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• Writing lambda functions in Scala

  - by user2433237

  I'm aware that you can write anonymous functions in Scala but I'm having trouble trying to convert a piece of code from Scheme. Could anyone help me convert this to Scala? (define apply-env (lambda (env search-sym) (cases environment env (empty-env () (eopl:error 'apply-env "No binding for ~s" search-sym)) (extend-env (var val saved-env) (if (eqv? search-sym var) val (apply-env saved-env search-sym))) (extend-env-rec (p-name b-var p-body saved-env) (if (eqv? search-sym p-name) (proc-val (procedure b-var p-body env)) (apply-env saved-env search-sym)))))) Thanks in advance

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• [javascript]Where are all functions in IE?

  - by user339865

  If i want to take all functions and variables declared in my program in firefox i just iterate 'window' object. For example if i have var a=function() {}; i can use a(); or window.a(); in firefox, but not in IE. I have function iterating window object and writing all function names declared in program like that: for (smthng in window) { document.write(smthng); } works in FF, in IE there are some stuff but nothing i declare before. Any ideas?

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• Count, inner join

  - by Urosh

  I have two tables: DRIVER (Driver_Id,First name,Last name,...) PARTICIPANT IN CAR ACCIDENT (Participant_Id,Driver_Id-foreign key,responsibility-yes or no,...) Now, I need to find out which driver participated in accident where responsibility is 'YES', and how many times. I did this: Select Driver_ID, COUNT (Participant.Driver_ID)as 'Number of accidents' from Participant in car accident where responsibility='YES' group by Driver_ID order by COUNT (Participant.Driver_ID) desc But, I need to add drivers first and last name from the first table(using inner join, I suppose). I don't know how, because it is not contained in either an aggregate function or the GROUP BY clause. Please help :)

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• Automatic conversion between methods and functions in Scala

  - by fikovnik

  I would like to understand the rules when can Scala automatically convert methods into functions. For example, if I have following two methods: def d1(a: Int, b: Int) {} def r[A, B](delegate: (A, B) ? Unit) {} I can do this: r(d1) But, when overloading r it will no longer work: def r[A, B, C](delegate: (A, B, C) ? Unit) {} r(d1) // no longer compiles and I have to explicitly convert method into partially applied function: r(d1 _) Is there any way to accomplish following with the explicit conversion? def r[A, B](delegate: (A, B) ? Unit) {} def r[A, B, C](delegate: (A, B, C) ? Unit) {} def d1(a: Int, b: Int) {} def d2(a: Int, b: Int, c: Int) {} r(d1) // only compiles with r(d1 _) r(d2) // only compiles with r(d2 _) There is somewhat similar question, but it is not fully explained.

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• Need help with copy constructor for very basic implementation of singly linked lists

