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  • Large Switch statements: Bad OOP?

    - by Mystere Man
    I've always been of the opinion that large switch statements are a symptom of bad OOP design. In the past, I've read articles that discuss this topic and they have provided altnerative OOP based approaches, typically based on polymorphism to instantiate the right object to handle the case. I'm now in a situation that has a monsterous switch statement based on a stream of data from a TCP socket in which the protocol consists of basically newline terminated command, followed by lines of data, followed by an end marker. The command can be one of 100 different commands, so I'd like to find a way to reduce this monster switch statement to something more manageable. I've done some googling to find the solutions I recall, but sadly, Google has become a wasteland of irrelevant results for many kinds of queries these days. Are there any patterns for this sort of problem? Any suggestions on possible implementations? One thought I had was to use a dictionary lookup, matching the command text to the object type to instantiate. This has the nice advantage of merely creating a new object and inserting a new command/type in the table for any new commands. However, this also has the problem of type explosion. I now need 100 new classes, plus I have to find a way to interface them cleanly to the data model. Is the "one true switch statement" really the way to go? I'd appreciate your thoughts, opinions, or comments.

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  • jQuery multiple if else Statements

    - by Chris MMgr
    I have a set of images that I am trying to activate (change opacity) based on the position of a user's window. The below code works, but only through a long series of if else statements. Is there a way to shorten the below code? //Function to activate and deactivate the buttons on the side menu function navIndicator() { var winNow = $(window).scrollTop(); var posRoi = $('#roi').offset(); var posRoiNow = posRoi.top; //Activate the propper button corresponding to what section the user is viewing if (winNow == posRoiNow * 0) { $('#homeBut a img.active').stop().animate({ opacity: 1 } { queue: false, duration: 300, easing: "easeOutExpo" }); $('#homeBut').addClass("viewing") } else { $('#homeBut a img.active').stop().animate({ opacity: 0 }, { queue: false, duration: 300, easing: "easeOutExpo" }); $('#homeBut').removeClass("viewing") } if (winNow == posRoiNow) { $('#roiBut a img.active').stop().animate({ opacity: 1 }, { queue: false, duration: 300, easing: "easeOutExpo" }); $('#roiBut').addClass("viewing") } else { $('#roiBut a img.active').stop().animate({ opacity: 0 }, { queue: false, duration: 300, easing: "easeOutExpo" }); $('#roiBut').removeClass("viewing") } if (winNow == posRoiNow * 2) { $('#dmsBut a img.active').stop().animate({ opacity: 1 }, { queue: false, duration: 300, easing: "easeOutExpo" }); $('#dmsBut').addClass("viewing") } else { $('#dmsBut a img.active').stop().animate({ opacity: 0 }, { queue: false, duration: 300, easing: "easeOutExpo" }); $('#dmsBut').removeClass("viewing") } if (winNow == posRoiNow * 3) { $('#techBut a img.active').stop().animate({ opacity: 1 }, { queue: false, duration: 300, easing: "easeOutExpo" }); $('#techBut').addClass("viewing") } else { $('#techBut a img.active').stop().animate({ opacity: 0 }, { queue: false, duration: 300, easing: "easeOutExpo" }); $('#techBut').removeClass("viewing") } if (winNow == posRoiNow * 4) { $('#impBut a img.active').stop().animate({ opacity: 1 }, { queue: false, duration: 300, easing: "easeOutExpo" }); $('#impBut').addClass("viewing") } else { $('#impBut a img.active').stop().animate({ opacity: 0 }, { queue: false, duration: 300, easing: "easeOutExpo" }); $('#impBut').removeClass("viewing") } if (winNow == posRoiNow * 5) { $('#virBut a img.active').stop().animate({ opacity: 1 }, { queue: false, duration: 300, easing: "easeOutExpo" }); $('#virBut').addClass("viewing") } else { $('#virBut a img.active').stop().animate({ opacity: 0 }, { queue: false, duration: 300, easing: "easeOutExpo" }); $('#virBut').removeClass("viewing") } if (winNow == posRoiNow * 6) { $('#biBut a img.active').stop().animate({ opacity: 1 }, { queue: false, duration: 300, easing: "easeOutExpo" }); $('#biBut').addClass("viewing") } else { $('#biBut a img.active').stop().animate({ opacity: 0 }, { queue: false, duration: 300, easing: "easeOutExpo" }); $('#biBut').removeClass("viewing") } if (winNow == posRoiNow * 7) { $('#contBut a img.active').stop().animate({ opacity: 1 }, { queue: false, duration: 300, easing: "easeOutExpo" }); $('#contBut').addClass("viewing") } else { $('#contBut a img.active').stop().animate({ opacity: 0 }, { queue: false, duration: 300, easing: "easeOutExpo" }); $('#contBut').removeClass("viewing") } };

