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  • Should I be using libraries if I'm trying to learn how to program?

    - by CodeJustin.com
    I have been programming "a lot" in the past few months and at first I was trying to find the "easyest" language. Fortunately I realized that it's not about the language, it's about learning HOW to code. I ran into the Stanford lectures online (programming methodology) and I watched them all (around 23 hours total) awhile ago. Then I got into Java ME and programmed about 28.47% of a mobile RPG game (only around 2k lines of code). I feel like I learned a lot from those two experiences compared to previous ones but now that I'm moving into flash/actionscript 3.0 development and I'm finding myself learning like I did when I first started with PHP. I'm not really getting whats under the hood kind of. I'm finding myself using libraries to speed up development time which doesn't seem like a bad thing BUT I personally do not know how to write the libraries myself off hand. So should I be coding everything myself or is it ok to use libraries when you don't even know how to code them?

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  • Trying to use json to populate areas of my website using mysql, php, and jquery.

    - by RyanPitts
    Ok, so this is my first attempt at doing anything with JSON. I have done a lot with PHP and MySql as well as jQuery and JavaScript...but nothing with JSON. I have some data in a MySql database. In the codes below i am using a PHP file to retrieve the data from the MySql database and using json_encode to format it to JSON. This file is being called by the JavaScript that runs when the page loads (well, it runs on document.ready actually). I then use jQuery to access the JSON keys and values to fill in areas of the page "dynamically". Here is the code snippets i am using (excuse my "noobness" on writing these snippets, still learning all this). This is my script that is on my HTML page test.php: <script type="text/javascript"> $(document).ready(function(){ $.getJSON("json_events.php",function(data){ $.each(data.events, function(i,events){ var tblRow = "<tr>" +"<td>" + events.id + "</td>" +"<td>" + events.customerId + "</td>" +"<td>" + events.filingName + "</td>" +"<td>" + events.title + "</td>" +"<td>" + events.details + "</td>" +"<td>" + events.dateEvent + "</td>" +"<td><a href='assets/customers/testchurch/events/" + events.image + "'>" + events.image + "</a></td>" +"<td>" + events.dateStart + "</td>" +"<td>" + events.dateEnd + "</td>" +"</tr>" $(tblRow).appendTo("#eventsdata tbody"); }); }); $.getJSON("json_events.php",function(data){ $.each(data.events, function(i,events){ $("#title").html("First event title: " + events.title + " ..."); }); }); }); </script> This is the code for the php file being called by the above JS: json_events.php <?php require_once('includes/configread.php'); $arrayEvents = array(); $resultsEvents = mysql_query("SELECT * FROM events"); while($objectEvents = mysql_fetch_object($resultsEvents)) { $arrayEvents[] = $objectEvents; } $json_object_events = json_encode($arrayEvents); $json_events = "{\"events\": " . $json_object_events . " }"; echo $json_events; require_once('includes/closeconnread.php'); ?> This is my JSON that is held in the variable $json_events from my php file json_events.php: { "events": [ { "id": "2", "customerId": "1004", "filingName": "testchurch", "title": "Kenya 2011 Training Meeting", "details": "This meeting will be taking place on Sunday, February 10th @ 6pm. Get ready for our annual Kenya trip in 2011. We have been blessed to be able to take this trip for the past 3 years. Now, it's your turn to bless others! Come to this training meeting to learn how to minister to the people in Kenya and also learn what we'll be doing there.", "dateEvent": "2011-02-10", "image": "kenya2011.jpg", "dateStart": "2010-09-04", "dateEnd": "2011-02-10" }, { "id": "6", "customerId": "1004", "filingName": "testchurch", "title": "New Series: The Journey", "details": "We will be starting our new series titled "The Journey". Come worship with us as we walk with Paul on his 2nd missionary journey.", "dateEvent": "2011-01-02", "image": "", "dateStart": "2010-09-06", "dateEnd": "2011-01-02" } ] } This is my HTML on test.php: <table id="eventsdata" border="1"> <thead> <tr> <th>id</th> <th>customerId</th> <th>filingName</th> <th>title</th> <th>details</th> <th>dateEvent</th> <th>image</th> <th>dateStart</th> <th>dateEnd</th> </tr> </thead> <tbody></tbody> </table> <div id="title"></div> I have two questions really... Question 1: Does this code look like it is written correctly at first glance? Question 2: I want to be able to select only the title from the first event in the JSON array. The code i am using now is selecting the second events' title by default it seems. How can i accomplish this?