  - by Jesus

  Last week, we created a program that manages sets of strings, using classes and vectors. I was able to complete this 100%. This week, we have to replace the vector we used to store strings in our class with simple singly linked lists. The function basically allows users to declare sets of strings that are empty, and sets with only one element. In the main file, there is a vector whose elements are a struct that contain setName and strSet (class). HERE IS MY PROBLEM: It deals with the copy constructor of the class. When I remove/comment out the copy constructor, I can declare as many empty or single sets as I want, and output their values without a problem. But I know I will obviously need the copy constructor for when I implement the rest of the program. When I leave the copy constructor in, I can declare one set, either single or empty, and output its value. But if I declare a 2nd set, and i try to output either of the first two sets, i get a Segmentation Fault. Moreover, if i try to declare more then 2 sets, I get a Segmentation Fault. Any help would be appreciated!! Here is my code for a very basic implementation of everything: Here is the setcalc.cpp: (main file) #include <iostream> #include <cctype> #include <cstring> #include <string> #include "help.h" #include "strset2.h" using namespace std; // Declares of structure to hold all the sets defined struct setsOfStr { string nameOfSet; strSet stringSet; }; // Checks if the set name inputted is unique bool isSetNameUnique( vector<setsOfStr> strSetArr, string setName) { for(unsigned int i = 0; i < strSetArr.size(); i++) { if( strSetArr[i].nameOfSet == setName ) { return false; } } return true; } int main(int argc, char *argv[]) { char commandChoice; // Declares a vector with our declared structure as the type vector<setsOfStr> strSetVec; string setName; string singleEle; // Sets a loop that will constantly ask for a command until 'q' is typed while (1) { // declaring a set to be empty if(commandChoice == 'd') { cin >> setName; // Check that the set name inputted is unique if (isSetNameUnique(strSetVec, setName) == true) { strSet emptyStrSet; setsOfStr set1; set1.nameOfSet = setName; set1.stringSet = emptyStrSet; strSetVec.push_back(set1); } else { cerr << "ERROR: Re-declaration of set '" << setName << "'\n"; } } // declaring a set to be a singleton else if(commandChoice == 's') { cin >> setName; cin >> singleEle; // Check that the set name inputted is unique if (isSetNameUnique(strSetVec, setName) == true) { strSet singleStrSet(singleEle); setsOfStr set2; set2.nameOfSet = setName; set2.stringSet = singleStrSet; strSetVec.push_back(set2); } else { cerr << "ERROR: Re-declaration of set '" << setName << "'\n"; } } // using the output function else if(commandChoice == 'o') { cin >> setName; if(isSetNameUnique(strSetVec, setName) == false) { // loop through until the set name is matched and call output on its strSet for(unsigned int k = 0; k < strSetVec.size(); k++) { if( strSetVec[k].nameOfSet == setName ) { (strSetVec[k].stringSet).output(); } } } else { cerr << "ERROR: No such set '" << setName << "'\n"; } } // quitting else if(commandChoice == 'q') { break; } else { cerr << "ERROR: Ignoring bad command: '" << commandChoice << "'\n"; } } return 0; } Here is the strSet2.h: #ifndef _STRSET_ #define _STRSET_ #include <iostream> #include <vector> #include <string> struct node { std::string s1; node * next; }; class strSet { private: node * first; public: strSet (); // Create empty set strSet (std::string s); // Create singleton set strSet (const strSet &copy); // Copy constructor // will implement destructor later void output() const; strSet& operator = (const strSet& rtSide); // Assignment }; // End of strSet class #endif // _STRSET_ And here is the strSet2.cpp (implementation of class) #include <iostream> #include <vector> #include <string> #include "strset2.h" using namespace std; strSet::strSet() { first = NULL; } strSet::strSet(string s) { node *temp; temp = new node; temp->s1 = s; temp->next = NULL; first = temp; } strSet::strSet(const strSet& copy) { cout << "copy-cst\n"; node *n = copy.first; node *prev = NULL; while (n) { node *newNode = new node; newNode->s1 = n->s1; newNode->next = NULL; if (prev) { prev->next = newNode; } else { first = newNode; } prev = newNode; n = n->next; } } void strSet::output() const { if(first == NULL) { cout << "Empty set\n"; } else { node *temp; temp = first; while(1) { cout << temp->s1 << endl; if(temp->next == NULL) break; temp = temp->next; } } } strSet& strSet::operator = (const strSet& rtSide) { first = rtSide.first; return *this; }

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• Remove Downed Exchange Server from First Administrative Group

  - by Campo

  I had a server die. It is gone forever. It is still listed in the servers folder of the first administrative group in the Exchange System Manager. When I click "all tasks Remove Server" I get the following error: The Server "SERVERNAME" cannot be removed because: -One or more users currently use a mailbox on this server. These users must be moved to a mailbox store on a different server or be mail disabled before uninstalling this server. Facility: Exchange System Manager ID no: c103f492 Exchange System Manager Any help would be MUCH appreciated. I cannot access the mailbox stores anymore and I do not care about the lost mailboxes. We deleted the inactive and old users as well. So I am stumped on this one. I just need to remove the old machine. THANKS!

