computer-science

Confused between Temporal and Spatial locality in real life code

由 杀马特。学长 韩版系。学妹 提交于 2019-12-20 10:34:27
问题 I was reading this question, I wanted to ask more about the code that he showed i.e for(i = 0; i < 20; i++) for(j = 0; j < 10; j++) a[i] = a[i]*j; The questions are, I understand temporal locality, I think that references to i and j should be temporal locality. Am I right? I also understand spatial locality, as the question I linked answers that references to a[i] should be spatial locality. Am I right? The person said, "The inner loop will call same memory address when accessing a[i] ten

How to create an ontology in python? [closed]

由 半腔热情 提交于 2019-12-20 09:37:58
问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 11 months ago . Are there libraries or certain "techniques" that you can use to create an ontology of elements? Or "design patterns"? I am talking about just a "graph" of things. Suppose I have a bunch of words. Certain words are "under" other words or "related" to other words. I need a good way to group them and know their

Why do computers work in binary?

由 你。 提交于 2019-12-20 09:23:33
问题 I have done some searching but have not found a truly satisfactory answer. As a developer i want to invest the necessary time in understanding this, thus i am looking for a complete explanation on this and feel free to provide any useful references. Thanks. 回答1: I would recommend buying this book by Andrew S. Tanenbaum. He developed one of the predecessors to Linux called Minix. I used Structured Computer Organization as part of my university course. Why computers use binary is not just a

Dynamic programming - Coin change decision

由 随声附和 提交于 2019-12-20 09:13:28
问题 I'm reviewing some old notes from my algorithms course and the dynamic programming problems are seeming a bit tricky to me. I have a problem where we have an unlimited supply of coins, with some denominations x1, x2, ... xn and we want to make change for some value X. We are trying to design a dynamic program to decide whether change for X can be made or not (not minimizing the number of coins, or returning which coins, just true or false). I've done some thinking about this problem, and I

What is the big deal about Big-O notation in computer science?

由 南楼画角 提交于 2019-12-20 08:45:21
问题 How would Big-O notation help in my day-to-day C# programming? Is it just an academic exercise? 回答1: Big-O tells you the complexity of an algorithm in terms of the size of its inputs. This is essential if you want to know how algorithms will scale. If you're designing a big website and you have a lot of users, the time it takes you to handle those requests is important. If you have lots of data and you want to store it in a structure, you need to know how to do that efficiently if you're

Explain the proof by Vinay Deolalikar that P != NP [closed]

由 前提是你 提交于 2019-12-20 08:29:07
问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 2 years ago . Recently there has been a paper floating around by Vinay Deolalikar at HP Labs which claims to have proved that P != NP. Could someone explain how this proof works for us less mathematically inclined people? 回答1: I've only scanned through the paper, but here's a rough summary of how it all hangs together. From

Missing number(s) Interview Question Redux

由 ♀尐吖头ヾ 提交于 2019-12-20 08:19:39
问题 The common interview problem of determining the missing value in a range from 1 to N has been done a thousand times over. Variations include 2 missing values up to K missing values. Example problem: Range [1,10] (1 2 4 5 7 8 9 10) = {3,6} Here is an example of the various solutions: Easy interview question got harder: given numbers 1..100, find the missing number(s) My question is that seeing as the simple case of one missing value is of O(n) complexity and that the complexity of the larger

ASP.net PageMethods return undefined

由 走远了吗. 提交于 2019-12-20 05:17:27
问题 Hi everyone i trying to get data from cs to js using ToolkitScriptManager. this is my aspx : <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title></title> <script src="../assets/lib/jquery/jquery-2.0.3.js" type="text/javascript"></script> <script> $(window).load(function () { alert(PageMethods.isConnected()); }); </script> </head> <body> <form id="form1" runat="server"> <asp:ToolkitScriptManager runat="Server" EnablePageMethods="true" EnablePartialRendering="true" /> <div>

Understanding Structural Equivalence

由 亡梦爱人 提交于 2019-12-20 03:08:33
问题 I have two types of structural equivalence ideas I am struggling to understand. VAR_1 = int VAR_2 = pointer to VAR_1 So here, I feel like they are structurally equivalent because the types would technically be both pointing to an integer type, correct? but then if you had something like VAR_3 = pointer to int Does the pointer to an int versus an integer declaration make them inequivalent? I am thinking that VAR_1 and VAR_2 are structually equivalent because they contain the same data in the

How can I fold .cs files inside .xaml files in Visual Studio 2010?

由 Deadly 提交于 2019-12-19 05:14:09
问题 How can I put my ViewModel file (a .cs file) folded inside its corresponded View file (a .xaml file) file like in the image? 回答1: I don't know of a way to do it in visual studio, but you can edit your .csproj file in a text editor. You should find something like this: <Page Include="MainWindow.xaml"> <Generator>MSBuild:Compile</Generator> <SubType>Designer</SubType> </Page> <Compile Include="MainWindow.xaml.cs"> <DependentUpon>MainWindow.xaml</DependentUpon> <SubType>Code</SubType> </Compile>
订阅 computer-science