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  • Physical storage of data in Access 2007

    - by ste
    I've been trying to estimate the size of an Access table with a certain number of records. It has 4 Longs (4 bytes each), and a Currency (8 bytes). In theory: 1 Record = 24 bytes, 500,000 = ~11.5MB However, the accdb file (even after compacting) increases by almost 30MB (~61 bytes per record). A few extra bytes for padding wouldn't be so bad, but 2.5X seems a bit excessive - even for Microsoft bloat. What's with the discrepancy? The four longs are compound keys, would that matter?

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  • Why don't hardware failures show up at the programming language level?

    - by Julian Cienfuegos
    I am wondering if anyone can give my a good answer, or at least point me in the direction of a good reference to the following question: How come I have never heard of a computer breaking in a very fundamental way? How come when I declare x to be a double it stays as a double? How come there is never a short circuit that robs it of some bytes and makes it an integer? Why do we have faith that when we initialize x to 10, there will never be a power surge that will cause it to become 11, or something similar? I think I need a better understanding of memory. Thanks, and please don't bash me over the head for such a simple/abstract question.

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  • Check if the current date is between two dates + mysql select query

    - by kj7
    I have following table : id dateStart dateEnd active 1 2012-11-12 2012-12-31 0 2 2012-11-12 2012-12-31 0 I want to compare todays date in between dateStart and dateEnd. Following is my query for this : $todaysDate="2012-26-11"; $db = Zend_Registry::get("db"); $result = $db->fetchAll("SELECT * FROM `table` WHERE active=0 AND {$todaysDate} between dateStart and dateEnd"); return $result; But its not working. Any solution. Thanks in advance.

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  • In PHP how do a translate a date to numerical format not knowing the format of the string beforehand

    - by stormist
    Examples of the translations I need to do: $stringDate = "November 2009"; $output = "11/09"; $stringDate = "October 1 2010"; $output = "10/01/2010"; $stringDate = "January 2010"; $output = "01/10"; $stringDate = "January 9 2010"; $output = "01/09/2010"; Note that I do not know which format the $stringDate will be in and the lack of commas in the month day year set. Thanks for any help anyone might offer.

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  • Similar code detector

    - by Let_Me_Be
    I'm search for a tool that could compare source codes for similarity. We have a very trivial system right now that has huge amount of false positives and the real positives can easily get buried in them. My requirements are: reasonably small amount of false positives good detection rate (yeah these are going against each other) ideally with a more complex output than just a single value usable for C (C99) and C++ (C++03 and optimally C++11) still maintained usable for comparing two source files against each other usable in non-interactive mode EDIT: To avoid confusion, the following two code snippets are identical and should be detected as such: for (int i = 0; i < 10; i++) { bla; } int i; while (i < 10) { bla; i++; } The same here: int x = 10; y = x + 5; int a = 10; y = a + 5;

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  • website inserting pics

    - by onfire4JesusCollins
    Hello i am getting this error message : Object reference not set to an instance of an object. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. Exception Details: System.NullReferenceException: Object reference not set to an instance of an object. Source Error: Line 7: Line 8: Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load Line 9: UserIdValue.Text = Membership.GetUser().ProviderUserKey.ToString() Line 10: cannotUploadImageMessage.Visible = False Line 11: End Sub can someone help me with this?

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  • Problem in List<double[,]> (C#3.0)

    - by Newbie
    What is wrong with List<double> x = new List<double> { 0.0330, -0.6463, 0.1226, -0.3304, 0.4764, -0.4159, 0.4209, -0.4070, -0.2090, -0.2718, -0.2240, -0.1275, -0.0810, 0.0349, -0.5067, 0.0094, -0.4404, -0.1212 }; List<double> y = new List<double> { 0.4807, -3.7070, -4.5582, -11.2126, -0.7733, 3.7269, 2.7672, 8.3333, 4.7023,0,0,0,0,0,0,0,0,0 }; List z = new List{x,y}; Error: Argument '1': cannot convert from 'System.Collections.Generic.List' to 'double[,]' Help neded.(C#3.0)

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  • Drupal 6, how to identify active menu item by url parameters (full link), ?q=page1&filter=10

    - by OlgaV
    I have a submenu that has all items linked to the same node, but with different additional parameters, for ex: ... <li...><a href = "/?q=page1&filter=10" class = "... active">Item1</a></li> <li...><a href = "/?q=page1&filter=11" class = "... active">Item2</a></li> ... in this case all items have class 'active' and none of them has class 'active-trail'. Is there any way to identify the true active link (for styling purposes)? any suggestions will be much appreciated!