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  • Add a fadein fade out in jQuery, on multiple conditional statements

    - by Matthew Harwood
    Task: On click of li navigation filter show and hide content with a transitional fadein fade out. Problem I'm just guessing and checking on where to place this fadein//fadeout transition. Furthermore, I feel like my code is too inefficiency because I'm using 4 conditional statements. Would stack lead me in creating a solution to improve the overall logic of this script so I can just make a pretty transition :c? LIVE CODE jQuery Script $(document).ready(function () { //attach a single click listener on li elements $('li.navCenter').on('click', function () { // get the id of the clicked li var id = $(this).attr('id'); // match current id with string check then apply filter if (id == 'printInteract') { //reset all the boxes for muliple clicks $(".box").find('.video, .print, .web').closest('.box').show(); $(".box").find('.web, .video').closest('.box').hide(); $(".box").find('.print').show(); } if (id == 'webInteract') { $(".box").find('.video, .print, .web').closest('.box').show(); $(".box").find('.print, .video').closest('.box').hide(); $(".box").find('.web').show(); } if (id == 'videoInteract') { $(".box").find('.video, .print, .web').closest('.box').show(); $(".box").find('.print, .web').closest('.box').hide() $(".box").find('.video').show(); } if (id == 'allInteract') { $(".box").find('.video, .print, .web').closest('.box').show(); } }); HTML Selected <nav> <ul class="navSpaces"> <li id="allInteract" class="navCenter"> <a id="activeAll" class="navBg" href="#"><div class="relativeCenter"><img src="asset/img/logo30px.png" /><h3>all</h3></div></a> </li> <li id="printInteract" class="navCenter"> <a id="activePrint" class="navBg" href="#"><div class="relativeCenter"><img src="asset/img/print.gif" /><h3>print</h3></div></a> </li> <li id="videoInteract" class="navCenter"> <a id="activeVideo" class="navBg" href="#"><div class="relativeCenter"><img src="asset/img/video.gif" /><h3>video</h3></div></a> </li> <li id="webInteract" class="navCenter"> <a id="activeWeb" class="navBg" href="#"><div class="relativeCenter"><img src="asset/img/web.gif" /><h3>web</h3></div></a> </li> </ul> ps. Sorry for the newbie question

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  • Using IF statements to find string length in array for alignment (Visual Basic)

