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  • Control flow graph & cyclometric complexity for folowing procedure

    - by softyGuy
    insertion_procedure (int a[], int p [], int N) { int i,j,k; for (i=0; i<=N; i++) p[i] = i; for (i=2; i<=N; i++) { k = p[i]; j = 1; while (a[p[j-1]] > a[k]) {p[j] = p[j-1]; j--} p[j] = k; } } I have to find cyclometric complexity for this code and then suggest some white box test cases and black box test cases. But I am having trouble making a CFG for the code. Would appreciate some help on test cases as well. Thanks a bunch in advance!

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  • Controlling LaTeX column flow

    - by hdhermans
    What I'm trying to do: I have a page that consists of pairs of two sentences each. The pairs are separated by a whole line break. My problem is that when I have an odd number of pairs, the second sentence will automatically be placed on the next column. How can I use LaTeX to make block structures that multicol does not ignore, to keep the two sentences together? If there's better code to solve this problem, or a better column implementation (though I don't believe I can use \twocolumn in the document declaration), please post it. My current code: \documentclass{article} \usepackage{fullpage} \usepackage{multicol} \setlength{\parindent}{0pt} \setlength{\parskip}{\baselineskip} \newcommand{\pair}[2]{ \emph{#1}\\* #2 } \begin{document} \begin{multicols}{2} \pair{Sentence 1.}{Sentence 2.} \pair{Sentence 2 (pair 2).}{Sentence 2 (pair 2).} \pair{The last pair, first sentence.}{Last sentence.} \end{multicols} \end{document} This generates: http://img541.imageshack.us/img541/3444/columns.png . The second pair is what I am trying to avoid.

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  • Translate imperative control flow with break-s/continue-s to haskell

    - by dorserg
    Consider the following imperative code which finds the largest palindrome among products of 3-digit numbers (yes, it's the one of the first tasks from "Project of [outstanding mathematician of 18th century]" site): curmax = 0 for i in range(999,100): for j in range(999,100): if ((i*j) < curmax): break if (pal(i*j)): curmax = i*j break print curmax As I'm learning Haskell currently, my question is, how do you translate this (and basically any imperative construct that contains something more complex than just plain iteration, e.g. breaks, continues, temporary variables and all this) to Haskell? My version is maxpal i curmax | i < 100 = curmax | otherwise = maxpal (i-1) (innerloop 999) where innerloop j | (j < 100) || (p < curmax) = curmax | pal p = p | otherwise = innerloop (j-1) where p = i*j main = print $ maxpal 999 0 but this looks like we're still in imperative uglytown. So what could you advise, what are the approaches of dealing with such cases FP-style?

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  • How can HAProxy improve availibility, or "how can I prevent my site from going down"? [closed]

    - by Joe Hopfgartner
    I am aware of what HAProxy does, but what if my HAproxy goes down? Or what if my DNS servers go down? Yes, dns is less the problem. However dns only solves to an IP and an IP is announced via BGP to be routed over some router. What if that router goes down? Of course if I have complicated application servers that are likely to fail HAProxy can significantly improve uptime. But my application isnt. In fact my application may very well just be delivering a small static html file via HTTP. Basically if any user anywhere types in MYDOMAIN.COM, I want the user to get SOMETHING on the screen other than a timeout or DNS resolution error. How can I do that? The point of entry is difficult. The so called "initial closure mechanism".

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  • fail2ban iptable rule wont block

    - by Termiux
    So I set up fail2ban on my Debian 7 server, still I've been getting hit a lot and I dont know why is not blocking properly. The regex works, it recognizes the attempts but it seems the iptables rules it insert wont work, this is how it look iptables ouput looks after fail2ban tries to block. Chain INPUT (policy ACCEPT) num target prot opt source destination 1 fail2ban-courierauth tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:25 2 fail2ban-couriersmtp tcp -- 0.0.0.0/0 0.0.0.0/0 tcp dpt:25 3 sshguard all -- 0.0.0.0/0 0.0.0.0/0 Chain FORWARD (policy ACCEPT) num target prot opt source destination Chain OUTPUT (policy ACCEPT) num target prot opt source destination Chain fail2ban-courierauth (1 references) num target prot opt source destination 1 DROP all -- 216.x.y.z 0.0.0.0/0 2 RETURN all -- 0.0.0.0/0 0.0.0.0/0 Chain fail2ban-courierimap (0 references) num target prot opt source destination 1 RETURN all -- 0.0.0.0/0 0.0.0.0/0 Chain fail2ban-courierpop3 (0 references) num target prot opt source destination 1 RETURN all -- 0.0.0.0/0 0.0.0.0/0 Chain fail2ban-couriersmtp (1 references) num target prot opt source destination 1 RETURN all -- 0.0.0.0/0 0.0.0.0/0 Chain fail2ban-postfix (0 references) num target prot opt source destination 1 RETURN all -- 0.0.0.0/0 0.0.0.0/0 Chain fail2ban-sasl (0 references) num target prot opt source destination 1 RETURN all -- 0.0.0.0/0 0.0.0.0/0 In the iptables above you can see the "Chain fail2ban-courierauth" rule that added the drop rule for the ip but Im still able to connect!! I can still connect to the server, why isn't it blocking?

