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  • What's the difference between /123 and /?123?

    - by BoltClock
    I've noticed that some sites (including http://jobs.stackoverflow.com) have query strings that look like this: http://somewebapp.example/?123 as compared to: http://somewebapp.example/123 or http://somewebapp.example/id/123 What are the reasons that developers choose to implement their web apps' URLs using the first example instead of the second and third examples? And as a bonus, how would one implement the first example in PHP, given that 123 is the primary key of some row in a database table? (I just need to know how to retrieve 123 from the URL; I already know how to query the database for a primary key of 123.)

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  • NullReferenceExeption when reading from a file

    - by Whitey
    I need to read a file structured like this: 01000 00030 00500 03000 00020 And put it in an array like this: int[,] iMap = new int[iMapHeight, iMapWidth] { {0, 1, 0, 0, 0}, {0, 0, 0, 3, 0}, {0, 0, 5, 0, 0}, {0, 3, 0, 0, 0}, {0, 0, 0, 2, 0}, }; Hopefully you see what I'm trying to do here. I was confused how to do this so I asked here on SO, but the code I got from it gets this error: Object reference not set to an instance of an object. I'm pretty new to this so I have no idea how to fix it... I only barely know the code: protected void ReadMap(string mapPath) { using (var reader = new StreamReader(mapPath)) { for (int i = 0; i < iMapHeight; i++) { string line = reader.ReadLine(); for (int j = 0; j < iMapWidth; j++) { iMap[i, j] = (int)(line[j] - '0'); } } } } The line I get the error on is this: iMap[i, j] = (int)(line[j] - '0'); Can anyone provide a solution? Thank you. :)

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  • Void* array casting to float, int32, int16, etc.

    - by Griffin
    Hey guys, I've got an array of PCM data, it could be 16 bit, 24 bit packed, 32 bit, etc.. It could be signed, or unsigned, and it could be 32 or 64 bit floating point. It is currently stored as a "void**" matrix, indexed by channel, then by frame. The goal is to allow my library to take in any PCM format and buffer it, without requiring manipulation of the data to fit a designated structure. If the A/D converter spits out 24 bit packed arrays of interleaved PCM, I need to accept it gracefully. I also need to support 16 bit non interleaved, as well as any permutation of the above formats. I know the bit depth and other information at runtime, and I'm trying to code efficiently while not duplicating code. What I need is an effective way to cast the matrix, put PCM data into the matrix, and then pull it out later. I can cast the matrix to int32_t, or int16_t for the 32 and 16 bit signed PCM respectively, I'll probably have to store the 24 bit PCM in an int32_t for 32 bit, 8 bit byte systems as well. Can anyone recommend a good way to put data into this array, and pull it out later? I'd like to avoid large sections of code which look like: switch( mFormat ) { case 1: // unsigned 8 bit for( int i = 0; i < mChannels; i++ ) framesArray = (uint8_t*)pcm[i]; break; case 2: // signed 8 bit for( int i = 0; i < mChannels; i++ ) framesArray = (int8_t*)pcm[i]; break; case 3: // unsigned 16 bit ... Limitations: I'm working in C/C++, no templates, no RTTI, no STL. Think embedded. Things get trickier when I have to port this to a DSP with 16 bit bytes. Does anybody have any useful macros they might be willing to share? Thanks, -Griff

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  • PHP arrays. There must be a simpler method to do this

