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  • Lambda recursive PHP functions.

    - by Kendall Hopkins
    Is it possible to have a PHP function that is both recursive and anonymous (lambda). This is my attempt to get it to work, but it doesn't pass in the function name. $factorial = function( $n ) use ( $factorial ) { if( $n == 1 ) return 1; return $factorial( $n - 1 ) * $n; }; print $factorial( 5 ); I'm also aware that this is a bad way to implement factorial, it's just an example.

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  • Does table columns increase select statement execution time

    - by paokg4
    I have 2 tables, same structure, same rows, same data but the first has more columns (fields). For example: I select the same 3 fields from both of them (SELECT a,b,c FROM mytable1 and then SELECT a,b,c FROM mytable2) I've tried to run those queries on 100,000 records (for each table) but at the end I got the same execution time (0.0006 sec) Do you know if the number of the columns (and in the end the size of the one table is bigger than the other) has to do something with the query execution time?

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  • If statement String trouble

    - by Jeremy Stone
    I'm trying to create a program which takes user input of two words and determines whether or not these words are the same. import java.util.Scanner; public class L7E3 { public static void main(String[] args) { Scanner keyboard = new Scanner(System. in ); String word1, word2; System.out.println("Please enter a word: "); word1 = keyboard.nextLine(); System.out.println("Please enter a word: "); word2 = keyboard.nextLine(); if (word1 == word2) { System.out.println("The words are " + word1 + " and " + word2 + ". These words are the same."); } else { System.out.println("The words are " + word1 + " and " + word2 + ". These words are not the same."); } } } I figured that word1==word2 would have worked to determine whether the two strings were equal, I'm using JGrasp and it goes directly to my else option regardless of input. Am I doing something wrong with strings?

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  • Identifying the parts of this typedef struct in C?

    - by Tommy
    Please help me identify the parts of this typdef struct and what each part does and how it can be used: typedef struct my_struct { int a; int b; int c; } struct_int, *p_s; struct_int struct_array[5]; my_struct is the...? struct_int is the...? *p_s is the...and can be used to point to what? struct_array is the...? Also, when creating the array of structs, why do we use struct_int instead of my_struct ? Thank You!

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  • What is @namespace field in C# class?

    - by MainMa
    Hi, I'm browsing the source code of StyleCop, and I found a curious thing: /// <summary> /// The namespace that the rule is contained within. /// </summary> private string @namespace; // [...] internal Rule(string name, string @namespace, string checkId, string context, bool warning) : this(name, @namespace, checkId, context, warning, string.Empty, null, true, false) { Param.Ignore(name, @namespace, checkId, context, warning); } What is this thing? Is it just a simple field where at-sign is used to indicate that it is a field, and not a namespace keyword? If so, may at-sign be used for any reserved word (for example @dynamic, @using, etc.)?

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  • How to dynamically write the query in SQL Server 2008?

    - by user1237131
    How to write the dynamically the below query? Table empid designation interestes 1 developer,tester cricket,chess 1 developer chess 1 techlead cricket Condition: IF empid = 1 AND (designation LIKE '%developer%' OR designationLIKE '%techlead%') OR (interests LIKE '%cricket%'). How to write the above query dynamically if designations need to send more than 2,and also same on interstes . please tell me ... EDIT stored procedure code: ALTER PROCEDURE [dbo].[usp_GetDevices] @id INT, @designation NVARCHAR (MAX) AS BEGIN declare @idsplat varchar(MAX) set @idsplat = @UserIds create table #u1 (id1 varchar(MAX)) set @idsplat = 'insert #u1 select ' + replace(@idsplat, ',', ' union select ') exec(@idsplat) Select id FROM dbo.DevicesList WHERE id=@id AND designation IN (select id1 from #u1) END

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  • Dynamically Insert Variables into DB Table using PreparedStatement

    - by gran_profaci
    I was working with PreparedStatement today and noticed that it used setString() setTimestamp() etc. to insert variables into the DB. I basically have 20 tables each with at least 15 columns and it would not be feasible for me to manuallt write down all the setters. Considering that I have an ArrayList "Vals" which contains all the variables to be inputted in String format (obtained by getString() using PreparedStatement itself), is there any way I can do an insert without using expressly using the Setters? That would save me a lot of time.