    - by Brodoin
    My question is just as it says in the title. How would one use IF statements to find the string-length of content in an array, and then make it so that they show up in a Rich Text Box with the left sides aligned? Noting that one value in my array is a Decimal. Imports System.IO Imports System.Convert Public Class frmAll 'Declare Streamreader Private objReader As StreamReader 'Declare arrays to hold the information Private strNumber(24) As String Private strName(24) As String Private strSize(24) As String Private decCost(24) As Integer Private Sub frmAll_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load 'Set objReader objReader = New StreamReader("products.csv") 'Call the FillArray sub to fill the array Call FillArray() End Sub Private Sub FillArray() 'Declare variables and arrays Dim decCost(24, 1) As Decimal Dim strFields() As String Dim strRec As String Dim intCount As Integer = 0 Dim chrdelim As Char = ToChar(",") 'Set strRec to read the lines strRec = objReader.ReadLine 'Do while loop to fill array. Do While strRec <> Nothing strFields = strRec.Split(chrdelim) strNumber(intCount) = strFields(0) strName(intCount) = strFields(1) strSize(intCount) = strFields(2) decCost(intCount, 0) = ToDecimal(strFields(3)) decCost(intCount, 1) = ToDecimal(strFields(4)) 'Set strRec to read the lines again strRec = objReader.ReadLine 'increment the index intCount += 1 Loop 'Call the Calculate sub for calculation Call Calculate(decCost) End Sub Private Sub Calculate(ByVal numIn(,) As Decimal) 'Define arrays to hold total cost Dim decRowTotal(24) As Decimal 'Define variables to hold the counters for rows and columns Dim intR As Integer Dim intC As Integer 'Calcualte total cost For intC = 0 To 1 For intR = 0 To 24 decRowTotal(intR) += numIn(intR, intC) * 1 Next Next 'Call the Output sub to configure the output. Call Output(numIn, decRowTotal) End Sub Private Sub Output(ByVal NumIn(,) As Decimal, _ ByVal RowTotalIn() As Decimal) 'Variables Dim strOut As String Dim intR As Integer = 0 Dim intC As Integer = 0 'Set header for output. strOut = "ID" & vbTab & "Item" & vbTab & vbTab & vbTab & "Size" & _ vbTab & vbTab & vbTab & vbTab & "Total Price" & _ vbCrLf & "---------- ... -------------------------" & vbCrLf 'For loop to add each line to strOut, setting 'the RowTotalIn to currency. For intC = 0 To 24 strOut &= strNumber(intC) & vbTab strOut &= strName(intC) & vbTab strOut &= strSize(intC) & vbTab strOut &= RowTotalIn(intC).ToString("c") & vbCrLf Next 'Add strOut to rbtAll rtbAll.Text = strOut End Sub End Class Output It shows up with vbTabs in my output, but still, it looks similar in that they are not aligned. The first two do, but after that they are not, and I am totally lost. P0001 Coffee - Colombian Supreme 24/Case: Pre-Ground 1.75 Oz Bags $16.50 P0002 Coffee - Hazelnut 24/Case: Pre-Ground 1.75 Oz Bags $24.00 P0003 Coffee - Mild Blend 24/Case: Pre-Ground 1.75 Oz Bags $20.50 P0004 Coffee - Assorted Flavors 18/Case. Pre-Ground 1.75 Oz Bags $23.50 P0005 Coffee - Decaf 24/Case: Pre-Ground 1.75 Oz Bags $20.50

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  • C# LINQ filtering with nested if statements

