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  • PHP, manipulating images and thumbnails?

    - by learner.php
    I am using php and mysql. I allow my registered users to upload photos, the photos are store in filesystem format, then I will keep the original/max size of : width: 1600px and heigh: 1200px. In the user profile page, I would like to display the image, it maybe one of the 5 types of thumnails: 500x500, 300x300, 200x200, 100x100 or 50x50. What is the best way to create the thumbnails, here are my current solutions: I am thinking of create 1 thumbnail, then from that thumbnail, i will resize in [img src="" width="XX"] tag, alternatively, store the different thumbnails size in database, then get and display it Create 5 thumbnails for each photos? (I am afraid this is a bad way) Whats the best practices?

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  • Java data structure to use with Hibernate to store unknown number of parameters?

    - by Lunikon
    Following problem: I want to render a news stream of short messages based on localized texts. In various places of these messages I have to insert parameters to "customize" them. I guess you know what I mean ;) My question probably falls into the "Which is the best style to do it?" category: How would you store these parameters (they may be Strings and Numbers that need to be formatted according to Locale) in the database? I'm using Hibernate to do the ORM and I can think of the following solutions: build a combined String and save it as such (ugly and hard to maintain I think) do some kind of fancy normalization and and make every parameter a single row on the database (clean I guess, but a performance nightmare) Put the params into an Array, Map or other Java data structure and save it in binary format (probably causes a lot of overhead size-wise) I tend towards option #3 but I'm afraid that it might be to costly in terms of size in the database. What do you think?

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  • fancybox image sometimes renders outside box

    - by Colleen
    I have the following django template: <script type="text/javascript" src="{{ STATIC_URL }}js/ jquery.fancybox-1.3.4.pack.js"></script> <link rel="stylesheet" href="{{ STATIC_URL }}css/ jquery.fancybox-1.3.4.css" type="text/css" media="screen" /> {% include "submission-form.html" with section="photos" %} <div class="commentables"> {% load thumbnail %} {% for story in objects %} <div class="image {% if forloop.counter|add:"-1"| divisibleby:picsinrow %}left{% else %}{% if forloop.counter| divisibleby:picsinrow %}right{% else %}middle{% endif %}{% endif %}"> {% if story.image %} {% thumbnail story.image size crop="center" as full_im %} <a rel="gallery" href="{% url post slug=story.slug %}"> <img class="preview" {% if story.title %} alt="{{ story.title }}" {% endif %} src="{{ full_im.url }}" full- image="{% if story.image_url %}{{ story.image_url }}{% else %} {{ story.image.url }}{% endif %}"> </a> {% endthumbnail %} {% else %} {% if story.image_url %} {% thumbnail story.image_url size crop="center" as full_im %} <a rel="gallery" href="{% url post slug=story.slug %}"> <img class="preview" {% if story.title %} alt="{{ story.title }}" {% endif %} src="{{ full_im.url }}" full- image="{{ story.image_url }}"> </a> {% endthumbnail %} {% endif %} {% endif %} </div> {% endfor %} {% if rowid != "last" %} <br style="clear: both" /> {% endif %} {% if not no_more_button %} <p style="text-align: right;" class="more-results"><a href="{% url images school_slug tag_slug %}">more...</a></p> {% endif %} </div> <script> $(document).ready(function(){ function changeattr(e){ var f = $(e.clone()); $(f.children()[0]).attr('src', $(f.children() [0]).attr("full-image")); $(f.children()[0]).attr('height', '500px'); return f[0].outerHTML; } $('.image a').each(function(idx, elem) { var e = $(elem); e.fancybox({ title: $(e.children()[0]).attr('alt'), content: changeattr(e) }); }); }); </script> and I'm occasionally getting weird display errors where the box will either not render anything at all (so it will show up as just a thin white bar, basically) or it will render only about 30 px wide, and position itself halfway down the page. In both cases, if I inspect element, I can see the "shadow" of the full picture, at the right size, with the right url. Image source doesnt' seem to make a difference, I'm getting no errors, and this is happening in both chrome and firefox. Does anyone have any ideas?

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  • BufferedReader no longer buffering after a while?