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  • Can Grails exceptionHandler support the following Error Handling Flow

    - by Andrew
    In my rails app that I am porting to grails whenever an unexpected error occurs I intercept the error automatically and display a form to the user informing them that an error has occured and asking them for further information. Meanwhile, as the form is rendered I write the stack trace and other information about who was logged in to a database table. Then if the form is submitted I add that information to the error report. I cannot tell from the exceptionHandler documentation and BootStrap examples whether that will allow me to grab all the information including various session and request parameters and then stuff them into a database and then post a form. Any thoughts?

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  • Direct flow depending on incoming dynamic type

    - by Improfane
    I have a listener class that accepts GUI change events in one method. The incoming event objects have a superclass of a type of GUI Event, the behaviour should depend on the dynamic type of the incoming variable. I wanted to do do lots of methods like: handleGUIEvent(EventChangedX event) handleGUIEvent(EventChangedY event) I am using a single event listener and receiving objects of various types but the behaviour should be different for each. What would you do? I do not want to use a switch statement as this would get unmaintainable.

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  • odd url, and difficulty in following the php page flow

    - by sdfor
    I'm trying to understand code that I bought so I can modify it. In the index.php there are picture links: <a href="test10,10"><img title="" border=1 src="makethumb.php?pic=product_images/test101.jpg&amp;w=121&amp;sq=N" / ></a> I don't understand the href since it is not pointing to a page. test10 is an id of a picture. I assumed it was going back to the index.php and the code would extract the test10,10 from the url, but it's not. I know that because I put in trace code as the first line. The question is, where is the link going to? I know it that it somewhere in the process it executes a page called profile.php, but nowhere in the source code (doing a global search) is there an explicit call to profile.php. As a related question, is there a way to profile the code to see what pages it's calling without using xdebug, which for the life of me I can't get working after many hours of trying every suggestion I found here and else where. (I'm using xampp) thanks

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  • How to get a debug flow of execution in C++

    - by Rich
    Hi, I work on a global trading system which supports many users. Each user can book,amend,edit,delete trades. The system is regulated by a central deal capture service. The deal capture service informs all the user of any updates that occur. The problem comes when we have crashes, as the production environment is impossible to re-create on a test system, I have to rely on crash dumps and log files. However this doesn't tell me what the user has been doing. I'd like a system that would (at the time of crashing) dump out a history of what the user has been doing. Anything that I add has to go into the live environment so it can't impact performance too much. Ideas wise I was thinking of a MACRO at the top of each function which acted like a stack trace (only I could supply additional user information, like trade id's, user dialog choices, etc ..) The system would record stack traces (on a per thread basis) and keep a history in a cyclic buffer (varying in size, depending on how much history you wanted to capture). Then on crash, I could dump this history stack. I'd really like to hear if anyone has a better solution, or if anyone knows of an existing framework? Thanks Rich

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  • swing layout: vertical flow

    - by pstanton
    Hi All, What LayoutManager should I use to achieve a transposed version of FlowLayout? Essentially, I want a vertical list which occupies multiple columns if it can't fit all of it's components within one column. +------------------------+ | item 1 | | item 2 | | item 3 | | item 4 | | item 5 | | item 6 | | item 7 | | item 8 | +------------------------+ or +------------------------+ | item 1 item 7 | | item 2 item 8 | | item 3 | | item 4 | | item 5 | | item 6 | +------------------------+

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  • How to force certain traffic through GRE tunnel?