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• Unable to connect to Github for the first time

  - by MaxMackie

  This is my first time with Git and I'm trying to set it up on my box. I added my key to my profile in the Github web interface. When I try to connect... : max@linux-vwzy:~> ssh [email protected] The authenticity of host 'github.com (207.97.227.239)' can't be established. RSA key fingerprint is xx Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added 'github.com,207.97.227.239' (RSA) to the list of known hosts. PTY allocation request failed on channel 0 max@linux-vwzy:~> ssh-add ~/.ssh/id_rsa Identity added: /home/max/.ssh/id_rsa (/home/max/.ssh/id_rsa) max@linux-vwzy:~> ssh [email protected] PTY allocation request failed on channel 0 I'm supposed to be getting some kind of welcome message however, I'm not.

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• "My Documents" as the first class citizen in "Documents" in Windows 7

  - by Dennis

  In windows 7, you can have a "Document" as a menu on the "Start Menu". However, it lead to sub-items "My Documents" and "Public Documents". As well as only me is using my notebook, "Public Documents" is useless and waste me for a click to the "My Documents". So, my question is -- how do I hack the registry(without hacking DLLs) to make the contents in "My Documents" as the first class citizen in the start menu? PS. after read this, I've removed the "Public Documents" from the library. But still, it takes me one more click

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• FTP timeout only the first time

  - by user1474681

  I'm using PureFTPd on MacOSX (Snow Leopard, not server version). When trying to access the FTP account from the outside via dyndns (e.g. using https://www.wormly.com/test_ftp_server) the connection always times out the FIRST time. When I try AGAIN in the next few seconds it works. What is this about? I have forwarded the ports to my apple router and tried disabling the OSX firewall as well. Thanks for any advice. Dennis

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• Samba setup to request password reset on first time login

  - by crazybyte

  Is it possible to setup Samba to ask for password reset when the user first logs in without the need to setup a domain controller? Would this work properly with Windows clients or with clients using Linux with file managers like Krusader or Nautilus? Could somebody give me a few pointers how to implement this if is possible? I'm pretty new to Samba and I use it as a file server and I would like to have such a feature on it, but I'm not sure if it's possible. Thanks!

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• Reading PFS First Choice and Word Perfect 5 files in an XP or Windows 98 environment

  - by indyK1ng

  Hello all, My priest has 3 computers, Windows 3.1, Windows 98 and Windows XP. Recently his power supply blew out on his Windows 3.1 computer and he needs to get to the data on the hard drive. He's looking into imaging the hard drive and setting it up as a VM, which might be a bit much for him. Ignoring getting the data off the hard drive as a separate problem, are there any programs out there that can read files from PFS First Choice and Word Perfect 5. He already has Microsoft Office so solutions involving that are preferable. If he can install the software on his Windows XP or 98 computer, that would be helpful too. Thank you for your help

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• windows 2008 always keep local dns in first

  - by user3085220

  I have a windows 2008 system and it always keep ::1 in first of the dns setting. I can see the following in "ipconfig /all": DNS Servers . . . . . . . . . . . . : ::1 8.8.8.8 8.8.4.4 and "Obtain dns server address automatically" option in network interface setting is disabled. I installed active directory once and uninstalled now, I think it's the reason. But I can't find any answer from google or bing how to fix.

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• Explanation of command to uppercase the first letter of a filename

  - by hazielquake

  I'm trying to learn to rename files with the command line, and after browsing around a lot of pages I finally found a command that uppercases the first letter of a file, but the problem is that I want to understand the meaning of each command. The command is: for i in *; do new=`echo "$i" | sed -e 's/^./\U&/'`; mv "$i" "$new";done I understand the 'for' kinda... but not the 'echo' or '`' and especially the sed command. if someone has a little patience to explain the meaning of each thing that'd be awesome! Thanks!

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• Prevent Firefox from going to first search result

  - by Dejan

  When I type some terms in the address bar (not the search box!) and hit enter, Firefox searches for those terms on Google, and, depending on some logic either takes me to the search results page or takes me to the first search result. Now, I want it to always take me to the search results page (like Chrome does). Is this possible? And, yes, I am aware that the search box does exactly that, but I'm using it for some other search engine. So, another solution would be to add additional search box, that can also work for me.