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  • How to move to another view without using a button

    - by Will
    My first view displays an image and action indicator while web-servers and database function are run in that background. I want the application to go to my tab view when the functions have been completed. How do I do this? Here is what the views look like. What I have tried: TabBarViewController *tab = [[TabBarViewController alloc]init]; [self presentViewController:tab animated:NO completion:nil]; and [self performSegueWithIdentifier:@"first" sender:self]; Please can you help my to understand how to do this. I have spent many hours googling this problem and couldn't work out how to do it. Thanks EDIT: Added Code

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  • Thread Jobs in Java

    - by Bragaadeesh
    Hi, I want to spawn 200 threads simultaneously in Java. What I'm doing right now is running into a loop and creating 200 threads and starting them. After these 200 gets completed, I want to spawn another 200 set of threads and so on. The gist here is that the first 200 threads I spawned need to be FINISHED before spawning the next set. I tried the code below, but its not working for(int i=0;i<200;i++){ Thread myThread = new Thread(runnableInstance); myThread.start(); } for(int i=0;i<200;i++){ Thread myThread = new Thread(runnableInstance); myThread.start(); } Note: I have intentionally put the for loop Twice, but the desired effect I intend is not happening simply because the second for loop is executed before the first set of threads end their execution. Please advise

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  • How to extract certain columns from a big Notepad text file?

    - by user560464
    I have a big text file and the data in it are in 5 columns, but I need just the first and the last column of that. It will take many days and probably with mistake if I want to enter the data of this two column one-by-one from here to another file. Is there a fast way to do this? For example: 1 1.0000000000000000 0.0000000000 S {0} 2 1.5000000000000000 0.3010299957 C {2} 3 1.7500000000000000 0.6020599913 S {0,2} 4 2.0000000000000000 0.7781512504 C {3} 5 2.3333333333333333 1.0791812460 C {3,2} 6 2.5000000000000000 1.3802112417 S {3,0,2} 7 2.5277777777777778 1.5563025008 S {0,3} 8 2.5833333333333333 1.6812412374 S {3,0,0,2} 9 2.8000000000000000 1.7781512504 C {5,2} 10 3.0000000000000000 2.0791812460 C {5,0,2} I need the first column (numbering) and the last inside { }.

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  • Can I set JFrame's normal size while it is maximized?

    - by icza
    I'd like to set the normal size of a visible JFrame while it is in Frame.MAXIMIZED_BOTH state (by normal size i mean the size of frame when it is in Frame.NORMAL state) . The reason I want to do this is so that when the user un-maximizes the frame, it will have the proper size I want it to be. But if I do so, the window will switch to normal state. If I set the size first, then switch to MAXIMIZED_BOTH state, then I will see a disturbing blink or resize (which I don't want to). I've also tried setting the size first, then changing state to MAXIMIZED_BOTH, and then making it visible, but the state change is deferred if the window is not visible (and will only be executed once it is made visible, also resulting in a visual resize). So what can I do if I want my frame to have a predefined normal size, but I want it to appear maximized?

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  • Is there a Twitter Bootstrap class that means "initially hidden"?

    - by bgp
    Using Bootstrap 3, I have an element on a page I want to show later in response to the user clicking a button. Example: <div id="search_results"> ... gets populated from ajax data later ... </div> <button id="search_button" type="button" class="btn btn-primary pull-right">Search</button> <script> $('#search_button').click(function() { // ... do the call to search // and in the callback: $('#search_results').show(); }); </script> The search_results div should be initially hidden. Is there some normal/best practice way of doing this with bootstrap? Yes, I do realize I can just put style="display:none" on search_results, but is that the best way to do it? It would seem to be a bit better to have a style that semantically means "initially hidden". (NOTE: The hidden or hide classes don't do this as they are !important and show(), toggle(), etc. use an inline style which does not override them, i.e. setting "hidden" as the class makes it unshowable from jQuery.)