    - by Tim Sumrall
    I have a learning project where a data grid is filtered by 3 controls (a checkbox and 2 dropdowns) I'm about to wrap up and move on to another project as it works well but I don't like the complexity of nesting IF statements to capture all the possible combinations of the 3 filters and was wondering if there is a better way. For example: Something that would allow for more filters to be added easily rather than walking through all the nests and adding another level of madness. private void BuildQuery() { EntityQuery<MASTER_DOCKS> query = QDocksContext.GetMASTER_DOCKSQuery(); if (Tonnage.IsChecked.HasValue && Tonnage.IsChecked.Value) { if (null != FilterWaterWay.SelectedValue) { string WaterwaytoFilterBy = FilterWaterWay.SelectedValue.ToString(); if (!string.IsNullOrWhiteSpace(WaterwaytoFilterBy) && WaterwaytoFilterBy != "[Select WaterWay]") { if (null != FilterState.SelectedValue) { string StateToFilterBy = FilterState.SelectedValue.ToString(); if (null != FilterState.SelectedValue && !string.IsNullOrWhiteSpace(StateToFilterBy) && StateToFilterBy != "[Select State]") { if (!string.IsNullOrWhiteSpace(StateToFilterBy) && StateToFilterBy != "[Select State]") { query = query.Where(s => s.WTWY_NAME == WaterwaytoFilterBy && s.STATE == StateToFilterBy && (s.Tons != "0" && s.Tons != "")).OrderBy(s => s.WTWY_NAME); MyQuery.Text = "Tonnage, WW and State"; } } if (StateToFilterBy == "[Select State]") //waterway but no state { query = query.Where(s => s.WTWY_NAME == WaterwaytoFilterBy && (s.Tons != "0" && s.Tons != "")).OrderBy(s => s.WTWY_NAME); MyQuery.Text = "Tonnage, WW No State"; } } } else { if (null != FilterState.SelectedValue) { string StateToFilterBy = FilterState.SelectedValue.ToString(); if (null != FilterState.SelectedValue && !string.IsNullOrWhiteSpace(StateToFilterBy) && StateToFilterBy != "[Select State]") { if (!string.IsNullOrWhiteSpace(StateToFilterBy) && StateToFilterBy != "[Select State]") { query = query.Where(s => s.STATE == StateToFilterBy && (s.Tons != "0" && s.Tons != "")).OrderBy(s => s.WTWY_NAME); MyQuery.Text = "Tonnage State No WW"; } } else { query = query.Where(s => (s.Tons != "0" && s.Tons != "")); MyQuery.Text = "Tonnage No State No WW"; } } } } } else //no tonnage { if (null != FilterWaterWay.SelectedValue) { string WaterwaytoFilterBy = FilterWaterWay.SelectedValue.ToString(); if (!string.IsNullOrWhiteSpace(WaterwaytoFilterBy) && WaterwaytoFilterBy != "[Select WaterWay]") { if (null != FilterState.SelectedValue) { string StateToFilterBy = FilterState.SelectedValue.ToString(); if (null != FilterState.SelectedValue && !string.IsNullOrWhiteSpace(StateToFilterBy) && StateToFilterBy != "[Select State]") { if (!string.IsNullOrWhiteSpace(StateToFilterBy) && StateToFilterBy != "[Select State]") { query = query.Where(s => s.WTWY_NAME == WaterwaytoFilterBy && s.STATE == StateToFilterBy).OrderBy(s => s.WTWY_NAME); MyQuery.Text = "No Tonnage, WW and State"; } } if (StateToFilterBy == "[Select State]") //waterway but no state { query = query.Where(s => s.WTWY_NAME == WaterwaytoFilterBy).OrderBy(s => s.WTWY_NAME); MyQuery.Text = "No Tonnage, WW No State"; } } } else { if (null != FilterState.SelectedValue) { string StateToFilterBy = FilterState.SelectedValue.ToString(); if (null != FilterState.SelectedValue && !string.IsNullOrWhiteSpace(StateToFilterBy) && StateToFilterBy != "[Select State]") { if (!string.IsNullOrWhiteSpace(StateToFilterBy) && StateToFilterBy != "[Select State]") { query = query.Where(s => s.STATE == StateToFilterBy).OrderBy(s => s.WTWY_NAME); MyQuery.Text = "No Tonnage State No WW"; } } else { LoadAllData(); MyQuery.Text = "No Tonnage No State No WW"; } } } } } LoadOperation<MASTER_DOCKS> loadOp = this.QDocksContext.Load(query); DocksGrid.ItemsSource = loadOp.Entities; }

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  • Return cell reference as result of if statement with vlookups.

    - by EMJ
    I have two sets of data in excel. One contains a set of data which represents the initial step of a process. The other set of data represents the additional steps which take place after the first step is completed. Each of the data records in the "additional step data" has an id in a column. I need to find the identifying codes of the "additional step data" which correspond with the initial step data records. The problem is that I have to match the data in 4 columns between the two data sets and return the id of the "additional step data". I started by doing a combination of an if and vlookup functions, but I got stuck when I tried to figure out how to get the if statement to reference the id of the matching "additional step data". Basically I am trying to avoid having to search by manually filtering between two sets of data and finding corresponding records. Does anyone have any idea about how to do this?

