslogd. # # For more information see syslog.conf(5) # manpage. # # First some standard logfiles. Log by facility. # auth,authpriv.* /var/log/auth.log *.*;auth,authpriv.none -/var/log/syslog #cron.* /var/log/cron.log daemon.* -/var/log/daemon.log kern.* -/var/log/kern.log lpr.* -/var/log/lpr.log mail.* -/var/log/mail.log user.* -/var/log/user.log # # Logging for the mail system. Split it up so that # it is easy to write scripts to parse these files. # mail.info -/var/log/mail.info mail.warning -/var/log/mail.warn mail.err /var/log/mail.err # Logging for INN news system # news.crit /var/log/news/news.crit news.err /var/log/news/news.err news.notice -/var/log/news/news.notice # # Some `catch-all' logfiles. # *.=debug;\ auth,authpriv.none;\ news.none;mail.none -/var/log/debug *.=info;*.=notice;*.=warning;\ auth,authpriv.none;\ cron,daemon.none;\ mail,news.none -/var/log/messages # # Emergencies are sent to everybody logged in. # *.emerg * # # I like to have messages displayed on the console, but only on a virtual # console I usually leave idle. # #daemon,mail.*;\ # news.=crit;news.=err;news.=notice;\ # *.=debug;*.=info;\ # *.=notice;*.=warning /dev/tty8 # The named pipe /dev/xconsole is for the `xconsole' utility. To use it, # you must invoke `xconsole' with the `-file' option: # # $ xconsole -file /dev/xconsole [...] # # NOTE: adjust the list below, or you'll go crazy if you have a reasonably # busy site.. # daemon.*;mail.*;\ news.err;\ *.=debug;*.=info;\ *.=notice;*.=warning |/dev/xconsole

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  • Xvnc4 started from xinetd only displays empty gray X screen

    - by Scott Thomason
    I'm attempting to setup an Ubuntu 10.10 box so that anyone can connect to port 5900 and be greeted by the gdm login manager. To do so, I added a vnc entry in /etc/services and I am starting Xvnc4 using this xinetd config file: service vnc { protocol = tcp socket_type = stream wait = no user = nobody server = /usr/bin/Xvnc server_args = -geometry 1000x700 -depth 24 -broadcast -inetd -once -securitytypes None } This kind of works...I can start multiple sessions all to port 5900, and I get an X screen. The problem is that I only get an empty, gray X screen with no applications started. I know when you run vncserver from the command line it will look to your ~/.vnc/ directory for your passwd and xstartup files, and I think what I want to do is put "gnome-session" into the xstart file. However, which xstartup file? The running user is "nobody" who obviously doesn't have a ~/.vnc/ directory. I tried a /root/.vnc/xstartup file and a ~scott/.vnc/xstartup file and it doesn't look like they were even read. I changed the xinetd vnc service so that it would "strace" Xvnc4. I looked thru all the "open" lines and didn't get a clue as to what file it was trying to read for xstart. Can anyone help? I just want a terminal server where the user is presented with a gdm login screen.

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