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  • Angularjs showin time portion from date time

    - by J. Davidson
    Hi I have following input which displays datetime <div ng-repeat="item in items"> <input type="text" ng-model="item.name" /> <input ng-model="item.time" /> </div> The issue i have is that time is in following format. "2002-11-28T14:00:00Z" I want to just display the time portion. For which I would have to apply filter date: 'hh:mm a' I tried ng-model="labor.start_time | date: 'hh:mm a'" Please let me know how i can show only time portion in input box showin time only. I cant use span tag as the time a user can change so have to show in input tag. Thanks

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  • complexity of algorithms

    - by davit-datuashvili
    i have question what is complexity of this algorithm public class smax{ public static void main(String[]args){ int b[]=new int[11]; int a[]=new int[]{4,9,2,6,8,7,5}; for (int i=0;i int m=0; while (m int k=a[0]; for (int i=0;i k && b[a[i]]!=1){ b[a[i]]=1; } } m++; } for (int i=0;i for (int j=0;j //result=2 4 5 6 7 8 9 } } ?

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  • Need an efficient algorithm solve this kind of complex structure

    - by Rizvan
    Problem Statement is : Given 2 Dimensional array, print output for example If 4 rows and 6 columns, output would be: 1 2 3 4 5 6 16 17 18 19 20 7 15 24 23 22 21 8 14 13 12 11 10 9 I tried it is looking like square within square but when I attempted this problem, I put so many while and if loops but didn't got exact answer. If row and columns increases how to handle it? This is not homework. I was learning solving complex structure so I need to understand it by some guidance.

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  • Quickest way to compute the number of shared elements between two vectors

    - by shn
    Suppose I have two vectors of the same size vector< pair<float, NodeDataID> > v1, v2; I want to compute how many elements from both v1 and v2 have the same NodeDataID. For example if v1 = {<3.7, 22>, <2.22, 64>, <1.9, 29>, <0.8, 7>}, and v2 = {<1.66, 7>, <0.03, 9>, <5.65, 64>, <4.9, 11>}, then I want to return 2 because there are two elements from v1 and v2 that share the same NodeDataIDs: 7 and 64. What is the quickest way to do that in C++ ? Just for information, note that the type NodeDataIDs is defined as I use boost as: typedef adjacency_list<setS, setS, undirectedS, NodeData, EdgeData> myGraph; typedef myGraph::vertex_descriptor NodeDataID; But it is not important since we can compare two NodeDataID using the operator == (that is, possible to do v1[i].second == v2[j].second)

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  • Optimizing MySQL queries with IN operator

    - by Arkadiusz Kondas
    I have a MySQL database with a fairly large table where the products are. Each of them has its own id and categoryId field where there is a category id belongs to this product. Now I have a query that pulls out products from given categories such as: SELECT * FROM products WHERE categoryId IN ( 1, 2, 3, 4, 5, 34, 6, 7, 8, 9, 10, 11, 12 ) Of course, come a WHERE clause and ORDER BY sort but not in this thing. Let's say that these products is 250k and the visits are over 100k per day. Under such conditions in the table slow_log registered weight of these queries with large generation time. Do you have any ideas how to optimize the given problem? Table engine is MyISAM.

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  • How to roeder the rows of one matrix with respect to the other matrix?