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  • Python 2.4 inline if statements

    - by Marcus Whybrow
    I am setting up an existing django project on a dreamhost web server, so far I have got everything to work correctly. However I developed under python 2.5 and dreamhost by default uses python 2.4. The following line seems gives a syntax error because of the if keyword: 'parent': c.parent.pk if c.parent is not None else None ^ Is it the case that this form of if statement was introduced in Python 2.5, if so is there an easy change that would make it compatible with Python 2.4? Or, should I just change to Python 2.5. I have already installed python 2.5 to a directory under my home directory, and have succeeded in running the python interpreter under 2.5. If I wish to use Python 2.5 for everything, where can I set this?

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  • Multiple JOIN and SELECT Statements from eight tables

    - by user1486004
    I am trying to make an SQL statement that takes eight different numbers and searches eight different tables from one database for the corresponding value. I keep getting invalid syntax, but I can't figure out why. Here is my code: SELECT cable_length.ID, drawing.ID, optional.ID, output_type.ID, pressure_range.ID, pressure_type.ID, series.ID, termination.ID FROM ( SELECT value AS cable_length FROM A1 WHERE A1.id = %s JOIN SELECT value AS drawing FROM A2 WHERE A2.id = %s, JOIN SELECT value AS optional FROM A3 WHERE A3.id = %s, JOIN SELECT value AS output_type FROM A4 WHERE A4.id = %s, JOIN SELECT value AS pressure_range FROM A5 WHERE A5.id = %s, JOIN SELECT value AS pressure_type FROM A6 WHERE A6.id = %s, JOIN SELECT value AS series FROM A7 WHERE A7.id = %s, JOIN SELECT value AS termination FROM A8 WHERE A8.id = %s ); The %s will be changed to numbers only. The column name in each database is "ID" and "Value". I want to search by "ID" and return "Value". Any help is greatly appreciated.

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  • what's wrong with sql statements sqlite3_column_text ??

    - by ahmet732
    if(sqlite3_open([databasePath UTF8String], & database) == SQLITE_OK) { NSLog(@"DB OPENED"); // Setup the SQL Statement and compile it for faster access const char *sqlStatement ="select name from Medicine"; sqlite3_stmt *compiledStatement; int result = sqlite3_prepare_v2(database, sqlStatement, -1, &compiledStatement, nil); NSLog(@"RESULT %d", result); if(result == SQLITE_OK) { NSLog(@"RESULT IS OK..."); // Loop through the results and add them to the feeds array while(sqlite3_step(compiledStatement) == SQLITE_ROW) { // Read the data from the result row NSLog(@"WHILE IS OK"); **araci = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 1)];** NSLog(@"Data read"); NSLog(@"wow: %",araci); }//while }//if sqlite_prepare v2 // Release the compiled statement from memory sqlite3_finalize(compiledStatement); NSLog(@"compiled stmnt finalized.."); } sqlite3_close(database); NSLog(@"MA_DB CLOSED"); Questions 1 ) Everything is alright until bold code. when i run the app, throws an exception below. I have one table and one row in my db relatively, id (integer), name (varchar), desc (varchar) (I created my table using SQLite Manager). 2-) What is text type in SQLite Manager? Is that NSString? Also how can I put the string values(in table) to an NSMutableArray ? (I am really having difficulty in conversion.) *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** +[NSString stringWithUTF8String:]: NULL cString'

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  • Evaluation of Haskell Statements/Expressions using GHC API

    - by Cetin Sert
    For a tool I'm writing ( http://hackage.haskell.org/package/explore ) I need a way to read haskell function definitions at run-time, apply them to values from my tool and retrieve the results of their application. Can anyone give me a very basic example using GHC (6.10.4 or 6.12.1) API? example function definition to be read from a file at run-time: f x = 10**(((4/1102)*x)-1) expected program output --mapM_ print $ map f [428, 410, 389] 3.577165388142748 3.077536885227335 2.5821307011665815

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  • Case statements in VHDL

    - by cheryl
    Hi, When programming in VHDL, can you use a variable in a case statement? This variable will modified by one of the cases i.e. case task is when 1 => when 2 => when number => is this OK?

