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Full Discussion: The n-queens problem
The Lounge War Stories The n-queens problem Post 302839479 by figaro on Thursday 1st of August 2013 05:38:15 PM
Old 08-01-2013
The n-queens problem

Our first computer science semester involved programming recursively. The teacher riled against the fact that we were learning our programming skills on an old DEC-VAX machine. He therefore challenged us to bring the system to its knees using a program of our choice, because he argued it would confront the university directors with the fact that the machine needed replacement with something more modern and stable.
So a co-ed of mine and I set out to program the n-queens problem, recursively mind you, and gradually increased the value of n. At some point we felt the calculations were taking too long and still in hope that we would finally meet the challenge, we stepped into the teacher's office. Unfortunately the teacher we were supposed to see wasn't there, but his colleague was, who was also less than impressed with our initiative. He told us off by saying that the machine should be used by other people too. The machine was still in use after 2 semesters of computer science classes.

Last edited by figaro; 08-01-2013 at 08:01 PM..
 

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mcxquery(1)						    BSD General Commands Manual 					       mcxquery(1)

NAME
mcxquery -- Managed Client (MCX) compositor query tool SYNOPSIS
mcxquery [options] [-user recordName] [-group recordName] [-computer spec] options: -o path Writes output to a file at the specified path. -format space | tab | xml Specifies the format of the output. -computerOnly Ignore values for -user and -group. -useCache Return the cached computer settings in the local node if they are available. -raw Dumps Directory Service data for records contributing to managed preferences. -forApple Convenience for specifying options when sending bug reports to Apple. Currently enables "-raw" and "-for- mat xml". See usage example below. DESCRIPTION
mcxquery is a utility to determine the effective managed preferences for a user logging in to a workgroup from a specific computer. -user Specify the short name of the user record to read managed preferences from. If this parameter is omitted, or a value of "=" speci- fied, the short name of the currently logged in console user will be used. -group Specify the short name of the group record to read managed preferences from. A value of "=" may be specified to mean the name of the workgroup (if any) chosen for the current login session. -computer Specify the computer record to read managed preferences from. The computer can be specified using either an Ethernet MAC address (e.g. "11:22:33:44:55:66"), a Hardware UUID (e.g. "00112233-4455-6677-8899-AABBCCDDEEFF") or the short name of the computer record itself (e.g. "lab1_12"). If this parameter is omitted, or a value of "=" specified, the record for the current computer will be used. EXAMPLES
mcxquery -user jane -group science -computer lab1_12 Displays the managed preferences that would be in effect if user "jane" logged in using workgroup "science" from the computer speci- fied in the "lab1_12" computer record. mcxquery -user jane -group science -computer 11:22:33:44:55:66 Displays the managed preferences that would be in effect if user "jane" logged in using workgroup "science" from a computer with an Ethernet MAC address of 11:22:33:44:55:66. mcxquery -user = -group = -computer guest Displays the managed preferences that would be in effect if the current user logged in using the current workgroup into a computer not specified by any computer record (i.e. a "guest" computer). mcxquery -user jane -group math Displays the managed preferences that would be in effect if the user "jane" logged into the "math" workgroup on the current com- puter. mcxquery -o /tmp/report.txt -format xml -user jane Writes the managed preferences that would be in effect if user "jane" logged into the current computer without a workgroup. The report is written in XML format to /tmp/report.txt. mcxquery -computerOnly -computer lab1_12 Displays the managed preferences for the computer specified in the "lab1_12" computer record only. Useful for determining managed settings when computer is at login window. mcxquery -computerOnly -computer 00112233-4455-6677-8899-AABBCCDDEEFF Displays the managed preferences for the computer with the Hardware UUID "00112233-4455-6677-8899-AABBCCDDEEFF". Supported on Mac OS X 10.6 and later. mcxquery -forApple -o results.plist Creates a plist, suitable for submitting along with bug reports to Apple, containing the managed preferences for the current user on the current computer. Also includes relevant records from Directory Services. Supported on Mac OS X 10.7 and later. SEE ALSO
dscl(1) MacOSX November 30, 2010 MacOSX
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