    - by RisingSun
    I have this array in php returned from db Array ( [inv_templates] = Array ( [0] = Array ( [inven_subgroup_template_id] = 1 [inven_group] = Wires [inven_subgroup] = CopperWires [inven_template_id] = 1 [inven_template_name] = CopperWires6G [constrained] = 0 [value_constraints] = [accept_range] = 2 - 16 [information] = Measured Manual ) [1] = Array ( [inven_subgroup_template_id] = 1 [inven_group] = Wires [inven_subgroup] = CopperWires [inven_template_id] = 2 [inven_template_name] = CopperWires2G [constrained] = 0 [value_constraints] = [accept_range] = 1 - 7 [information] = Measured by Automated Calipers ) ) ) I need to output this kind of multidimensional stuff Array ( [Wires] = Array ( [inv_group_name] = Wires [inv_subgroups] = Array ( [CopperWires] = Array ( [inv_subgroup_id] = 1 [inv_subgroup_name] = CopperWires [inv_templates] = Array ( [CopperWires6G] = Array ( [inv_name] = CopperWires6G [inv_id] = 1 ) [CopperWires2G] = Array ( [inv_name] = CopperWires2G [inv_id] = 2 ) ) ) ) ) ) I currently do this stuff foreach ($data['inv_templates'] as $key = $value) { $processeddata[$value['inven_group']]['inv_group_name'] = $value['inven_group']; $processeddata[$value['inven_group']]['inv_subgroups'][$value['inven_subgroup']]['inv_subgroup_id'] = $value['inven_subgroup_template_id']; $processeddata[$value['inven_group']]['inv_subgroups'][$value['inven_subgroup']]['inv_subgroup_name'] = $value['inven_subgroup']; $processeddata[$value['inven_group']]['inv_subgroups'][$value['inven_subgroup']]['inv_templates'][$value['inven_template_name']]['inv_name'] = $value['inven_template_name']; $processeddata[$value['inven_group']]['inv_subgroups'][$value['inven_subgroup']]['inv_templates'][$value['inven_template_name']]['inv_id'] = $value['inven_template_id']; } return $processeddata; EDIT : A var_export array ( 'inv_templates' = array ( 0 = array ( 'inven_subgroup_template_id' = '1', 'inven_group' = 'Wires', 'inven_subgroup' = 'CopperWires', 'inven_template_id' = '1', 'inven_template_name' = 'CopperWires6G', 'constrained' = '0', 'value_constraints' = '', 'accept_range' = '2 - 16', 'information' = 'Measured Manual', ), 1 = array ( 'inven_subgroup_template_id' = '1', 'inven_group' = 'Wires', 'inven_subgroup' = 'CopperWires', 'inven_template_id' = '2', 'inven_template_name' = 'CopperWires6G', 'constrained' = '0', 'value_constraints' = '', 'accept_range' = '1 - 7', 'information' = 'Measured by Automated Calipers', ), ), ) The foreach is almost unreadable. There must be a simpler way

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  • How to create Hash object/array using jquery?

    - by Patrick
    Hi folks I know there is a Hash() object in the Javascript prototype framework, but is there anything in Jquery like this? As I would like to stick with one javascript framework, rather than mixing the Prototype Frame work and the JQuery framework and use at the same time, as I worry there will be conflict and create side-effects. So my question is: how to create Hash object/array using jquery? Here is my function: /* prototype framework, I want to change this to jQuery! */ var starSaves = new Hash(); function myHover(id, pos) { var starStrip = $('star_strip_' + id); if (starSaves.keys().indexOf(id) == -1) { var starSave = new Array(); var imgs = starStrip.select("img") alert(imgs); for (var i = 0; i < imgs.length; i++) { starSave[starSave.length] = imgs[i].src; if (i < pos) imgs[i].src = "/images/star_1.gif"; else imgs[i].src = "/images/star_0.gif"; } starSaves.set(id, starSave); } }

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  • Array loading with doubles in C