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  • SQL Server: Profiling statements inside a User-Defined Function

    - by Craig Walker
    I'm trying to use SQL Server Profiler (2005) to track down some application performance problems. One of the calls being made is to a table-valued user-defined function. This function wraps a select that joins several tables together. In SQL Server Profiler, the call to the UDF is logged. However, the select that underlies the UDF isn't being logged at all. Because of this, I'm not getting useful data on which tables & indexes are being hit. I'd like to feed this info into the Database Tuning Advisor for some indexing advice. Is there any way (short of unwrapping the queries themselves) to log the tables called by UDFs in Profiler?

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  • pdb show different variable values than print statements

    - by martin
    Hi, everyone. I am debugging a python module with homemade c extensions. The output seems correct when I print it with 'p' in pdb. But if I use a normal print statement or pickle it, the output is wrong. What could be causing pdb to show different values than normal execution? I can even step to the print statement in debug mode, and pdb will show the correct value but the program will print the wrong one. The problem seems to happen only when I have called a certain c extension earlier. Glad to post code if that helps. Thank you.

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  • ODBC: Mapping of literal type names in create table statements

    - by matthias-meyer
    I was wondering if data types in a a literal "create table" statement, executed over ODBC, are replaced with their database specific counterparts (platform is Windows/.Net/C#). I cannot find this feature in the ODBC docs, and there seems to be no list of literal "ODBC data types". However, I know that this works for Oracle, SQL Server and Access; the following statement is executed correctly, although the type LONGVARBINARY is no native type in all of these systems: CREATE TABLE (MYCOLUMN LONGVARBINARY) However, e.g. for Oracle the mapped native type depends on the used ODBC driver. Is this an undocumented feature? Is there a list of supported type names anywhere? Thanks!

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  • Dynamic find methods Vs conditional statements

    - by piemesons
    Student.find(:all, :conditions => [‘name = ? and status = ?’ ‘mohit’, 1]) Vs Student.find_all_by_name_and_status(‘mohit’, 1) Both the queries will result the same set of row but first one is preferable cause in the second way there will be exception generated method_missing and then rails will try to relate it as dynamic method. if fine then result set to returned. Can any body explain me this in a good manner. What exactly is happening behind the screen. Please correct me if i am wrong.

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  • Getting the record ID just added with mysql prepared statements

    - by dmontain
    I'm inserting a record using PDO (very similar to mysqli). $addRecord->execute(); To know if the operation worked, I've learned that I can save it to a variable $result that can be used as true false $result = $addRecord->execute(); if ($result){ //add successful } else { //add unsuccessful } What I'd like to do is also get the record id just added. In the table, each record has an auto_incremented field called id. I tried doing this $new_id = $result['id']; but it seems that $result is purely boolean and doesn't actually hold the actual record that was added. Can someone confirm this and how would I then access the record just added? Note that several people may be adding to the same table at the same time, so I think getting just the last one would not be very accurate.

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  • Questions regarding ordering of catch statements in catch block - compiler specific or language stan

    - by Andy
    I am currently using Visual Studio Express C++ 2008, and have some questions about catch block ordering. Unfortunately, I could not find the answer on the internet so I am posing these questions to the experts. I notice that unless catch (...) is placed at the end of a catch block, the compilation will fail with error C2311. For example, the following would compile: catch (MyException) { } catch (...) { } while the following would not: catch (...) { } catch (MyException) { } a. Could I ask if this is defined in the C++ language standard, or if this is just the Microsoft compiler being strict? b. Do C# and Java have the same rules as well? c. As an aside, I have also tried making a base class and a derived class, and putting the catch statement for the base class before the catch statement for the derived class. This compiled without problems. Are there no language standards guarding against such practice please?