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  • iPhone - Using sql database - insert statement failing

    - by Satyam svv
    Hi, I'm using sqlite database in my iphone app. I've a table which has 3 integer columns. I'm using following code to write to that database table. -(BOOL)insertTestResult { NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString* documentsDirectory = [paths objectAtIndex:0]; NSString* dataBasePath = [documentsDirectory stringByAppendingPathComponent:@"test21.sqlite3"]; BOOL success = NO; sqlite3* database = 0; if(sqlite3_open([dataBasePath UTF8String], &database) == SQLITE_OK) { BOOL res = (insertResultStatement == nil) ? createStatement(insertResult, &insertResultStatement, database) : YES; if(res) { int i = 1; sqlite3_bind_int(insertResultStatement, 0, i); sqlite3_bind_int(insertResultStatement, 1, i); sqlite3_bind_int(insertResultStatement, 2, i); int err = sqlite3_step(insertResultStatement); if(SQLITE_ERROR == err) { NSAssert1(0, @"Error while inserting Result. '%s'", sqlite3_errmsg(database)); success = NO; } else { success = YES; } sqlite3_finalize(insertResultStatement); insertResultStatement = nil; } } sqlite3_close(database); return success;} The command sqlite3_step is always giving err as 19. I'm not able to understand where's the issue. Tables are created using following queries: CREATE TABLE [Patient] (PID integer NOT NULL PRIMARY KEY AUTOINCREMENT UNIQUE,PFirstName text NOT NULL,PLastName text,PSex text NOT NULL,PDOB text NOT NULL,PEducation text NOT NULL,PHandedness text,PType text) CREATE TABLE PatientResult(PID INTEGER,PFreeScore INTEGER NOT NULL,PForcedScore INTEGER NOT NULL,FOREIGN KEY (PID) REFERENCES Patient(PID)) I've only one entry in Patient table with PID = 1 BOOL createStatement(const char* query, sqlite3_stmt** stmt, sqlite3* database){ BOOL res = (sqlite3_prepare_v2(database, query, -1, stmt, NULL) == SQLITE_OK); if(!res) NSLog( @"Error while creating %s => '%s'", query, sqlite3_errmsg(database)); return res;}

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  • jQuery toggle on a PHP foreach statement

    - by user313835
    The code for the page is the following <?php foreach ($organization->index() as $id=>$content) { ?> <a href="#" id="obtain_branch"><?= $content->name?></a> <div id="directory_brnach"><?= $content->about?></div> <?php } ?> The JavaScript code using jQuery is // Directory inner branches $('#obtain_branch').click(function(){ $('#directory_brnach').toggle('fast'); }); The problem it will only work on the first one given the the ID is not changing, the rest will not change. How can I send an array to the jQuery function to give an individual ID on every iteration? Thanks in advance.

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  • PreparedStatement and setTimestamp in oracle jdbc

    - by Roman
    Hi everyone, I am using PreparedStatement with Timestamp in where clause: PreparedStatement s=c.prepareStatement("select utctimestamp from t where utctimestamp>=? and utctimestamp<?"); s.setTimestamp(1, new Timestamp(1273017600000L)); //2010-05-05 00:00 GMT s.setTimestamp(2, new Timestamp(1273104000000L)); //2010-05-06 00:00 GMT The result I get is different, when I have different time zones on the client computer. Is this a bug in Oracle jdbc? or correct behavior? The parameter is Timestamp, and I expected that no time conversions will be done on the way. The database column type is DATE, but I also checked it with TIMESTAMP column type with the same results. Is there a way to achieve correct result? I cannot change default timezone in the the whole application to UTC. Thanks for your help

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  • Strange PHP syntax

    - by Joseph
    I've been working on php for some time but today when I saw this it came as new to me: if(preg_match('/foo.*bar/','foo is a bar')): echo 'success '; echo 'foo comes before bar'; endif; To my surprise it also runs without error. Can anyone enlighten me?

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  • SQL Server Subquery returned more than 1 value. This is not permitted when the subquery follows =, !

    - by anilkumarn
    Once i run this query, getting the following error. please help. select OrderDetails.Sku,orderdetails.mf_item_number,orderdetails.Qty,orderdetails.Price,Supplier.SupplierId, Supplier.SupplierName,Supplier.DropShipFees, cost = (Select Supplier_Item.Price from Supplier_Item,orderdetails,Supplier where Supplier_Item.SKU=OrderDetails.Sku and Supplier_Item.SupplierId=Supplier.SupplierID ) from orderdetails,Supplier,Group_Master where invoiceid='339740' and OrderDetails.Mfr_ID = Supplier.SupplierId and Group_Master.Sku = OrderDetails.Sku Msg 512, Level 16, State 1, Line 2 Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , , = or when the subquery is used as an expression.