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  • titleForHeaderInSection is not updating Section Header information correctly

    - by Jim
    I have two tableviews where one navigates to the next. Both use more or less the same code and use the managedObjectContext and FetchedResultsController design pattern to provide the relevant data for both tables. My problem happens when I navigate from the first to the second tableview and the data has only one Section Header / Row in the tableview. The data will then not update Section Header information. It does when there is more than one row but not if there is only one row. It leaves the information from the first attempt in place. I can confirm the row data is correct so the relevant data should be being passed to the Section Header correctly but it isn't. Has anyone else come across this problem?

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  • Rewriting Live TCP/IP (Layer 4) Streams

    - by user213060
    I want to rewrite TCP/IP streams. Ettercap's etterfilter command lets you perform simple live replacements of TCP/IP data based on fixed strings or regexes. Example: if (ip.proto == TCP && tcp.dst == 80) { if (search(DATA.data, "gzip")) { replace("gzip", " "); msg("whited out gzip\n"); } } if (ip.proto == TCP && tcp.dst == 80) { if (search(DATA.data, "deflate")) { replace("deflate", " "); msg("whited out deflate\n"); } } http://ettercap.sourceforge.net/forum/viewtopic.php?t=2833 I would like to rewrite streams based on my own filter program instead of just simple string replacements. Anyone have an idea of how to do this? Is there anything other than Ettercap that can do live replacement like this, maybe as a plugin to a VPN software or something? The rewriting should occur at the transport layer (Layer 4) as it does in this example, instead of a lower layer packet-based approach. Thanks!

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  • compare two characters based on subset

    - by schultem
    I have a simple dataframe with two columns: df <- data.frame(x = c(1,1,2,2,3), y = c(rep(1:2,2),1), target = c('a','a','a','b','a')) I would like to compare the strings in the target column (find out whether they are equal or not, i.e., TRUE or FALSE) within every level of x (same number for x). First I would like to compare lines 1 and 2, then 3 and 4 ... My problem is that I am missing some comparisons, for example, line 5 has only one case instead of two - so it should turn out to be FALSE. Variable y indicates the first and second case within x. I played around with ddply doing something like: ddply(df, .(x), summarise, ifelse(as.character(df[df$y == '1',]$target), as.character(df[df$y == '2',]$target),0,1)) which is ugly ... and does not work ... Any insights how I could achieve this comparison? Thanks

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  • Qt hide QLayout (switch between two layouts)

    - by Lodhart
    I didn't find solution for my problem with two QLayouts. I need app with QHBoxLayout with possible expandind when I will add new widgets, push buttons, .... So what I have: One QDialog and two layouts. Now I know that I can't hide the layout. So I tray just : layout()->removeItem(firstlayout); layout()->addLayout(secondLayout); But when I did this, I saw all items in first layout on possition [0,0]. So next step I try: for (all items in first layout) if (widget) widget->hide(); But this is working only with QWidget and I have many different items in layouts. Simply way is use the widget, because there is possibole to use hide/show, but I need auto expanding window when I add new items.

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  • Is using a DataSet's column Expression works in background same as manual calculation?

    - by Harikrishna
    I have one datatable which is not bindided and records are coming from the file by parsing it in the datatable dynamically every time. Now there is three columns in the datatable Marks1,Marks2 and FinalMarks. And their types is decimal. Now for making addition of columns Marks1 and Marks2 's records and store it into FinalMarks column,For that what I do is : datatableResult.Columns["FinalMarks"].Expression="Marks1+Marks2"; It's works properly. It can be done in other way also is foreach (DataRow r in datatableResult.Rows) { r["FinalMarks"]=Convert.ToDecimal(r["Marks1"])+Convert.ToDecimal(r["Marks2"]); } Is first approach same as second approach in background means is both approach same or what? EDIT: I want to know that first approach works in background as second approach.

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  • How do i resolve method Overlapping in java/Processing [duplicate]

    - by user3718913
    This question already has an answer here: How do I compare strings in Java? 24 answers I have two methods/function in a class, called, Qestion1 and Question2, i want it in such a way that after the user has answered Question one correctly, the Question 2 method is called. Whenever i call the method 2, it displays both of them together instead exiting the first method first. Here's a dummy code to illustrate what i'm saying: void Question1() { String question="What is the capital of England?"; String Answer="London"; if(Answer=='London') { Question2(); } } void Question2() { String question="What is the capital of California?"; String Answer="Sacramento"; if(Answer=='Sacramento') { Question3(); } } Pls, this question is in no way related to that other question. Pls peruse the thread again.