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• SharePoint - force user to accept AUP when first logging in etc

  - by Chris W

  We're looking to move a bespoke intranet across to SharePoint. One query that has come up is whether we can do the following easily: When user logs in for the first time they should be forced read and accept an Acceptable Use Policy for the site. Agree a separate agreement that relates to their data being shared with other parties. (Optional) upload their profile photo. They can skip this step if they don't have one but they should be prompted to do it each time they login subsequently. The above is all nice and easy in a bespoke app but I can't see how to do this with SharePoint. Can we build a custom workflow that is tied to the user logging in? So far I can only find how to attach workflows to libraries and lists.

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• Group policy results failing with "Invalid class" error

  - by bshacklett

  When trying to run the Group Policy Results Wizard against a specific workstation, I'm getting the following error: The wizard was unable to generate the computer or user's data due to insufficient permissions. Details: Invalid class I'm guessing that the class being referred to is a WMI class, but I haven't gotten much farther. I've run sfc /scannow on the machine with no luck. I've also followed all of the recommendations in this article: http://windowsxp.mvps.org/repairwmi.htm. I cannot find anything useful in the event logs and I can't think of anywhere else I could look to find out what's really happening here. Any help would be appreciated.

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• First requests are painfully slow

  - by winSharp93

  I am running Redmine under IIS using Zoo. Installation was done using the Web Platform Installer and the default configuration has not been touched. However, when using the application, the first requests take very long to complete (sometimes more than one minute). During that time, the ruby.exe causes some CPU load (about 15%). According to the log files, it's mainly the views taking that long to render: Started GET "/redmine/login" for IP at 2012-09-04 09:54:08 +0200 Processing by AccountController#login as HTML Rendered account/login.html.erb within layouts/base (42150.5ms) Completed 200 OK in 43508ms (Views: 43008.5ms | ActiveRecord: 0.0ms) Rendered account/login.html.erb within layouts/base (42435.1ms) Completed 200 OK in 44100ms (Views: 43523.3ms | ActiveRecord: 0.0ms) After the initial delay, further request times are totally acceptable. Any ideas on how to speed up the warmup time?

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• USB port not recognising mouse on first bootup

  - by Pacifika

  On a computer here when first powered on the USB wired mouse is not recognised. The light under the mouse is not lit up. Other usb hub's and keyboards work fine. Disconnecting it and reconnecting it fixes the issue, even after a restart - after the pc is switched off for a length of time (for example overnight) the problem reappears. I swapped the mouse, updated the bios and installed updated intellimouse drivers, turned of power saving on the usb ports. Any ideas?

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• How to fix: mac keyboard ignores "first" key pressed

  - by lexu

  UPDATE 2012.03.19: the MBP described in this post is now broken and recycled (logic board fried). The replacement doesn't manifest the same problems. I tend to believe the problem originated in the keyboard firmware of the old MBP. Every now and then, usually after I haven't pressed a key in some time, sometimes minutes, sometimes seconds, my MBP will "swallow" the the first key I press ... say I'm logging into "superuser.com" .. I start typing my username and the textbox will show "exu" instead of "lexu" This is driving me nuts! My guess is the keyboard or it's controller goes to sleep and fails to wake up propperly ... What can I do about this? PS: I've already installed "MacBook, MacBook Pro Keyboard Firmware Update 1.0"

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• Page won't load on IE9 unless developer tools are started first

  - by RoyHB

  One of my pages (with very extensive javascript) won't load on IE9. It loads ok in Mozilla, Chrome, Safari and Opera. If IE9 Developer tools are running it loads fine. If I load IE9, load the developer tools (F12) then kill the developer tools it still loads fine. If developer tools are running then sometimes (but not always) the first message in the console is: HTML1113: Document mode restart from Quirks to IE9 Standards Doctype is: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> If I change doctype to and remove the xmlns nothing changes. I'm stumped. Any suggestions appreciated.

