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  • Opening a file with a variable as name & checking for undefined values

    - by Harm De Weirdt
    Hello everyone. I'm having some problems writing data into a file using perl. sub startNewOrder{ my $name = makeUniqueFileName(); open (ORDER, ">$name.txt") or die "can't open file: $!\n"; format ORDER_TOP = PRODUCT<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<CODE<<<<<<<<AANTAL<<<<EENHEIDSPRIJS<<<<<<TOTAAL<<<<<<< . format ORDER = @<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< @<<<<<<<< @<<<< @<<<<<< @<<<<< $title, $code, $amount, $price, $total . close (ORDER); } This is the sub I use to make the file. (I translated most of it) The makeUniqueFileName method makes a fileName based upon current time("minuteshoursdayOrder"). The problem now is that I have to write in this file in another sub. sub addToOrder{ print "give productcode:"; $code = <STDIN>; chop $code; print "Give amount:"; $amount = <STDIN>; chop $amount; if($inventory{$code} eq undef){ #Does the product exist? print "This product does not exist"; }elsif($inventory{$code}[2] < $amount && !defined($inventaris{$code}[2]) ){ #Is there enough in the inventory? print "There is not enough in stock" }else{ $inventory{$code}[2] -= $amount; #write in order file open (ORDER ">>$naam.txt") or die "can't open file: $!\n"; $title = $inventory{$code}[0]; $code = $code; $amount = $inventory{$code}[2]; $price = $inventory{$code}[1]; $total = $inventory{$code}[1]; write; close(ORDER); } %inventory is a hashtable that has the productcode as key and an array with the title, price and amount as value. There are two problems here: when I enter an invalid product number, I still have to enter an amount even while my code says it should print the error directly after checking if there is a product with the given code. The second problem is that the writing doesn't seem to work. It always give's a "No such file or directory" error. Is there a way to open the ORDER file i made in the first sub without having to make $name not local? Or just a way to write in this file? I really don't know how to start here. I can't really find much info on writing a file that has been closed before, and in a different sub.. Any help is appreciated, Harm

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  • (Action<T>).Name does not return expected values

    - by Tomas Lycken
    I have the following method (used to generate friendly error messages in unit tests): protected string MethodName<TTestedType>(Action<TTestedType> call) { return string.Format("{0}.{1}", typeof(TTestedType).FullName, call.Method.Name); } But when I call it as follows, I don't get the expected results: var nm = MethodName<MyController>(ctrl => ctrl.Create()); After running this code, nm contains "<Create_CreateShowsView>b__8", and not (as expected) "Create". How should I change the code to obtain the expected result?

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  • Hibernate 1:M relationship ,row order, constant values table and concurrency

    - by EugeneP
    table A and B need to have 1:M relationship a and b are added during application runtime, so A created, then say 4 B's created. Each B instance has to come in order, so that I could later extract them in the same order as I added them. The app will be a web-app running on Tomcat, so 10 instances may work simultaneously. So my question are: 1) How to preserve inserting order, so that I could extract B instances that A references in the same order as I persisted them. That's tricky, because we add to a Collection and then it gets saved (am I right?). So, it depends on how Hibernate saves it, what if it changes the order in what we added instances? I've seen something like LIST instead of SET when describing relationships, is that what I need? 2) How to add a 3-rd column to B so that I could differentiate the instances, something like SEX(M,F,U) in B table. Do I need a special table, or there's and easy way to describe constants in Hibernate. What do you recommend? 3) Talking about concurrency, what methods do you recommend to use? There should be no collisions in the db and as you see, there might easily be some if rows are not inserted (PK added) right where it is invoked without delays ?

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  • Sum Values in Multidimensional Array

    - by lemonpole
    Hello all. I'm experimenting with arrays in PHP and I am setting up a fake environment where a "team's" record is held in arrays. $t1 = array ( "basicInfo" => array ( "The Sineps", "December 25, 2010", "lemonpole" ), "overallRecord" => array ( 0, 0, 0, 0 ), "overallSeasons" => array ( "season1.cs" => array (0, 0, 0), "season2.cs" => array (0, 0, 0) ), "matches" => array ( "season1.cs" => array ( "week1" => array ("12", "3", "1"), "week2" => array ("8", "8" ,"0"), "week3" => array ("8", "8" ,"0") ), "season2.cs" => array ( "week1" => array ("9", "2", "5"), "week2" => array ("12", "2" ,"2") ) ) ); What I am trying to achieve is to add all the wins, loss, and draws, from each season's week to their respective week. So for example, the sum of all the weeks in $t1["matches"]["season1.cs"] will be added to $t1["overallSeasons"]["season1.cs"]. The result would leave: "overallSeasons" => array ( "season1.cs" => array (28, 19, 1), "season2.cs" => array (21, 4, 7) ), I tried to work this out on my own for the past hour and all I have gotten is a little more knowledge of for-loops and foreach-loops :o... so I think I now have the basics down such as using foreach loops and so on; however, I am still fairly new to this so bear with me! I can get the loop to point to $t1["matches"] key and go through each season but I can't seem to figure out how to add all of the wins, loss, and draw, for each individual week. For now, I'm only looking for answers concerning the overall seasons sum since I can work from there once I figure out how to achieve this. Any help will be much appreciated but please, try and keep it simple for me... or comment the code accordingly please! Thanks!