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  • Need help fetching an array using prepared statments

    - by eldan221
    I have wrote the following code to fetch a string. But for some reason its only returning 1. I have doubled checked everything and it seems like its correct. I am not sure why its only returning 1? Any help here would be really appreciated! //Class Defined here function MenuCat($id){ $query = "SELECT menu_category_description FROM menu_categories WHERE id = ?"; $stmt = $this->db->prepare($query); $stmt->bind_param("i", $id); $stmt->execute(); $stmt->bind_result($menu_category_description); $row = $stmt->fetch(); return $row; } $display_category = $cat_des->MenuCat($id); echo $display_category

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  • Why does my SQL database not work in Android?

    - by user1426967
    In my app a click on an image button brings you to the gallery. After clicking on an image I want to call onActivityResult to store the image path. But it does not work. In my LogCat it always tells me that it crashes when it tries to save the image path. Can you find the problem? My onActivityResult method: mImageRowId = savedInstanceState != null ? savedInstanceState.getLong(ImageAdapter.KEY_ROWID) : null; @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { if(requestCode == PICK_FROM_FILE && data != null && data.getData() != null) { Uri uri = data.getData(); if(uri != null) { Cursor cursor = getContentResolver().query(uri, new String[] { android.provider.MediaStore.Images.ImageColumns.DATA}, null, null, null); cursor.moveToFirst(); String image = cursor.getString(0); cursor.close(); if(image != null) { // HERE IS WHERE I WANT TO SAVE THE IMAGE. HERE MUST BE THE ERROR! if (mImageRowId == null) { long id = mImageHelper.createImage(image); if (id > 0) { mImageRowId = id; } } // Set the image and display it in the edit activity Bitmap bitmap = BitmapFactory.decodeFile(image); mImageButton.setImageBitmap(bitmap); } } } } This is my onSaveInstanceState method: private static final Long DEF_ROW_ID = 0L; @Override protected void onSaveInstanceState(Bundle outState) { outState.putLong(ImageAdapter.KEY_ROWID, mImageRowId != null ? mImageRowId : DEF_ROW_ID); super.onSaveInstanceState(outState); } This is a part from my DbAdapter: public long createImage(String image) { ContentValues cv = new ContentValues(); cv.put(KEY_IMAGE, image); return mImageDb.insert(DATABASE_TABLE, null, cv); }

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  • errorerror C2059: syntax error : ']', i cant figure out why this coming up in c++

    - by user320950
    void display_totals(); int exam1[100][3];// array that can hold 100 numbers for 1st column int exam2[100][3];// array that can hold 100 numbers for 2nd column int exam3[100][3];// array that can hold 100 numbers for 3rd column int main() { int go,go2,go3; go=read_file_in_array; go2= calculate_total(exam1[],exam2[],exam3[]); go3=display_totals; cout << go,go2,go3; return 0; } void display_totals() { int grade_total; grade_total=calculate_total(exam1[],exam2[],exam3[]); } int calculate_total(int exam1[],int exam2[],int exam3[]) { int calc_tot,above90=0, above80=0, above70=0, above60=0,i,j; calc_tot=read_file_in_array(exam[100][3]); exam1[][]=exam[100][3]; exam2[][]=exam[100][3]; exam3[][]=exam[100][3]; for(i=0;i<100;i++); { if(exam1[i] <=90 && exam1[i] >=100) { above90++; cout << above90; } } return exam1[i],exam2[i],exam3[i]; } int read_file_in_array(int exam[100][3]) { ifstream infile; int num, i=0,j=0; infile.open("grades.txt");// file containing numbers in 3 columns if(infile.fail()) // checks to see if file opended { cout << "error" << endl; } while(!infile.eof()) // reads file to end of line { for(i=0;i<100;i++); // array numbers less than 100 { for(j=0;j<3;j++); // while reading get 1st array or element infile >> exam[i][j]; cout << exam[i][j] << endl; } } infile.close(); return exam[i][j]; }

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  • Simple question about C# if else statement

    - by ilkdrl
    Iam doing a simple website and when i press button, i should see weight in label.. i see but if text.maxlenght 6, i should see ERROR message in same label but repeat see weight in label. How can i solve this problem? protected void Button1_Click(object sender, EventArgs e) { double sayi1, sayi2, sayi3, hesap, sonuc; sayi1 = Convert.ToDouble(Tb1.Text); sayi2 = Convert.ToDouble(Tb2.Text); sayi3 = Convert.ToDouble(Tb3.Text); if (Tb1.MaxLength > 6 || Tb2.MaxLength > 6) { lbl1.Text = "ERROR."; } else { hesap = (((sayi1 - ((sayi1 - sayi2) / 2)) * ((sayi1 - sayi2) / 2)) / 40); sonuc = (hesap * sayi3) / 100; lbl1.Text = sonuc.ToString() + "kg"; } }

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  • Excel VBA: Error Handling with Case Statement