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  • Multible jquery .load() methods not running concurrently in MVC 2

    - by Boob
    In one of my aspx pages i have something like this in the head: <script type="text/javascript"> $(function() { // Jquery stuff loadStuff(); }); function loadStuff() { $('#result1').load({ source: url }); $('#result2').load({ source: url }); $('#result3').load({ source: url }); }; </script> The idea being that as the page is being displayed these loads will populate the specified divs with results from different webservices as and when the info becomes available. My problem is that this requests are being queued and being sent one at a time. However I want these to be sent at the same time and whichever returns first gets displayed first! Also if I try to kick off another request while these divs are loading the request seems to get queued after the others. How do I make these requests concurrent instead of queued? Thanks

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  • Cannot translate date formats from rails form to mysql db

    - by Steve
    I have a simple search form in rails 3 that has two date fields. I'm having a problem getting these dates into my mysql db. I've tried using the american_date gem, specifying date formats in my initializers, in the config/locales/en.yml file, and directly on the date on the date fields themselves. Currently, I'm setting the rails-approved date format in the view - <%= f.text_field :depart_date, :value=> Date.today.strftime('%Y-%m-%d') %> The dateformat in my DB is also YYYY-mm-dd, so things should be going smoothly. The console tells me that the two date fields are both class = "Date" I think I've found the disconnect. From the logs - Started POST "/searches" for 127.0.0.1 at 2013-10-30 17:43:26 -0400 Processing by SearchesController#create as HTML Parameters: {"utf8"=>"v","search"=>{"depart_date"=>"2013-10-30", "return_date"=>"2013-11-09"} ?[1m?[35m (0.0ms)?[0m BEGIN ?[1m?[36mSQL (0.0ms)?[0m ?[1mINSERT INTO `searches` (`depart_date`,`return_date`) VALUES ('2013-30-10','2013-09-11')?[0m ?[1m?[35m (2.0ms)?[0m COMMIT Note that the month and day values are switched in the insert statement. How can I prevent this from happenening?

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  • Background loading javascript into iframe without using jQuery/Ajax?

    - by user210099
    I'm working on an offline only help system which requires loading a large amount of search-related data into an iframe before the search functionality can be used. Due to the folder structure of the project, I am unable to use Ajax-related background load methods, since the files I need are loaded a few directories "up and over." I have written some code which delays the loading of the help data until the rest of the webpage is loaded. The help data consists of a bunch of javascript files which have information about the terms, ect that exist in the help books which are installed on the system. The webpage works fine, until I start to load this help data into a hidden iframe. While the javascript files are loading, I can not use any of the webpage. Links that require a small files be downloaded for hover over effects don't show up, javascript (switching tabs on the page) has no effect. I'm wondering if this is just a limitation of the way javascript works, or if there's something else going on here. Once all the files are loaded for the help system, the webpage works as expected. function test(){ var MGCFrame = eval("parent.parent"); if((ALLFRAMESLOADED == true)){ t2 = MGCFrame.setTimeout("this.IHHeader.frames[0].loadData()",1); } else{ t1 = MGCFrame.setTimeout("this.IHHeader.frames[0].test()",1000); } } Load data simply starts the data loading process. Thanks for any help you can provide.

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  • Find the period of over speed ?

    - by Vimvq1987
    Just something interesting come in my mind. Assume that we have a table (in SQL Server) like this: Location Velocity Time What is the best way to determine over speed periods (speed barrier is defined) ? My first idea was loading the table into an array, and then iterate over array to find these periods: (Pseudo C# code) bool isOverSpeed = false; for (int i =0;i<arr.Length;i++) { if (!isOverSpeed) if (arr[i].Velocity > speedBarrier) { #insert the first record into another array. isOverSpeed = true; } if(isOverSpeed) if (arr[i].Velocity < speedBarrier) { #insert the record into that array isOverSpeed = false; } } It works, but somewhat "not very effectively". Is there a "smarter" way, such as a T-SQL query or another algorithm to do this?

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  • Can I do this in only one query ?