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  • F# match char values

    - by rwallace
    I'm trying to match an integer expression against character literals, and the compiler complains about type mismatch. let rec read file includepath = let ch = ref 0 let token = ref 0 use stream = File.OpenText file let readch() = ch := stream.Read() let lex() = match !ch with | '!' -> readch() | _ -> token := !ch ch has to be an int because that's what stream.Read returns in order to use -1 as end of file marker. If I replace '!' with int '!' it still doesn't work. What's the best way to do this?

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  • Decrement all int values in Dictionary

    - by Jon
    I have a Dictionary<string,int> and I simply want to decrement the value in my dictionary by one. I have this but not sure if its best practice. foreach (KeyValuePair<string, int> i in EPCs) { EPCs[i.Key] = i.Value - 1; }

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  • Best way to get distinct values from large table

    - by derivation
    I have a db table with about 10 or so columns, two of which are month and year. The table has about 250k rows now, and we expect it to grow by about 100-150k records a month. A lot of queries involve the month and year column (ex, all records from march 2010), and so we frequently need to get the available month and year combinations (ie do we have records for april 2010?). A coworker thinks that we should have a separate table from our main one that only contains the months and years we have data for. We only add records to our main table once a month, so it would just be a small update on the end of our scripts to add the new entry to this second table. This second table would be queried whenever we need to find the available month/year entries on the first table. This solution feels kludgy to me and a violation of DRY. What do you think is the correct way of solving this problem? Is there a better way than having two tables?

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  • C++ Macro problem, not replacing all values

    - by JP
    I have the following 2 macros: #define SCOPED_ENUM_HEADER(NAME) struct NAME{ enum _NAME{ #define SCOPED_ENUM_FOOTER(NAME) };}; typedef NAME::_NAME NAMEtype; Only the first instance of NAME get replaced by the passed NAME. What's wrong with it? Is is to be used in such a way: SCOPED_ENUM_HEADER(LOGLEVEL) UNSET, FILE, SCREEN SCOPED_ENUM_FOOTER(LOGLEVEL) Thanks you

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  • recvfrom() return values in Stop-and-Wait UDP?

    - by mavErick
    I am trying to implement a Stop-and-Wait UDP client-server socket program in C. As known, there are basically three possible scenarios for Stop-and-Wait flow control. i.e., After transmitting a packet, the sender receives a correct ACK and thus starts transmitting the next packet; the sender receives an incorrect ACK and thus retransmits this packet; the sender receives no ACK within a TIMEOUT and thus retransmits this packet. My idea is to differentiate these three scenarios with the return value of recvfrom() on the sender side. For scenario 1&2: recvfrom() just returns the length of the received ACK. Since in my implementation the incorrect ACK is of the same length of the correct one, so I will have to go deeper and check the contents of the ACK. It's not a big deal. I know how to do. Problems come when I am trying to recognize scenario 3 where no ACK is received. What confuses me is that my recvfrom() is within a while loop, so the recvfrom() will be called constantly. What will it return when the receiver is not actually sending the sender ACK? Is it 0 or 1?

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  • Help with enum values in registry c++

    - by vBx
    DWORD type = REG_NONE; int i = 0; size = sizeof(ValueName); size2 = sizeof(ValueData); BOOL bContinue = TRUE; do { lRet = RegEnumValue(Hkey , i , ValueName , &size , 0 , &type , ValueData , &size2); switch(lRet) { case ERROR_SUCCESS: print_values(ValueName , type , ValueData , size2); i++; size = sizeof(ValueName); size2 = sizeof(ValueData); break; case ERROR_MORE_DATA: size2 = sizeof(ValueData); if(NULL != ValueData) delete [] ValueData; ValueData = new BYTE[size2]; break; case ERROR_NO_MORE_ITEMS: bContinue = false; break; default: cout << "Unexpected error: " << GetLastError() << endl; bContinue = false; break; } }while(bContinue); it always goes to ERROR_NO_MORE_DATA ,why is that ? :-/

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  • Replace BIT values with some text

    - by nihi_l_ist
    I have a BIT column with gender (0,1) and want to replace 0 and 1 in the resulting view with the words "man" and "woman". Can i do this right in the view with some system finction or i have to write my own function to do that?

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  • How do I find matching values in a generic list

    - by TDDG
    I have anywhere from 5 to 10 generic list in an ASP.NET VB.NET web app. I would like to write a method to pass them all into, and return only the elements they all have in common. I'm looking for some ideas how to accomplish this the easiest and cleanest way possible.