    - by AME
    I am trying to validate a file that is uploaded by the user using the code below. The error handler checks the top row of the uploaded file for three specific column names. If one or more of the column names is not present, the program should return a prompt to the user notifying them which column(s) are missing from the file that they uploaded and then close the file. There are a couple issues with my current VBA code that I am seeking help with: The prompt doesn't specify which column(s) are missing to the user. The error handler is triggered even when all required columns are present in the uploaded file. Code: Sub getworkbook() ' Get workbook... Dim ws As Worksheet Dim filter As String Dim targetWorkbook As Workbook, wb As Workbook Dim Ret As Variant Set targetWorkbook = Application.ActiveWorkbook ' get the customer workbook filter = ".xlsx,.xls" caption = "Please select an input file " Ret = Application.GetOpenFilename(filter, , caption) If Ret = False Then Exit Sub Set wb = Workbooks.Open(Ret) On Error GoTo ErrorLine: 'Check for columns var1 = ActiveSheet.Range("1:1").Find("variable1", LookIn:=xlValues, LookAt:=xlWhole, MatchCase:=True).Column var2 = ActiveSheet.Range("1:1").Find("variable2", LookIn:=xlValues, LookAt:=xlWhole, MatchCase:=True).Column var3 = ActiveSheet.Range("1:1").Find("variable3", LookIn:=xlValues, LookAt:=xlWhole, MatchCase:=True).Column ErrorLine: MsgBox ("The selected file is missing a key data column, please upload a correctly formated file.") If Error = True Then ActiveWorkSheet.Close wb.Sheets(1).Move Before:=targetWorkbook.Sheets("Worksheet2") ActiveSheet.Name = "DATA" End Sub

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  • What is the fastest way to compare 2 rows in SQL?

    - by Swoosh
    I have 2 different databases. Upon changing something in the big one (i don't have access to), i get some rows imported in my databases in a similar HUGE table. I have a job checking for records in this table, and if any, execute a stored procedure, process and delete from table. Performance. (Huge amount of data) I would like to know what is the fastest way to know if something has changed using let's say 2 imported rows with 100 columns each. Don't have FK-s, don't need. Chances are, that even though I have records in my table, nothing has actually changed. Also. Let's say there is actually changed something. Is it possible for example to check only for changes inside datetime columns? Thanks

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  • In SQL, why is "Distinct" not used in a subquery, when looking for some items "not showing up" in th

    - by Jian Lin
    Usually when looking for some items not showing up in the other table, we can use: select * from gifts where giftID not in (select giftID from sentgifts); or select * from gifts where giftID not in (select distinct giftID from sentgifts); the second line is with "distinct" added, so that the resulting table is smaller, and probably let the search for "not in" faster too. So, won't using "distinct" be desirable? Often than not, I don't see it being used in the subquery in such a case. Is there advantage or disadvantage of using it? thanks.

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  • SQL Server 2008 vs 2005 udf xml perfomance problem.

    - by user344495
    Ok we have a simple udf that takes a XML integer list and returns a table: CREATE FUNCTION [dbo].[udfParseXmlListOfInt] ( @ItemListXml XML (dbo.xsdListOfInteger) ) RETURNS TABLE AS RETURN ( --- parses the XML and returns it as an int table --- SELECT ListItems.ID.value('.','INT') AS KeyValue FROM @ItemListXml.nodes('//list/item') AS ListItems(ID) ) In a stored procedure we create a temp table using this UDF INSERT INTO @JobTable (JobNumber, JobSchedID, JobBatID, StoreID, CustID, CustDivID, BatchStartDate, BatchEndDate, UnavailableFrom) SELECT JOB.JobNumber, JOB.JobSchedID, ISNULL(JOB.JobBatID,0), STO.StoreID, STO.CustID, ISNULL(STO.CustDivID,0), AVL.StartDate, AVL.EndDate, ISNULL(AVL.StartDate, DATEADD(day, -8, GETDATE())) FROM dbo.udfParseXmlListOfInt(@JobNumberList) TMP INNER JOIN dbo.JobSchedule JOB ON (JOB.JobNumber = TMP.KeyValue) INNER JOIN dbo.Store STO ON (STO.StoreID = JOB.StoreID) INNER JOIN dbo.JobSchedEvent EVT ON (EVT.JobSchedID = JOB.JobSchedID AND EVT.IsPrimary = 1) LEFT OUTER JOIN dbo.Availability AVL ON (AVL.AvailTypID = 5 AND AVL.RowID = JOB.JobBatID) ORDER BY JOB.JobSchedID; For a simple list of 10 JobNumbers in SQL2005 this returns in less than 1 second, in 2008 this run against the exact same data returns in 7 min. This is on a much faster machine with more memory. Any ideas?

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