    - by user2892120
    I am trying to load a 3x8 array of doubles but my code keeps outputting 0.00 for all of the values. The code should be outputting the array (same as the input) under the Read#1 Read#2 Read#3 lines, with the average under average. Here is my code: #include <stdio.h> double getAvg(double num1, double num2, double num3); int main() { int numJ,month,day,year,i,j; double arr[3][8]; scanf("%d %d %d %d",&numJ,&month,&day,&year); for (i = 0; i < 8; i++) { scanf("%f %f %f",&arr[i][0], &arr[i][1], &arr[i][2]); } printf("\nJob %d Date: %d/%d/%d",numJ,month,day,year); printf("\n\nLocation Read#1 Read#2 Read#3 Average"); for (j = 0; j < 8; j++) { printf("\n %d %.2f %.2f %.2f %.2f",j+1,arr[j][0],arr[j] [1],arr[j][2],getAvg(arr[j][0],arr[j][1],arr[j][2])); } return 0; } double getAvg(double num1, double num2, double num3) { double avg = (num1 + num2 + num3) / 3; return avg; } Input example: 157932 09 01 2013 0.00 0.00 0.00 0.36 0.27 0.23 0.18 0.16 0.26 0.27 0.00 0.34 0.24 0.00 0.31 0.16 0.33 0.36 0.29 0.36 0.00 0.21 0.36 0.00

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  • Timer in java ,time difference problem

    - by javatechi
    I want to create a timer for my app. The sample code is shown below. When the method datetwo() is called the same time in milliseconds is shown as there in the main method. Please help me out with this import java.util.Date; import java.util.Timer; public class TimerChe { Timer timer; static Date date = new Date(); static Date date2 = new Date(); public static void timerMethod(){ new Thread() { public void run() { try { while (true) { sleep(10000); datetwo(); } } catch (InterruptedException ex) { } } }.start(); } public static void datetwo() { System.out.println ("OK, It's time to do something!") ; System.out.println("The Time is " + date2.getTime() + " milliseconds since 1970/01/01"); } public static void main(String args[]) throws Exception { System.out.println("The Time is " + date.getTime() + " milliseconds since 1970/01/01" ); System.out.println ("Schedule something to do in the mean time.") ; timerMethod(); } }

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  • What's the difference between these SQL conditions?

    - by wesley luan
    Select * from Example where 1 = Case when :index = 0 then Case when DateEx Between :pDat1 and :pDate2 then 1 end else Case When :index = 1 or :index = 2 then Case When DateEx >= :pDat1 then 1 end end end And Select * from Example where 1 = Case when :index = 0 then Case when DateEx Between :pDat1 and :pDat2 then 1 end else 1 end and 1 = Case When :index = 1 or :index = 2 then Case When DateEx >= :pDat1 then 1 end end

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  • A better way of getting a data table with various column types into string array

    - by Vlad
    This should be an easy one, looks like I got myself too confused. I get a table from a database, data ranges from varchar to int to Null values. Cheap and dirty way of converting this into a tab-delimited file that I already have is this (shrunken to preserve space, ugliness is kept on par with original): da.Fill(dt) ' da - DataAdapter ' ' dt - DataTable ' Dim lColumns As Long = dt.Columns.Count Dim arrColumns(dt.Columns.Count) As String Dim arrData(dt.Columns.Count) As Object Dim j As Long = 0 Dim arrData(dt.Columns.Count) As Object For i = 0 To dt.Rows.Count - 1 arrData = dt.Rows(i).ItemArray() For j = 0 To arrData.GetUpperBound(0) - 1 arrColumns(j) = arrData(j).ToString Next wrtOutput.WriteLine(String.Join(strFieldDelimiter, arrColumns)) Array.Clear(arrColumns, 0, arrColumns.GetLength(0)) Array.Clear(arrData, 0, arrData.GetLength(0)) Next Not only this is ugly and inefficient, it is also getting on my nerves. Besides, I want, if possible, to avoid the infamous double-loop through the table. I would really appreciate a clean and safe way of rewriting this piece. I like the approach that is used here - especially that is trying to solve the same problem that I have, but it crashes on me when I apply it to my case directly.

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  • How to get time difference in milliseconds

    - by jason45
    Hi, I can't wrap my brain around this one so I hope someone can help. I have a song track that has the song length in milliseconds. I also have the date the song played in DATETIME format. What I am trying to do is find out how many milliseconds is left in the song play time. Example $tracktime = 219238; $dateplayed = '2011-01-17 11:01:44'; $starttime = strtotime($dateplayed); I am using the following to determine time left but it does not seem correct. $curtime = time(); $timeleft = $starttime+round($tracktime/1000)-$curtime; Any help would be greatly appreciated.