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  • sqlite on iphone can open db but not prepare statements

    - by jan
    I'm brand new to using sqlite so I may have missed something basic. I've created a database and copied it into my app's document's directory. I'm able to open it but when I make a call to sqlite3_prepare_v2 I receive SQLITE_ERROR, "SQL error or missing database". here's my code: sqlite3 *database; if(sqlite3_open([dbPath UTF8String], &database) == SQLITE_OK) { sqlite3_stmt *compiledStatement; NSString *sqlStatement = @"select * from dbname"; int result = sqlite3_prepare_v2(database, [sqlStatement UTF8String], -1, &compiledStatement, nil); ... } the same sql statement works in the terminal. I've found this question in a few places either without answers or with solutions that don't fix my problem. I'm hoping someone here will be able to help. Thanks.

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  • Mysql Error in query statements

    - by Mark Estrada
    Hi All, I am trying to acquaint myself on Mysql syntax. I only have used MSSQL so far. I downloaded the Mysql Query Browser and have installed the Mysql Version 5.1 I wanted to run this line of code in the resultset tab of mysql but I keep on encountering below error You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'declare iCtr int' at line 1 declare iCtr int; set iCtr = 1; while iCtr < 1000 begin insert into employee (emp_id,emp_first_name,emp_last_name,status_id) values (iCtr, 'firstName' + iCtr, 'lastName' + iCtr, 1) set iCtr = iCtr + 1; end I just wanted to populate my employees table but I cannot get past the mysql syntax. Any advise please. Thanks

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  • Static analysis of multiple if statements (conditions)

    - by koppernickus
    I have code similar to: if conditionA(x, y, z) then doA() else if conditionB(x, y, z) then doB() ... else if conditionZ(x, y, z) then doZ() else throw ShouldNeverHappenException I would like to validate two things (using static analysis): If all conditions conditionA, conditionB, ..., conditionZ are mutually exclusive (i.e. it is not possible that two or more conditions are true in the same time). All possible cases are covered, i.e. "else throw" statement will never be called. Could you recommend me a tool and/or a way I could (easily) do this? I would appreciate more detailed informations than "use Prolog" or "use Mathematica"... ;-)

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  • Better way to "find parent" and if statements

    - by Luke Abell
    I can't figure out why this isn't working: $(document).ready(function() { if ($('.checkarea.unchecked').length) { $(this).parent().parent().parent().parent().parent().parent().parent().removeClass('checked').addClass('unchecked'); } else { $(this).parent().parent().parent().parent().parent().parent().parent().removeClass('unchecked').addClass('checked'); } }); Here's a screenshot of the HTML structure: http://cloud.lukeabell.com/JV9N (Updated with correct screenshot) Also, there has to be a better way to find the parent of the item (there are multiple of these elements on the page, so I need it to only effect the one that is unchecked) Here's some other code that is involved that might be important: $('.toggle-open-area').click(function() { if($(this).parent().parent().parent().parent().parent().parent().parent().hasClass('open')) { $(this).parent().parent().parent().parent().parent().parent().parent().removeClass('open').addClass('closed'); } else { $(this).parent().parent().parent().parent().parent().parent().parent().removeClass('closed').addClass('open'); } }); $('.checkarea').click(function() { if($(this).hasClass('unchecked')) { $(this).removeClass('unchecked').addClass('checked'); $(this).parent().parent().parent().parent().parent().parent().parent().removeClass('open').addClass('closed'); } else { $(this).removeClass('checked').addClass('unchecked'); $(this).parent().parent().parent().parent().parent().parent().parent().removeClass('closed').addClass('open'); } }); (Very open to improvements for that section as well) Thank you so much! Here's a link to where this is all happening: http://linkedin.guidemytech.com/sign-up-for-linkedin-step-2-set-up-linkedin-student/ Update: I've improved the code from the comments, but still having issues with that first section not working. $(document).ready(function() { if ($('.checkarea.unchecked').length) { $(this).parents('.whole-step').removeClass('checked').addClass('unchecked'); } else { $(this).parents('.whole-step').removeClass('unchecked').addClass('checked'); } }); -- $('.toggle-open-area').click(function() { if($(this).parent().parent().parent().parent().parent().parent().parent().hasClass('open')) { $(this).parents('.whole-step').removeClass('open').addClass('closed'); } else { $(this).parents('.whole-step').removeClass('closed').addClass('open'); } }); $('.toggle-open-area').click(function() { $(this).toggleClass('unchecked checked'); $(this).closest(selector).toggleClass('open closed'); }); $('.checkarea').click(function() { if($(this).hasClass('unchecked')) { $(this).removeClass('unchecked').addClass('checked'); $(this).parent().parent().parent().parent().parent().parent().parent().removeClass('open').addClass('closed'); } else { $(this).removeClass('checked').addClass('unchecked'); $(this).parent().parent().parent().parent().parent().parent().parent().removeClass('closed').addClass('open'); } });

