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Published on 2010-04-08T07:26:21Z
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this is similar to the subset sum problem but the subset has to be a certain length. need a recursive function
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;; structure representing homework points
;; nr: number - the number of the homework
;; points: number - the number of points reached
(define-struct homework (nr points))
;; parse-homework: (list of number pairs) -> (list of homework)
;; The procedure takes a list of number pairs and produces…
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Okay so I have started a new language in class. We are learning Scheme and i'm not sure on how to do it. When I say learning a new language, I mean thrown a homework and told to figure it out. A couple of them have got me stumped.
My first problem is:
Write a Scheme function that returns true (the…
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I'm very new to Unix, and currently taking a class learning the basics of the system and its commands.
I'm looking for a single command line to list off all of the user home directories in alphabetical order from the /etc/passwd directory. This applies only to the home directories, and not the contents…
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Hi,
For a school project i need to write or use a online programming editor. It is a part of a bigger project. I thought of a java application, php/html/javascript or flash.
I have a couple of things i could do:
Find a good working application and edit it so it works with the rest of the project
Find…
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Consider a disk file containing 100 records
a. How many comparisons would be required on the average to find a record using sequential search, if the record is known to be in the file?
I figured out that this is 100/2 = 50.
b. If the record has a 68% probability of being in the file, how many comparisons…
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As far as I understand the specs, the ETag, which was introduced in RFC 2616 (HTTP/1.1) is a predecessor of the Last-Modified-Header, which is proposet to give the software-architect more controll over the cache-revalidating process.
If both Cache-Validation-Headers (If-None-Match and If-Modified-Since)…
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I am working with the Telerik Winforms Radgrid version 2009.2.9.701 in visual studio 2008 (C#) and I've come across and issue I can't seem to find a solution for.
When the radgrid is populated and the user changes a cell within a row, the row is not flagged as "modified" until the user actually clicks…
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I'm looking for a best possible caching/expires configuration for my specific situation.
I realize that some sites have advocated turning etags off: Header unset ETag, FileETag None
I know that I should use either Expires or Cache-Control. In additions, I know that I should use either Last-modified…
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I am looking for a way to save a search that includes a relative date. Specifically I am looking for a way to save a search that matches files that have a modification date that is 7 days ago.
I have read the Windows Search Advanced Query Syntax document and I am not seeing a way to say 7 days ago…
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Dropbox is taking hours to sync, I can't tell exactly how long because the time stamps on the website make no sense - they say the files were modified. . . tomorrow. Actually my netbook (windows xp) says they're last modified tomorrow in windows explorer as well. It's bizarre.
The time and date on…
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