    - by Paté
    Merry christmas everyone, I Know my way around SQL but I'm having a hard time figuring this one out. First here are my tables (examples) User id name friend from //userid to //userid If user 1 is friend with user 10 then you a row with 1,10. User 1 cannot be friend with user 10 if user 10 is not friend with user 1 so you have 1,10 10,1 It may look weird but I need those two rows per relations. Now I'm trying to make a query to select the users that have the most mutual friend with a given user. For example User 1 is friend with user 10,9 and 7 and user 8 is friend with 10,9 and 7 too ,I want to suggest user 1 to invite him (like facebook). I want to get like the 10 first people with the most mutual friend. The output would be like User,NumOfMutualFriends I dont know if that can be done in a single query ? Thanks in advance for any help.

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  • Why is it when I set "closeOnEscape" to false and then "closeOnEscape" to true jquery dialog escape

    - by chobo2
    Hi I am using jquery ui 1.8 and I have a model dialog that popups up and if a user clicks on a checkbox another one comes up. This requires them to say "yes" or "no" so I removed the "X" on the dialog and put closeOnEscape to false. However I noticed when I did that the model dialog underneath it would close when they hit escape. So now when the one that pops up when the checkbox is checked I disable closeOnEscape on the first dialog box. When they close it I enable again yet it does not work. I am not sure why $("#Dialog").dialog( "option", "closeOnEscape", true); I even do this in firebug. I just open my first dialog up Do this in firebugs console $("#Dialog").dialog( "option", "closeOnEscape", false); Then verify that escape is now disabled. I then try to enable it again $("#Dialog").dialog( "option", "closeOnEscape", true); Yet it never enables.

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  • Passing parameters among views in a navigation frame INSIDE a custom control

    - by NetWriter
    I created a silverlight 3 application with a navigation frame and 3 views: search, add and edit. I used the app file to pass parameters among the 3 pages, eg: ((App)Application.Current).SNIPSELECTED = currentSnip; Then in the receiving page: currentSnip = ((App)Application.Current).SNIPSELECTED; currentSnip is a SnipItem object: public class SnipItem { public string itemID {get;set;} public string category {get;set;} public string itemDescription {get;set;} public string codeSnip {get;set;} } This worked fine until I decided to make this entire application into a user control and put that inside a second silverlight application with its own navigation frame and app file. The app files are getting confused. The first app file with all my parameter passing is not being read. I know how to pass a simple parameter between views in the first application without the app file (in a query string), but how about these custom types like my currentSnip above?

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  • Is this the correct way to build a Perl hash that utilizes arrays?

    - by Structure
    This is the first time I have manipulated hashes and arrays in this way -- and it is working. Basically, for every key there are multiple values that I want to record and then print out in the form "key -- value -- value -- val..." My code is as follows. I am surprised that it works, so concerned that it works "by mistake". Is this the correct way to accomplish this task, or is there a more efficient or appropriate method? while ($source =~ m/(regex)/g) { #Get all key names from source $listkey = $1; #Set current list key to the current regex result. $list{$listkey} = ++$i unless $list{$listkey}; #Add the key to the hash unless it already exists. $list{$listkey} = [] unless exists $list{$listkey}; #Add an array for the hash unless the hash already exists. while ($loopcount==0) { if ($ifcount==0) { $listvalue=result_of_some_function_using_list_key; #Get the first list value from the list key. $ifcount++; #Increment so we only get the first list value once. } else { $listvalue=result_of_some_function_using_list_value; #Update the last list value. } if ($listvalue) { #If the function returned a value... push @{$list{$listkey}}, $listvalue; #...then add the value to the hash array for the key. } else { #There are no more values and we need a new key. $listkey=0; #Reset variable. $domain=0; #Reset variable. $loopcount++; #Increment loop counter to exit loop. } } $ifcount=0; #Reset count variable so the next listvalue can be generated from the new key. $loopcount=0; #Reset count variable so another loop can begin for a new key. } foreach $listkey (keys %list) { #For each key in the hash. print "$listkey --> "; #Print the key. @values = @{$list{$listkey}}; #Reference the arrays of the hash. print join ' --> ', @values; #Print the values. print "\n"; #Print new line. }

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  • Prolem with if function

    - by Ryan
    Hi, something seems to be wrong with the first line of this if function, seems alright to me though. if ($count1 == sizeof($map) && $count2 == sizeof($map[0])){ echo ";"; }else{ echo ","; } This is the error I get (line 36 is the first line of the above line.) Parse error: parse error in C:\wamp\www\game\mapArrayConvertor.php on line 36 EDIT: The OP notes in an answer below that the error was a missing semi-colon on line 35 and not the code included in the question.

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