Blog articles tagged 'programming'

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on 9/8/2011 11:11 AM
Problem The number 145 is well known for the property that the sum of the factorial of its digits is equal to 145: 1! + 4! + 5! = 1 + 24 + 120 = 145 Perhaps less well known is 169, in that it produces the longest chain of numbers that link back to [...]
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on 9/7/2011 10:09 AM
Problem Peter has nine four-sided (pyramidal) dice, each with faces numbered 1, 2, 3, 4. Colin has six six-sided (cubic) dice, each with faces numbered 1, 2, 3, 4, 5, 6. Peter and Colin roll their dice and compare totals: the highest total wins. The resul[...]
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on 9/7/2011 7:35 AM
Problem By counting carefully it can be seen that a rectangular grid measuring 3 by 2 contains eighteen rectangles: Although there exists no rectangular grid that contains exactly two million rectangles, find the area of the grid with the nearest solution[...]
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on 9/7/2011 4:09 AM
Problem In the 5 by 5 matrix below, the minimal path sum from the top left to the bottom right, by only moving to the right and down, is indicated in bold red and is equal to 2427. Find the minimal path sum, in matrix.txt (right click and ‘Save Link/Targe[...]
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on 9/6/2011 5:33 PM
Problem Comparing two numbers written in index form like 211 and 37 is not difficult, as any calculator would confirm that 211 = 2048 < 37 = 2187. However, confirming that 632382518061 > 519432525806 would be much more difficult, as both numbers contain o[...]
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on 8/22/2011 3:30 PM
SOLID and its relevance to FThere has been an increasing amount of exposure for F# and functional programming lately. If you come from an object-orientated background a change in mindset is required when working with functional programming, there is[...]
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on 7/16/2011 4:08 AM
I recently wrote an article for Developer Fusion on the changes in mindset required when moving from C# to F#. The article has proved to be more more popular than I envisaged. I think a lot of .Net developers are interested in F# but are unsure on t[...]
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on 7/3/2011 9:28 AM
One of the areas that I am very interested in is agents and I have been doing quite a lot of work in this area lately. Agents can be used for a multitude of different purposes ranging from: isolated message passing, object caching, finite state machi[...]
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on 6/5/2011 8:13 AM
Everyone knows F# agents are cool right? Well here’s yet another example of how versatile they can be… There was a series of posts last April by Stephen Toub from the pfxteam at Microsoft. I was reading through some of the posts again the other day[...]
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on 4/4/2011 1:56 PM
Ok so I have been offline for a while now, what with starting a new financial contract in London and not having any broadband access for a while. I have been working on something, honest! Since the last post I have been reflecting on the pipeline de[...]
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