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  • C++ dynamic array causes segmentation fault at assigment

    - by opc0de
    I am doing a application witch uses sockets so I am holding in an array the sockets handles.I have the following code: while(0 == 0){ int * tx = (int*)(malloc((nr_con + 2) * sizeof(int))); if (conexiuni != NULL) { syslog(LOG_NOTICE,"Ajung la eliberare %d",nr_con); memcpy(&tx[0],&conexiuni[0],(sizeof(int) * (nr_con))); syslog(LOG_NOTICE,"Ajung la eliberare %d",nr_con); free(conexiuni); } conexiuni = tx; syslog(LOG_NOTICE,"Ajung la mama %d",nr_con); //The line bellow causes a segfault at second connection if ((conexiuni[nr_con] = accept(hsock,(sockaddr*)(&sadr),&addr_size)) != -1) { nr_con++; syslog(LOG_NOTICE,"Primesc de la %s",inet_ntoa(sadr.sin_addr)); syslog(LOG_NOTICE,"kkt %d",conexiuni[nr_con - 1]); int * sz = (int*)malloc(sizeof(int)); *sz = conexiuni[nr_con - 1]; syslog(LOG_NOTICE,"after %d",*sz); pthread_create(&tidi,0,&ConexiuniHandler, sz); } } When I connect the second time when I assign the array the program crashes. What am I doing wrong? I tried the same code on Windows and it works well but on Linux it crashes.

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  • Time difference in seconds (as a floating point)

    - by pocoa
    >>> from datetime import datetime >>> t1 = datetime.now() >>> t2 = datetime.now() >>> delta = t2 - t1 >>> delta.seconds 7 >>> delta.microseconds 631000 Is there any way to get that as 7.631000 ? I can use time module, but I also need that t1 and t2 variables as DateTime objects. So if there is a way to do it with datettime, that would be great.

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  • Difference between DirectCast() and CType() in VB.Net

    - by Chapso
    I am an experienced C/C++/C# programmer who has just gotten into VB.NET. I generally use CType (and CInt, CBool, CStr) for casts because it is less characters and was the first way of casting which I was exposed to, but I am aware of DirectCast and TryCast as well. Simply, are there any differences (effect of cast, performance, etc.) between DirectCast and CType? I understand the idea of TryCast.

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  • Ruby - Nokogiri - Need to put node.value to an array

    - by r3nrut
    What I'm trying to do is read the value for all the nodes in this XML and put them into an array. This should be simple but for some reason it's driving me nuts. XML <ArrayOfAddress> <Address> <AddressId>297424fe-cfff-4ee1-8faa-162971d2645f</AddressId> <FirstName>George</FirstName> <LastName>Washington</LastName> <Address1>123 Main St</Address1> <Address2>Apt #611</Address2> <City>New York</City> <State>NY</State> <PostalCode>10110</PostalCode> <CountryCode>US</CountryCode> <EmailAddress>[email protected]</EmailAddress> <PhoneNumber>5555551234</PhoneNumber> <AddressType>CustomerAddress</AddressType> </Address> </ArrayOfAddress> Code class MassageRepsone def parse_resp @@get_address.url_builder #URL passed through HTTPClient - @@resp is the xml above doc = Nokogiri::XML::Reader(@@resp) @@values = doc.each do |node| node.value end end @@get_address.parse_resp obj = [@@values] Array(obj) p obj end The code snippet from above returns the following: 297424fe-cfff-4ee1-8faa-162971d2645f George Washington 123 Main St Apt #622 New York NY 10110 US test.test.com 5555551234 CustomerAddress I tried putting @@values to a string and applying chomp but that just prints the newlines as nil and puts quotes around the values. Not sure what the next step is or if I need to approach this differently with Nokogiri.