    - by BobTurbo
    Sorry I can't post code but I have a bufferedreader with 50000000 bytes set as the buffer size. It works as you would expect for half an hour, the HDD light flashing every two minutes or so, reading in the big chunk of data, and then going quiet again as the CPU processes it. But after about half an hour (this is a very big file), the HDD starts thrashing as if it is reading one byte at a time. It is still in the same loop and I think I checked free ram to rule out swapping (heap size is default). Probably won't get any helpful answers, but worth a try. OK I have changed heap size to 768mb and still nothing. There is plenty of free memory and java.exe is only using about 300mb. Now I have profiled it and heap stays at about 200MB, well below what is available. CPU stays at 50%. Yet the HDD starts thrashing like crazy. I have.. no idea. I am going to rewrite the whole thing in c#, that is my solution. Here is the code (it is just a throw-away script, not pretty): BufferedReader s = null; HashMap<String, Integer> allWords = new HashMap<String, Integer>(); HashSet<String> pageWords = new HashSet<String>(); long[] pageCount = new long[78592]; long pages = 0; Scanner wordFile = new Scanner(new BufferedReader(new FileReader("allWords.txt"))); while (wordFile.hasNext()) { allWords.put(wordFile.next(), Integer.parseInt(wordFile.next())); } s = new BufferedReader(new FileReader("wikipedia/enwiki-latest-pages-articles.xml"), 50000000); StringBuilder words = new StringBuilder(); String nextLine = null; while ((nextLine = s.readLine()) != null) { if (a.matcher(nextLine).matches()) { continue; } else if (b.matcher(nextLine).matches()) { continue; } else if (c.matcher(nextLine).matches()) { continue; } else if (d.matcher(nextLine).matches()) { nextLine = s.readLine(); if (e.matcher(nextLine).matches()) { if (f.matcher(s.readLine()).matches()) { pageWords.addAll(Arrays.asList(words.toString().toLowerCase().split("[^a-zA-Z]"))); words.setLength(0); pages++; for (String word : pageWords) { if (allWords.containsKey(word)) { pageCount[allWords.get(word)]++; } else if (!word.isEmpty() && allWords.containsKey(word.substring(0, word.length() - 1))) { pageCount[allWords.get(word.substring(0, word.length() - 1))]++; } } pageWords.clear(); } } } else if (g.matcher(nextLine).matches()) { continue; } words.append(nextLine); words.append(" "); }

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  • Crop & Resize Images in Wordpress

    - by Thomas
    I have gone through several plugins and I can't find a plugin that simply resizes and crops images to a specific size when they get uploaded. This is different from simply resizing one side of the image, I need it to resize the smallest side and then crop the largest side so that the image fits in a specific space. WP already does this by default with thumbnails but I need to do this with full-sized images as well. I was going to use: http://wordpress.org/extend/plugins/scissors/ but it doesn't work with my installation. Can anyone think of another plugin that does this? Is there a simple way to enable this behavior for full size images by modifying wordpress?

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  • Can I redefine an XML element definition?

    - by joe
    For example, I would like to include <feetFromWater> in my <house> element. But here is the catch... I would like to keep the element name <house> and I do not want to modify the original definition. FILE: baseProperty.mod <!ELEMENT house (%size;%stories;)> <!ATTLIST house %univ-atts; outputclass CDATA #IMPLIED > FILE: beachHouse.mod (This file references baseProperty.mod) <!ELEMENT beachHouse (%size;%stories;%feetFromWater)> <!ATTLIST beachHouse %univ-atts; outputclass CDATA #IMPLIED > Is there a way to do the following without renaming from <house> to <beachHouse>?

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  • use MACRO __FUNCTION__ with inline function

    - by Kurzack
    Hi all, I want to add debug message in kmalloc function in linux kernel. So my goal is to print all functions that call kmalloc. I tried to add printk("caller : %s size : %d",FUNCTION, size); in kmalloc function in slab.h but, the result of FUNCTION is kmalloc itself. I realised that MACRO is processed first before inline function (fyi, kmalloc is an inline function). Now, my question is, what is the simplest way to add debug message to kmalloc? Thanks in advance guys.

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  • How to find out the dimensionality of print paper in javascript

    - by tzador
    I am generating reports in HTML formats, and want to print them automatically using Qt (qt has a webkit based browser, and one can render its contents to a PDF file). I want to position the elements of the report depending on the target page size. For that i need to access the size of the paper (preferably in pixels). Since i am using webkit, it has all the latest html5 and css3 features. is there some api available to access printed page properties inside javascript. for example, would be nice to write: window.print_paper.width or window.print_paper.height Thank you in advance

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  • ASP.Net MVC + Live validation - how come the flagged text are all over the place?

