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  • Drawing a waveform in C#

    - by user488792
    Hi! I want to be able to display a WaveForm in C#, along with some simple features such as zooming and selection. I already have the data as a short[] of amplitude values. However, I am an amateur when it comes to hardcoding GUI. I have already found a possible helper class WaveFormClass that may help me achieve this but as a backup, I want to learn how to manually do it. So may I ask for some methods and possibly some links that will help? Thanks!

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  • mysql NO_AUTO_VALUE_ON_ZERO problem

    - by every_answer_gets_a_point
    at least i think that is what the problem is. i am updating a mysql database through excel using an odbc like this: With rs .AddNew ' create a new record ' add values to each field in the record .Fields("datapath") = dpath .Fields("analysistime") = atime .Fields("reporttime") = rtime .Fields("lastcalib") = lcalib .Fields("analystname") = aname .Fields("reportname") = rname .Fields("batchstate") = "bstate" .Fields("instrument") = "NA" .Update ' stores the new record End With besides the fields above, i also have a primary key auto_increment field called rowid for some reason the only field that gets updated is instrument. none of the other fields get updated.. however, when i try to do the same updating on a table that has no ROWID auto_increment field, it works perfectly has anyone else experienced this kind of issue before?

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  • Assigning a pointer variable to a const int in C++?

    - by John
    I'm wondering if anyone can explain the following to me: If I write int i = 0; float* pf = i; I get a compile error (gcc 4.2.1): error: invalid conversion from ‘int’ to ‘float*’ Makes sense - they are obviously two completely different types. But if instead I write const int i = 0; float* pf = i; It compiles without error. Why should the 'const' make a difference on the right hand side of the assignment? Isn't part of the idea of the 'const' keyword to be able to enforce type constraints for constant values? Any explanation I have been able to come up with feels kind of bogus. And none of my explanations also explain the fact that const int i = 1; float* pf = i; fails to compile. Can anyone offer an explanation?

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  • Getting records from a table based on a filter field and Between but also having the OR login for mu

    - by Pentium10
    I have a this table, where I store multiple ids and an age range (def1,def2) CREATE TABLE "template_requirements" ("_id" INTEGER NOT NULL, "templateid" INTEGER, "def1" VARCHAR(255), "def2" VARCHAR(255), PRIMARY KEY("_id")) Having values such as: templateid | def1 | def2 100 | 7 | 25 200 | 40 | 90 300 | 7 | 25 300 | 40 | 60 as you see for templateid 300 we have an or logic: age between 7 and 25 or age between 40 and 60. I want to get all the template ids that are not for a certain age like 25... What's the problem? If I run a query like this one: SELECT group_concat(templateid) FROM template_requirements where and '25' not between cast(def1 as integer) and cast(def2 as integer) it returns 200, 300, which is wrong, as the 300 matched on row 40 to 60, but shouldn't be included in the result as we have a condition with same templateid 7 to 25 that fails the not beetween stuff. How would be the correct query in SQLite, I would like to keep the group_concat stuff.

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  • How do you send an array as part of an (jquery) ajax request

    - by Ankur
    I tried to send an array as part of an ajax request like this: var query = []; // in between I add some values to 'query' $.ajax({ url: "MyServlet", data: query, dataType: "json", success: function(noOfResults) { alert(noOfResults); } }); } I wanted to see what I get back in the servlet, so I used this line: System.out.println(request.getParameterMap().toString()); Which returned {} suggesting an empty map. Firebug tells me I am getting a 400 bad request error If I send a queryString like attribute=value as the 'data' then everything works fine, so it has to do with not being able to send an array as is. What do I have to do to get that data into the servlet for further processing. I don't want to pull it out and turn it into a queryString in the JS if I can avoid it. EDIT: I used the .serializeArray() (jQuery) function before sending the data. I don't get the 400 but nothing useful is being sent through.

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  • How to crosscheck two tables and insert relevant data into a new table in MYSQL?

    - by JackDamery
    I'm trying to crosscheck a row that exists in two tables using a MYSQL query in phpmyadmin and then if a userID is found in both tables, insert their userID and user name into another table. Here's my code: INSERT INTO userswithoutmeetings SELECT user.userID IF('user.userID'='meeting.userID'); I keep getting plagued by this error: 1064 - 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 'IF('user.userID'='meeting.userID')' at line 3 Other statements I've tried have worked but not deposited the values in the table.