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  • Storing Result set into an array

    - by OVERTONE
    i know this should be simpel and im probably staring straight at the problem but once again im stuck and need the help of the code gurus. im trying too take one row from a column in jdbc, and put them in an array. i do this as follows: public void fillContactList() { createConnection(); try { Statement stmt = conn.createStatement(); ResultSet namesList = stmt.executeQuery("SELECT name FROM Users"); try { while (namesList.next()) { contactListNames[1] = namesList.getString(1); System.out.println("" + contactListNames[1]); } } catch(SQLException q) { } conn.commit(); stmt.close(); conn.close(); } catch(SQLException e) { } creatConnection is an already defined method that does what it obviously does. i creat my result set while theres another one, i store the string of that column into an array. then print it out for good measure. too make sure its there. the problem is that its storing the entire column into contactListNames[1] i wanted to make it store column1 row 1 into [1] then column 1 row 2 into [2] i know i could do this with a loop. but i dont know too take only one row at a time from a single column. any ideas? p.s ive read the api, i jsut cant see anything that fits.

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  • Post JSON array to mvc controller

    - by Yustme
    I'm trying to post a JSON array to a mvc controller. But no matter what i try, everything is 0 or null. I have this table that contains textboxes. I need from all those textboxes it's ID and value as an object. This is my java code: $(document).ready(function () { $('#submitTest').click(function (e) { var $form = $('form'); var trans = new Array(); var parameters = { TransIDs: $("#TransID").val(), ItemIDs: $("#ItemID").val(), TypeIDs: $("#TypeID").val(), }; trans.push(parameters); if ($form.valid()) { $.ajax( { url: $form.attr('action'), type: $form.attr('method'), data: JSON.stringify(parameters), dataType: "json", contentType: "application/json; charset=utf-8", success: function (result) { $('#result').text(result.redirectTo) if (result.Success == true) { return fase; } else { $('#Error').html(result.Html); } }, error: function (request) { alert(request.statusText) } }); } e.preventDefault(); return false; }); }); This is my view code: <table> <tr> <th>trans</th> <th>Item</th> <th>Type</th> </tr> @foreach (var t in Model.Types.ToList()) { { <tr> <td> <input type="hidden" value="@t.TransID" id="TransID" /> <input type="hidden" value="@t.ItemID" id="ItemID" /> <input type="hidden" value="@t.TypeID" id="TypeID" /> </td> </tr> } } </table> This is the controller im trying to receive the data to: [HttpPost] public ActionResult Update(CustomTypeModel ctm) { return RedirectToAction("Index"); } What am i doing wrong?

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  • What's the difference between the [OptionalField] and [NonSerialized]

    - by IbrarMumtaz
    I came across this question on transcender: What should you apply to a field if its value is not required during deserialization? Me = [NonSerialized], ANSWER = [OptionalField] My gut reaction was NonSerialised, I have no idea why but in the space of 5 seconds thats what I thought but to my surprise, Transcender says I am wrong. OK fair enough .... but why? looking more closely at the question I have a good idea what to look out for as far as the [Nonseralized] attribute is concerned but still I would really like this clearing up. As far as I can tell the former has relationship with versioning conflicts between newer and older versions of the same assembly. The later is more concerned with not serializing a field FULLSTOP. Is there anything else that might pick these two apart? MSDN does not really say much about this as they both are used on the BinaryFormatters and SoapFormatter with the XMLFormatter using the XMLIgnoreAttribute. My second question is can you mix and match either one of the two attributes ... I am yet to use them as I have not had an excuse to mess about with them. So my curiosity can only go so far. Just throwing this one out there, but does my answer have something to do with the way [OnDeserialized] and the IdeserilizationCallback interface is implemented???? Am guessing here .... Thanks In Advance UPDATE: I know that optional field attribute does not serialize the value held by a data member but NonSerialized will not even serialise the data member or its value. That sounds about a right???? That's all I got on these two attributes.

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