    - by wew
    Here's what I do. Server (public internet is 222.x.x.x): echo 'net.ipv4.ip_forward=1' >> /etc/sysctl.conf sysctl -p iptunnel add gre1 mode gre local 222.x.x.x remote 115.x.x.x ttl 255 ip add add 192.168.168.1/30 dev gre1 ip link set gre1 up iptables -t nat -A POSTROUTING -s 192.168.168.0/30 -j SNAT --to-source 222.x.x.x iptables -t nat -A PREROUTING -d 222.x.x.x -j DNAT --to-destination 192.168.168.2 Client (public internet is 115.x.x.x): iptunnel add gre1 mode gre local 115.x.x.x remote 222.x.x.x ttl 255 ip add add 192.168.168.2/30 dev gre1 ip link set gre1 up echo '100 tunnel' >> /etc/iproute2/rt_tables ip rule add from 192.168.168.0/30 table tunnel ip route add default via 192.168.168.1 table tunnel Until here, all seems going right. But then 1st question, how to use GRE tunnel as a default route? Client computer is still using 115.x.x.x interface as default. 2nd question, how to force only ICMP traffic to go through tunnel, and everything else go default interface? I try doing this in client computer: ip rule add fwmark 200 table tunnel iptables -t mangle -A OUTPUT -p udp -j MARK --set-mark 200 But after doing this, my ping program will timeout (if I not doing 2 command above, and using ping -I gre1 ip instead, it will works). Later I want to do something else also, like only UDP port 53 through tunnel, etc. 3rd question, in client computer, I force one mysql program to listen on gre1 interface 192.168.168.2. In client computer, there's also one more public interface (IP 114.x.x.x)... How to forward traffic properly using iptables and route so mysql also respond a request coming from this 114.x.x.x public interface?

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  • Force save files all browsers - not open in browser window

    - by Joshc
    I'm after a simple solution to work in all browsers. For specific file types, or targeted links via a class: how can I get them to simply force download in all major browsers. I thought I found the perfect solution for apachce server - by adding this into the .htaccess. http://css-tricks.com/snippets/htaccess/force-files-to-download-not-open-in-browser/ AddType application/octet-stream .csv AddType application/octet-stream .xls AddType application/octet-stream .doc AddType application/octet-stream .avi AddType application/octet-stream .mpg AddType application/octet-stream .mov AddType application/octet-stream .pdf Seems to work in Firefox and Safari, but not chrome or IE (have not tested anything else) Can any one please help me with a solution on how to make links to force download the file, instead of opening in the browser, for ALL browsers. I can't seem to find a full browser proof solution. Is it not possible? Any links to tutorial or snippets would be awesome. My website if PHP based so can make it work with PHP if posible. Thanks

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  • How do I force SSL for some URLs and force non-SSL for all others?

    - by brad
    I'd like to ensure that certain URLs on my site are always accessed via HTTPS while all other URLs are accessed via HTTP. I can get either case working in my .htaccess file, however if I enable both, then I get infinite redirects. My .htaccess file is: <IfModule mod_expires.c> # turn off the module for this directory ExpiresActive off </IfModule> Options +FollowSymLinks AddHandler application/x-httpd-php .csv RewriteEngine On RewriteRule ^/?registration(.*)$ /register$1 [R=301,L] # Force SSL for certain URL's RewriteCond %{HTTPS} off RewriteCond %{REQUEST_URI} (login|register|account) RewriteRule ^(.*)$ https://%{HTTP_HOST}%{REQUEST_URI} [R=301,L] # Force non-SSL for certain URL's RewriteCond %{HTTPS} on RewriteCond %{REQUEST_URI} !(login|register|account) RewriteRule ^(.*)$ http://%{HTTP_HOST}%{REQUEST_URI} [R=301,L] # Force files ending in X to use same protocol as initial request RewriteRule \.(gif|jpg|jpeg|jpe|png|ico|css|js)$ - [S=1] # Use index.php as the controller RewriteCond %{REQUEST_URI} !\.(exe|css|js|jpe?g|gif|png|pdf|doc|txt|rtf|xls|swf|htc|ico)$ [NC] RewriteCond %{REQUEST_URI} !^(/js.*)$ RewriteRule ^(.*)$ index.php [NC,L]

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  • force laptop mode on

    - by Vi
    root@vi-notebook:/home/vi# laptop_mode start force Laptop mode enabled, not active How to start laptop mode? It starts successfully when AC adapter is removed, but not by explicit command. The system is GNU/Linux Debian i386 squeeze (not up to date), 2.6.30-zen2-31270-gc7099db-dirty, Acer Extensa 5220.

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  • Force logout a user

    - by Mithun
    I When I logged into the machine as root and typed who to see which users are logged in, I found somebody else too logged in as root devuser pts/0 2011-11-18 09:55 (xxx.xxx.xxx.xxx) root pts/1 2011-11-18 09:56 (xxx.xxx.xxx.xxx) testuser pts/2 2011-11-18 14:54 (xxx.xxx.xxx.xxx) root pts/3 2011-11-18 14:55 (xxx.xxx.xxx.xxx) How can I force a root user at pts/3 to logout?

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