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  • PDO and SQL IN statements

    - by Sai
    Im using a sequel for search like this using PDOs $states = "'SC','SD'"; $sql = "select * from mytable where states in (:states)"; $params = array(':states'=>$states); and I use my function $result = $this->selectArrayAssoc($sql, $params); where my selectArrayAssoc function as following public function selectArrayAssoc($sql, $params = array()){ try{ $sth = $this->db->prepare($sql); $sth->execute($params); $result = $sth->setFetchMode(PDO::FETCH_ASSOC); return $sth->fetchAll(); }catch(PDOException $e){ print $e->getMessage(); //Log this to a file later when in production exit; } } it does not take the quoted variables, I think it is suppressing, in such cases how to deal with this.

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  • jQuery / javascript and nested if statements

    - by rayne
    I have a multi-lingual page where I want to display form validation error in the user's language. I use a hidden input to determine which language version the user is browsing like this: <input type="hidden" name="lang" id="lang" value="<?php echo $lang; ?>" /> The PHP side of the script works, but jQuery doesn't seem to realize which language is passed on. It displays the English error message no matter on which language site I am. Here's the code (I removed the other form fields for length): $(document).ready(function(){ $('#contact').submit(function() { $(".form_message").hide(); var emailReg = /^([\w-\.]+@([\w-]+\.)+[\w-]{2,4})?$/; var lang = $("#lang").val(); var name = $("#name").val(); var dataString = { 'lang': lang, 'name': name } if (name == '') { if (lang == 'de') { $("#posted").after('<div class="form_message"><p><span class="error">Fehler:</span> Bitte gib deinen Namen an!</p></div>'); } else { $("#posted").after('<div class="form_message"><p><span class="error">Error:</span> Please enter your name!</p></div>'); } $("#name").focus(); $("#name").addClass('req'); } else { $("#loading").show(); $("#loading").fadeIn(400).html('<img src="/img/loading.gif" />Loading...'); $.ajax({ type: "POST", url: "/contact-post.php", data: dataString, cache: false, success: function(html){ $("#loading").hide(); $("#posted").after('<div class="form_message"><p>Thank you! Your contact request has been sent.</p></div>'); $("#contact input:submit").attr("disabled", "disabled").val("Success!"); } }); }return false; }); }); The problem seems to be somewhere in the nested if statement. Does jQuery / javascript even recognize nested ifs? And if yes, why is it not working?

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  • running "./script" gets syntax error after import statements, but "python script" works fine

    - by nzomkxia
    I'm doing something with the sys.argv in python here is the code: age1.py import datetime import os import sys if len(sys.argv) == 2: now_time = datetime.datetime.now() future_time = now_time + datetime.timedelta(int(sys.argv[1])) print "date in", sys.argv[1],"days",future_time elif len(sys.argv) == 4: print "three paras" spe_time = datetime.datetime(int(sys.argv[1]),int(sys.argv[2]),int(sys.argv[3])) now_time = datetime.datetime.now() diff_time = now_time - spe_time print "days since then..." , diff_time if I run the code in bash like: python age1.py xxxx, the program goes fine but if I run that like ./age1.py xxxx, the mouse will become a symbol like "+", then the program ends up with: "./age1.py: line 5: syntax error near unexpected token `sys.argv' ./age1.py: line 5: `if len(sys.argv) == 2:' system: Ubuntu 10.10 Python 2.7.3 any reason for that?

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