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  • Search a string for certain numbers

    - by Hassan Gulzar
    Hello! I'm trying to come up with a lightning fast solution to find portions in a string. Here is a Sample string: "PostLoad successful! You transferred amount of 17.00 Rs to 03334224222. Now use PostLoad by dialing 123. PostLoad on SMS will end on 01-03-2011." Objective: Need to retrieve the bold values: Amount and Cell Number. The string contents change slightly but the cell number will always be a 11 digit. The amount is always with two decimal precision. Any suggestions using C# and RegEx?

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  • Comparing large strings in JavaScript with a hash

    - by user4815162342
    I have a form with a textarea that can contain large amounts of content (say, articles for a blog) edited using one of a number of third party rich text editors. I'm trying to implement something like an autosave feature, which should submit the content through ajax if it's changed. However, I have to work around the fact that some of the editors I have as options don't support an "isdirty" flag, or an "onchange" event which I can use to see if the content has changed since the last save. So, as a workaround, what I'd like to do is keep a copy of the content in a variable (let's call it lastSaveContent), as of the last save, and compare it with the current text when the "autosave" function fires (on a timer) to see if it's different. However, I'm worried about how much memory that could take up with very large documents. Would it be more efficient to store some sort of hash in the lastSaveContent variable, instead of the entire string, and then compare the hash values? If so, can you recommend a good javascript library/jquery plugin that implements an appropriate hash for this requirement?

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  • SQL Full Outer Join

    - by Torment March
    I have a table named 'Logs' with the following values : CheckDate CheckType CheckTime ------------------------------------------- 2011-11-25 IN 14:40:00 2011-11-25 OUT 14:45:00 2011-11-25 IN 14:50:00 2011-11-25 OUT 14:55:00 2011-11-25 IN 15:00:00 2011-11-25 OUT 15:05:00 2011-11-25 IN 15:15:00 2011-11-25 OUT 15:20:00 2011-11-25 IN 15:25:00 2011-11-25 OUT 15:30:00 2011-11-25 OUT 15:40:00 2011-11-25 IN 15:45:00 I want to use the previous table to produce a result of: CheckDate CheckIn CheckOut ----------------------------------------- 2011-11-25 14:40:00 14:45:00 2011-11-25 14:50:00 14:55:00 2011-11-25 15:00:00 15:05:00 2011-11-25 15:15:00 15:20:00 2011-11-25 15:25:00 15:30:00 2011-11-25 NULL 15:40:00 2011-11-25 15:45:00 NULL So far I have come up with this result set : CheckDate CheckIn CheckOut ----------------------------------------- 2011-11-25 14:40:00 14:45:00 2011-11-25 14:50:00 14:55:00 2011-11-25 15:00:00 15:05:00 2011-11-25 15:15:00 15:20:00 2011-11-25 15:25:00 15:30:00 2011-11-25 15:45:00 NULL The problem is I cannot generate the log without CheckIns : CheckDate CheckIn CheckOut ----------------------------------------- 2011-11-25 NULL 15:40:00 The sequence of CheckIn - CheckOut pairing and order is in increasing time value.

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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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  • Is this the right way to have "global" parameters for my servlets?

    - by Geo
    If I have: <context-param> <param-name>SomeParam</param-name> <param-value>SomeValue</param-value> </context-param> in my web.xml, is this the servlet way of specifying options ( like in the way a config file is used ) , or am I doing something wrong? I know about init-param that can be specified for a servlet, but I'd like o make sure some values are the same for all the servlets.

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  • MySQL Group Results by day using timestamp

    - by Webnet
    I need to take the following query and pull the total order counts and sum of the orders grouped by day. I'm storing everything using timestamps. SELECT COUNT(id) as order_count, SUM(price + shipping_price) as order_sum, DAY(FROM_UNIXTIME(created)) as day FROM `order` WHERE '.implode(' AND ', $where).' I need to group by DAY but when I do for this past weekend's sales it takes my order_count and makes it 1 instead of 3. How can I pull the above values grouped by day? NOTE: The implode is used ONLY to define the time period (WHERE created = TIMESTAMP AND <= TIMESTAMP)

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  • Output custom messages based on row value

    - by decimal
    I've made a simple guestbook mysql/php page. An entry is displayed if the approve column has a value of 1. For the adminstrator, I want to display either "message approved" or "not approved". Here's my code: while ($row = mysql_fetch_array ($r)) { print "<p>Guest:" .$row['name']. "</p> <p>Date:" .$row['date']. "</p> <p>Comment:". $row['comment']. "</p>"; if ($row['approve'] = '1') { print '<p>YES, the message has been approved</p>'; } else { print '<p>NO, it hasn\'t been approved</p>'; } Whatever value the if statement checks approve is equal to, all approve values are output as that value.