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  • elegant way to extract values from array

    - by smoove666
    Something that bugs me for a long time: I want to convert this Array: // $article['Tags'] array(3) { [0] => array(2) { ["id"] => string(4) "1" ["tag"] => string(5) "tag1" }, [1] => array(2) { ["id"] => string(4) "2" ["tag"] => string(5) "tag2" }, [2] => array(2) { ["id"] => string(4) "3" ["tag"] => string(5) "tag3" }, } To this form: // $extractedTags[] array(3) { [0] => string(4) "tag1", [1] => string(4) "tag2", [2] => string(4) "tag3", } currently i am using this code: $extractedTags = array(); foreach ($article['Tags'] as $tags) { $extractedTags[] = $tags['tag']; } Is there any more elegant way of doing this, maybe a php built-in function?

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  • putting values from database into a drop down list

    - by sushant
    hi. my tool is in asp. i am using this code for a query in sql dim req_id req_id=Request.Form("Req_id") if req_id<>"" then Set conn=server.CreateObject("adodb.connection") conn.Open session("Psrconnect") Set rs=CreateObject("Adodb.Recordset") rs.Open "select * from passwords where REQ_ID='"&req_id&"'", conn i want to put the results of this query into a drop down list. how do i do it? any help is very much appreciated.

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  • display php foreach values in div

    - by San82moon
    Hi, I have foreach ($a as $key = $value) { echo $value; } which displays result one below other, like 1234 5678 2010-05-20 5678 1590 2010-05-19 but i want it in a table like structure like 1234 5678 2010-05-20 5678 1590 2010-05-19 how can i do that?

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  • Selecting distinct values from mysql with largest timestamp

    - by user987048
    I am building a mail system. The inbox is only supposed to grab the last message (one with the highest time value) of a concatenation of user and sender, where the user or sender is the user ID. Here is the table structure: CREATE TABLE IF NOT EXISTS `mail` ( `user` int(11) NOT NULL, `sender` int(11) NOT NULL, `body` text NOT NULL, `new` enum('0','1') NOT NULL default '1', `time` int(11) NOT NULL, KEY `user` (`user`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8; So, with a table with the following data: user sender new time ***************************************** 1 0 0 5 1 0 0 6 2 1 0 7 1 0 1 8 1 2 0 9 1 0 1 11 1 2 1 12 I want to select the following: WHERE USER OR SENDER = X (in this case, 1) user sender new time ***************************************** 2 1 0 7 1 2 0 9 1 0 1 11 How would I go about doing something like this?

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  • left join without duplicate values using MIN()

    - by Clipper87
    I have a table_1: id custno 1 1 2 2 3 3 and a table_2: id custno qty descr 1 1 10 a 2 1 7 b 3 2 4 c 4 3 7 d 5 1 5 e 6 1 5 f When I run this query to show the minimum order quantities from every customer: SELECT DISTINCT table_1.custno,table_2.qty,table_2.descr FROM table_1 LEFT OUTER JOIN table_2 ON table_1.custno = table_2.custno AND qty = (SELECT MIN(qty) FROM table_2 WHERE table_2.custno = table_1.custno ) Then I get this result: custno qty descr 1 5 e 1 5 f 2 4 c 3 7 d Customer 1 appears twice each time with the same minimum qty (& a different description) but I only want to see customer 1 appear once. I don't care if that is the record with 'e' as a description or 'f' as a description. How could I do this ? Thx!

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  • Oracle - Count distict values of a column

    - by Luciana Borela
    Hi I have this table: Reason|Area_Code|Id x dig 1 x dig 2 y dig 3 h util 4 x dig 5 I'm trying a sql that returns: Reason|Amount of distinct Reason|Area_code x 3 dig y 1 dig h 1 util I will use this result to plot a chart. I don´t have any ideia on how this SQL can be. Could you help me?

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  • Oracle - Count distinct values of a column

    - by Luciana Borela
    Hi I have this table: Reason|Area_Code|Id x dig 1 x dig 2 y dig 3 h util 4 x dig 5 I'm trying for a SQL that returns: Reason|Amount of distinct Reason|Area_code x 3 dig y 1 dig h 1 util I will use this result to plot a chart. I don´t have any idea on how this SQL can be done. Could you help me?

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  • Get CCK values, without the html in Drupal templates

    - by DasRakel
    I'm storing a string in a CCK field. The problem is getting it back out. I have a node-node_type.tpl.php and ask it $node->content['field_custom_map_data']['#value'] That returns html, three nested div's and uses HTML entities, I want the pure text, as entered. What is the Drupal 5 way to fix this?

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  • Changing the values of a class returned by the array [] operator

    - by devdept
    The question is: at the end of this code the value of ptArray[0].X is 3.33 or 1.11? Thanks. class MyPoint { public double X, Y; public MyPoint(double x, double y) { X = x; Y = y; } } MyPoint[] ptArray = new MyPoint[2]; ptArray[0] = new MyPoint(1.11, 2.22); MyPoint first = ptArray[0]; // Am I changing ptArray[0] here or not? first.X = 3.33; first.Y = 4.44;

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