    - by user2806363
    I have two big matrices A and B with diffrent dimensions.I want to order the rows of matrix B with respect to rows of the matrix A. and add the rows with values 0 to matrix B, if that row is not exist in B but in A Here is the reproduceable example and expected output: A<-matrix(c(1:40), ncol=8) rownames(A)<-c("B", "A", "C", "D", "E") > A [,1] [,2] [,3] [,4] [,5] [,6] [,7] [,8] B 1 6 11 16 21 26 31 36 A 2 7 12 17 22 27 32 37 C 3 8 13 18 23 28 33 38 D 4 9 14 19 24 29 34 39 E 5 10 15 20 25 30 35 40 > B<-matrix(c(100:108),ncol=3) rownames(B)<-c("A", "E", "C") > B [,1] [,2] [,3] A 100 103 106 E 101 104 107 C 102 105 108 Here is the Expected output : >B [,1] [,2] [,3] B 0 0 0 A 100 103 106 C 102 105 108 D 0 0 0 E 101 104 107 > Would someone help me to implement this in R ?

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  • Easiest way to keep SSRS child elements in the same relative position when the parent is re-positioned?

    - by Mac
    I am trying to revise the layout of an SSRS report where I have several textboxes that are child elements of a rectangle. When I reposition the parent rectangle down by x, all of the child textboxes maintain the same absolute position. Their "Location" (defined relative to the parent) decreases by x. I then need to reposition the child textboxes. Additionally, if any of these ever has a negative "Location" then the parent rectangle is then repositioned back up by x. What is the easiest way to move everything in unison? I can Control-click everything and then drag them or use the arrow keys, but I want to position everything with precision and the "Location" field in the Properties window disappears when selecting more than one item. Is there a way I can avoid individually computing and typing in every "Location" value every time I have a small layout change? I am using SSRS (11.0.3360.12) within the Visual Studio 2012 Shell. Thanks!

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  • C++ array of classes

    - by nickik
    I working on a game but I have a problem with the initialization of the level. (feld is just field in german) class level{ private: feld spielfeld[10][10]; public: /* other staff */ void init_feld(); }; void level::init_feld() { for(int i=0;i!=10;i++){ for(int n=0;n!=10;n++){ spielfeld[i][n] = new feld(land, i, n); } } } The Error: Error: no match for »operator=« in »((level*)this)-level::spielfeld[i][n] = (operator new(24u), (, ((feld*))))« /home/nick/stratego/feld.h:18:11: Remark: candidate is: feld& feld::operator=(const feld&) Process terminated with status 1 (0 minutes, 0 seconds) 2 errors, 0 warnings

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  • Hibernate mysql groupe by day whith 0 entities

    - by Touhami
    I have this function i need to do that in sql (hibernate or mysql) or a java function that interpert the array of results select DAY(affaire.docCreationDate), count(affaire.docfullName) from CRMAffaireCode.AffaireClass as affaire where affaire.docfullName like 'CRMAffaire.Affaire%' and affaire.docCreationDate = '" + startDate + " 00:00:00' and affaire.docCreationDate <= '" + endDate + " 23:59:59' GROUP BY DAY(affaire.docCreationDate)" i have this entitie count in my table 2012-10-05 3 2012-10-06 0 2012-10-07 7 2012-10-08 13 2012-10-09 9 2012-10-10 0 2012-10-11 0 2012-10-12 3 the request return me this values 5 3 7 7 8 13 9 9 12 3 in this way i loose three lignes that have 0 as value, i need a request that return me this 5 3 6 0 7 7 8 13 9 9 10 0 11 0 12 3

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  • How do I do this in Python (File Manipulation)?

    - by ThinkCode
    I have a bunch of HTML files in HTML folder. Those HTML files have unicode characters which I solved by using filter(lambda x: x in string.printable, line). Now how do I write the changes back to the original file? What is the best way of doing it? Each HTML file is of 30 kb in size. 1 import os, string 2 3 for file in os.listdir("HTML/"): 4 print file 5 myfile = open('HTML/' + file) 6 fileList = myfile.readlines() 9 for line in fileList: 10 #print line 11 line = filter(lambda x: x in string.printable, line) 12 myfile.close()

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  • Row for each hour even if there is no record