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  • How can i get the selected option name or id of a select element using jQuery

    - by bill
    Hi All, i have a "questionairre" that is made up of a series of select boxes. i need to use two properties in the options. For each selected option i need the value (which i know how to get and is working fine) but i also need to store an additional value which represents the id of the specific option in a DB. One solution would be to put the two values in the "value" property and parse it out.. but if there is some other property i can use that might be easier and clearer.. can i add a custom property?? like databaseId that could be accessed with jQuery? thanks for ANY suggestions.

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  • Array to string conversion in (cant get it to work)

    - by user2966551
    ok I am trying to pull a a specific row of data that corresponds to the username logged in. on my page I have started my session but for some reason I cant get the code to work.i keep getting a "Array to string conversion in " on the line " WHERE username = '$_SESSION[user]'");" what am I doing wrong? if I set username = a set username it works but I need it to draw from the session id so it will display different values based on whos logged in. <?php $con=mysqli_connect("localhost","root","xxx","xxxx"); // Check connection if (mysqli_connect_errno()) { echo "Failed to connect to MySQL: " . mysqli_connect_error(); } $result = mysqli_query($con,"SELECT * FROM users WHERE username = '$_SESSION[user]'"); while($row = mysqli_fetch_array($result)) { echo $row['username'] . " " . $row['att']; echo "<br>"; } ?>

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  • Capture variable assignments in a Perl eval

    - by Bruce
    I would like to be able to capture variable assignments from a Perl eval. That is, to determine what variable names have been assigned to within the code and extract their value. For example if I run: eval '$foo=42; $bar=3.14;' The result of the eval is 3.14 (the last value evaluated), but I would also like to be able to determine the names "$foo" and "$bar" and their values (without knowing the names in advance). I have read up on a couple of ways of inserting variables into the eval block, through Safe and Eval::Context, but not yet any way of extracting them. I am more familiar with Python's eval/exec which have built in support for this.

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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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  • Fastest method in merging of the two: dicts vs lists

    - by tipu
    I'm doing some indexing and memory is sufficient but CPU isn't. So I have one huge dictionary and then a smaller dictionary I'm merging into the bigger one: big_dict = {"the" : {"1" : 1, "2" : 1, "3" : 1, "4" : 1, "5" : 1}} smaller_dict = {"the" : {"6" : 1, "7" : 1}} #after merging resulting_dict = {"the" : {"1" : 1, "2" : 1, "3" : 1, "4" : 1, "5" : 1, "6" : 1, "7" : 1}} My question is for the values in both dicts, should I use a dict (as displayed above) or list (as displayed below) when my priority is to use as much memory as possible to gain the most out of my CPU? For clarification, using a list would look like: big_dict = {"the" : [1, 2, 3, 4, 5]} smaller_dict = {"the" : [6,7]} #after merging resulting_dict = {"the" : [1, 2, 3, 4, 5, 6, 7]} Side note: The reason I'm using a dict nested into a dict rather than a set nested in a dict is because JSON won't let me do json.dumps because a set isn't key/value pairs, it's (as far as the JSON library is concerned) {"a", "series", "of", "keys"} Also, after choosing between using dict to a list, how would I go about implementing the most efficient, in terms of CPU, method of merging them? I appreciate the help.

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  • How to repair "order by" after union of 2 selects from 1 tables

    - by 4e4el
    I have a dropDownList on my form, where i need to have union of values from 2 colums of table [ost]. Type of this columns is currency. I have russian version of access, default value of curency in "rur" and i need "uah". I need to change format and save "order by". I use this query: (SELECT distinct FORMAT([Sum1] ,'# ##0.00" uah.";-# ##0.00" uah."') FROM ost) Union (SELECT distinct FORMAT([Sum2],'# ##0.00" uah.";-# ##0.00" uah."') FROM ost) ORDER BY 1

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  • Create a basic matrix in C (input by user !)