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• rsync doesn't use delta transfer on first run

  - by ockzon

  I'm trying to synchronize a large local directory (with a batch file using rsync 3.0.7 on Cygwin, Windows 7 x64, 30k files, 200gb size) to a remote server (Debian x64 with kernel 2.6, rsyncd 3.0.7) over a slow internet connection (90kbyte/s upload). I know almost all files are identical and I verified that using md5sum locally and remotely. However when executing rsync from my local machine every file gets transferred completely for the first time. When I terminate the batch file after a few transfers and run it again then the already transferred files are skipped. But as soon as it gets to a file not yet transferred it uploads the file as a whole again instead of noticing that the checksum is the same locally and remotely. The batch file calling rsync looks like this (backslashes and line brakes added here for readability): c:\cygwin\bin\rsync.exe --verbose --human-readable --progress --stats \ --recursive --ignore-times --password-file pwd.txt \ /cygdrive/d/ftp/data/ \ rsync://[email protected]:33400/data/ | \ c:\cygwin\bin\tee.exe --append rsync.log I experimented using the following parameters in varying combinations but that didn't help either: --checksum --partial --partial-dir=/tmp/.rsync-partial --compress

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• Excel Pivot table: Calculated field based on only the first row of a group

  - by Meysam

  I've got the following data and pivot table: The Total column in the pivot table is the sum of the following calculated field: =start-TIME(7, 30, 0) I know that this calculation is wrong for what I want to achieve. I need to know how much delay I have had on each day to start the work. e.g. on 1-Oct-12, assuming I should have started my work at 7:30, 8:00 - 7:30 which yields 30 minutes delay, 1 hour delay for 2-Oct-12 and 50 minutes for 3-Oct-12. So my question is, how can I have a calculated field based on only the first row of each group in a pivot table?

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• I can only see the first website alphabetically

  - by Victor

  I have 3 subdomains websites. Those are subdomain1.mydomain.com, subdomain2.mydomain.com, subdomain3.mydomain.com. I have point these to the external IP address. bind is ok, dig is onerror, Apache2 reload ok 1.) If I set the following, I can only see the first one alphabetically. NameVirtualHost *:80 <VirtualHost *:80> ServerName subdomain1.mydomain.com ... <VirtualHost *:80> ServerName subdomain2.mydomain.com ... 2.) If I set the following, I get file not found. Apache2 reload ok. NameVirtualHost mydomain.com:80 <VirtualHost mydomain.com:80> ServerName subdomain1.mydomain.com ... <VirtualHost mydomain.com:80> ServerName subdomain2.mydomain.com Please Help! What else should I do.

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• Own website fails to load first time

  - by AmazingDreams

  I have a website running on a VPS, every time I first try to load the website the connection times out. If I press try again, it loads directly. I'm not sure whether this is a DNS issue or a server issue. As far as I know everything is set up correctly. Also, it has been doing this from the moment I got this server and set up my domain name. And that's about two to three months ago. You may take a look here: http://www.wegotcha.nl/ As you can see at this moment it's just an image, there are no scripts running in the background or anything. The only error Apache gives me is that favicon.ico cannot be found. It's an Apache webserver running on Ubuntu 12.04.1 (newest version) I update all packages almost every day (apt-get update && apt-get upgrade). I am merely an amateur on the area of webservers so any help will be appreciated. :)

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• Nested IF statement on Google Spreadsheet, second part same as the first [migrated]

  - by lazfish

  I have a spreadsheet for my budget. Payments are either drawn from my bank or my Amex card and then my Amex card is drawn from my bank as well. So I add up all my monthly total like this: =sumif(I3:I20,"<>AMEX",D3:D20) Where I3:I20 = account bill is paid from and D3:D20 is monthly amount due. So I am not including bills that come from my Amex card in the total since the Amex bill itself covers those. Next I have a column that has the day of the month 1-10 (when everything gets paid) and it does this: =sumif(H3:H20,E24:E33,D3:D20) Where H3:H20 = date bill is paid and E25:E35 = range from 1-10. What I want to do is make this second part do the same check as the first. Something like this: =sumif(H3:H19,E24:E33,IF(I3:I19"<>SPG",D3:D19,0)) But I get error: "Parse error" What am I doing wrong?

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