    - by peku33
    I've got a trouble with creating mysql Query. My PHP script executes this query on each run: INSERT INTO Executes SET UserIp='%s' (%s is user IP) Executes table is: ExecuteId UNSIGNED BIGINT AI PRIMARY Date TIMESTAMP DEFAULT CURRENT_TIMESTAMP INDEX UserIp CHAR(24) ... | Some Columns I want to retrive number of Executes in each hour. The most obvious solution would be: SELECT COUNT(*) as ExecutesNum, DATE(Date) as D, HOUR(Date) as H GROUP BY D, H And it works, BUT it does not create rows for hours where there were no executes. What should I modify to get result like: 1 | 2012-09-01 | 14 **0 | 2012-09-01 | 15** 11 | 2012-09-01 | 16 1 | 2012-09-01 | 17

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  • putting data from a for loop into a table using matlab and fprintf

    - by user2928537
    I am trying to put the following data from my for loop into a table formatted so that there are 11 values of F in each column, with a total of 4 columns. but I am always ending up with one long column of my data instead of the four columns I want. I was wondering if there is some way to put the data into a matrix and then reshape it, but I am having trouble. Any help greatly appreciated. fprintf ('Electrostatic Forces:\n') for r = 1:4; q2 = 0: 1*10^-19: 1*10^-18; for F = coulomb(q2,r); fprintf ('%d\n',F) end end Where the code for the function coulomb is function F = coulomb (q2,r); k = 8.98*10^9; q1 = 1.6*10^-19; F = k*abs(q1*q2)/r^2; end

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  • realizing number ...how?? [closed]

    - by gcc
    i hold input like that A is char pointer A[0]=n A[1]=j A[2]=n A[3]=d . there is one number in A[] and every A[i] is important for me because what will i do in next step is determined by input in A[i] or A[n] A[j]=$ . A[i]=14(any number) . . int func(int temp) { if(temp=='n') ..do something then return 10; if(temp=='j') .. return 11; if(temp=='d') .. return 12; if(........) when temp find/realize number ,i wanna return 13; in if statement, what code should i write } how i can do }

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  • How to set up a specific registration on Database

    - by ymorenz
    I'm creating a database so I can access names of people from a university. But I would like to create a registration ID for each person like 1012607, of which the first 2 numbers would be the year (11 for 2011) and the third digit would be the semester they registered (1 in the beginning of the year and 2 in the end of the year). The other 4 digits would be incremental. I don't know how to code a prefixed number in MySQL that can change only the last 4 digits and after a year change the first 2 digits every time you have a new registration. Can someone please help me?

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  • C#: reading in a text file more 'intelligently'

    - by DarthSheldon
    I have a text file which contains a list of alphabetically organized variables with their variable numbers next to them formatted something like follows: aabcdef 208 abcdefghijk 1191 bcdefga 7 cdefgab 12 defgab 100 efgabcd 999 fgabc 86 gabcdef 9 h 11 ijk 80 ... ... I would like to read each text as a string and keep it's designated id# something like read "aabcdef" and store it into an array at spot 208. The 2 issues I'm running into are: I've never read from file in C#, is there a way to read, say from start of line to whitespace as a string? and then the next string as an int until the end of line? given the nature and size of these files I do not know the highest ID value of each file (not all numbers are used so some files could house a number like 3000, but only actually list 200 variables) So how could I make a flexible way to store these variables when I don't know how big the array/list/stack/etc.. would need to be.

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  • How to break up a table holding 100mil+ number of records?

    - by Chiao
    We're currently storing answers for 52 predefined questions for our clients in our matchmaking site. we have over 30million unique users summing up for worst case of a 52x30million rows. Of these 52 questions, 11 are required and always answered. Our previous solution was to open an answer table for each question. This solution distributed our answer rows for faster insert/delete/update. But it also caused us an unconventional programming such as dynamically opening a table each time a question is added/updated, or removing an answer table if it was to be destroyed permanently. We want to come up with a better solution for our third version but could't get very far yet. Any ideas to accomplish this in any other, perhaps a more conventional, way?

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