    - by DM
    Hi there, Im trying to ask the user to enter the number of columns and rows they want in a matrix, and then enter the values in the matrix...Im going to let them insert numbers one row at a time. How can I create such function ? #include<stdio.h> main(){ int mat[10][10],i,j; for(i=0;i<2;i++) for(j=0;j<2;j++){ scanf("%d",&mat[i][j]); } for(i=0;i<2;i++) for(j=0;j<2;j++) printf("%d",mat[i][j]); } This works for inputting the numbers, but it displays them all in one line... The issue here is that I dont know how many columns or rows the user wants, so I cant print out %d %d %d in a matrix form .. Any thoughts ? Thanks :)

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  • Does a CPU assigns a value atomically to memory?

    - by Poni
    Hi! A quick question I've been wondering about for some time; Does the CPU assign values atomically, or, is it bit by bit (say for example a 32bit integer). If it's bit by bit, could another thread accessing this exact location get a "part" of the to-be-assigned value? Think of this: I have two threads and one shared "unsigned int" variable (call it "g_uiVal"). Both threads loop. On is printing "g_uiVal" with printf("%u\n", g_uiVal). The second just increase this number. Will the printing thread ever print something that is totally not or part of "g_uiVal"'s value? In code: unsigned int g_uiVal; void thread_writer() { g_uiVal++; } void thread_reader() { while(1) printf("%u\n", g_uiVal); }

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  • Serialize object from within

    - by Maximus
    I have the class testClass which has the method save. This method saves object to a database. But it needs to serialize object before saving. How can I serialize object from within the class to do that? class testClass { private $prop = 777; public function save() { $serializedObject = serialize(self); DB::insert('objects', array('id', 'object')) ->values(array(1, $serializedObject)) ->execute(); } } serialize(self) obviously doesn't work.

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  • Selecting Data from select tag

    - by user2610240
    i have to select data from select tag rather then selecting value as its selects value for default <select name="time" > <option selected="selected" >timings</option> <option value="155">9:00AM - 12:00PM</option> <option value="244">12:00AM - 15:00PM</option> </select> I want to select 12:00AM - 15:00PM values and store it in my DB. How to do it any ideas. Thanks in advance Ameeth

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  • Problem removing a dynamic form field in jquery

    - by rshivers
    I'm trying to remove a dynamic form field by click a button. It will also subtract whatever values it had from the total amount from my calculation. This is the code: function removeFormField(id) { var id = $(id).attr("name"); $('#target1').text($("#total" + id).map(function() { var currentValue = parseFloat(document.getElementById("currentTotal").value); var newValue = parseFloat($("#total" + id).text()); var newTotal = currentValue - newValue; document.getElementById("currentTotal").value = newTotal; return newTotal; }).get().join()); $(id).remove(); } Okay, it will do the subtraction portion of the code with no problem, this issue is with the last line to remove the field. If I comment out the rest of the code it will work, but not with the rest of the code. I know this is something simple, yet I can't seem to wrap my mind around it. Can someone please help?

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  • Handle CSliderCtl messages placed on a CDialogBar

    - by user173438
    VS2008, 32 Bit Win XP In a class derived from CFrameWnd, I have an object of CDialogBar that needs to have certain controls on it. Among these controls would be 2 sliders, whose event handling is to be done in CFrameWnd derived class. How shall I go about this? class CFrameWndCustom : public CFrameWnd { CDialogBar m_wndDialogBar; // the CDialogBar object. } In CFrameWnd derived class's OnCreateClient, I have created the DialogBar using the above object like: //Create the DialogBar if (!m_wndDialogBar.Create(this, IDD_DIALOGBAR_CONTROL, CBRS_BOTTOM, IDD_DIALOGBAR_CONTROL)) { TRACE("Warning: Couldn't create DialogBar Control!\n"); return FALSE; } Here, IDD_DIALOGBAR_CONTROL is a dialog resource with Style as Child. After this, I drag-dropped a CSliderCtrl on the IDD_DIALOGBAR_CONTROL in Resource View. Now, how/where should I handle the CSliderCtrl's events? There would be 2 such slider controls. I finally need the values of the sliders in CFrameWndCustom class. best regards, Divya

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