    - by melaos
    hi guys, this is an asp.net mvc project and <% using (Html.BeginForm("ProductAdded", "Home")) { % Register Your Product <%= ViewData["MainHeader"]% <p><%=ViewData["IntroText"]%></p> <div style="display: none;"> <div id="regionThreePane"> <table border="0" cellpadding="0" cellspacing="0" frame="void" style="width: 100%"> <tr> <td width='250px'><select name="ProdLBox1" id="ProdLBox1" class="ProdLBox1" size="8"></select></td> <td width='250px'><select name="ProdLBox2" id="ProdLBox2" class="ProdLBox2" size="8"></select></td> <td width='250px'><select name="ProdLBox3" id="ProdLBox3" class="ProdLBox3" size="8"></select></td> </tr> </table> </div> i'm using live validation for my client side validation. var v_fname = new LiveValidation('Customer_FirstName', { validMessage: " " }, { onlyOnSubmit: true }); v_fname.add(Validate.Presence, { failureMessage: enterfirstname}); var v_lname = new LiveValidation('Customer_LastName', { validMessage: " " }); v_lname.add(Validate.Presence, { failureMessage: enterlastname }); var v_email = new LiveValidation('Customer_Email', { validMessage: " " }); v_email.add(Validate.Presence, { failureMessage: enteremail, validMessage: " " }); v_email.add(Validate.Email, { failureMessage: entervalidemail}); and what i notice is that after doing some button call: $(".btnAddProduct").click(function() { //Check first to see if there's anything to be added if (parseFloat($(".tboAddProduct").val()) < 1) { //TO DO: to replace with localized text var selectProductError = "Please select a product first"; $("#validationSummary").text(selectProductError); //alert("Please select a product first"); return false; } $(".PanelProductReg").show(); addProductRow($(".tboAddProductId").val(), $("#tboAddProduct").val()); }); what will happen is that the validation tags will start to appear for the whole page for all the input which are tag for the live validation. instead of just appearing when the controls are being higlighted and onblur. i'm using some ajax calls to get data and a lot of jquery to dynamically do the gui stuff. could any of this be causing some sort of an internal conflict? thanks

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  • What data structure would be the least painful DataTable replacement?

    - by MatthewMartin
    I'm storing a lot of sorted ~10 row 2 column/key value pairs in ASP.NET cache-- they're the data for dropdownlists. Right now they are all DataTables, which isn't very space efficient (the rule of thumb is 10x increase in size when data is strored in a dataset). Old Code DataTable table = dataAccess.GetDataTable(); dropDownList.DataSource = table; Hoped for new Code Unknown data = dataAccess.GetSomethingMoreSpaceEfficient(); dropDownList.DataSource = data; What pre-existing datastructures are similar enough to DataTable that would minimize code breakage and reduce the serialized size when stored in ASP.NET cache?

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  • CGAffineTransformMakeRotation goes the other way after 180 degrees (-3.14)

    - by TheKillerDev
    So, i am trying to do a very simple disc rotation (2d), according to the user touch on it, just like a DJ or something. It is working, but there is a problem, after certain amount of rotation, it starts going backwards, this amount is after 180 degrees or as i saw in while logging the angle, -3.14 (pi). I was wondering, how can i achieve a infinite loop, i mean, the user can keep rotating and rotating to any side, just sliding his finger? Also a second question is, is there any way to speed up the rotation? Here is my code right now: #import <UIKit/UIKit.h> @interface Draggable : UIImageView { CGPoint firstLoc; UILabel * fred; double angle; } @property (assign) CGPoint firstLoc; @property (retain) UILabel * fred; @end @implementation Draggable @synthesize fred, firstLoc; - (id)initWithFrame:(CGRect)frame { self = [super initWithFrame:frame]; angle = 0; if (self) { // Initialization code } return self; } -(void)handleObject:(NSSet *)touches withEvent:(UIEvent *)event isLast:(BOOL)lst { UITouch *touch =[[[event allTouches] allObjects] lastObject]; CGPoint curLoc = [touch locationInView:self]; float fromAngle = atan2( firstLoc.y-self.center.y, firstLoc.x-self.center.x ); float toAngle = atan2( curLoc.y-(self.center.y+10), curLoc.x-(self.center.x+10)); float newAngle = angle + (toAngle - fromAngle); NSLog(@"%f",newAngle); CGAffineTransform cgaRotate = CGAffineTransformMakeRotation(newAngle); self.transform = cgaRotate; if (lst) angle = newAngle; } -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { UITouch *touch =[[[event allTouches] allObjects] lastObject]; firstLoc = [touch locationInView:self]; }; -(void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { [self handleObject:touches withEvent:event isLast:NO]; }; -(void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { [self handleObject:touches withEvent:event isLast:YES]; } @end And in the ViewController: UIImage *tmpImage = [UIImage imageNamed:@"theDisc.png"]; CGRect cellRectangle; cellRectangle = CGRectMake(-1,self.view.frame.size.height,tmpImage.size.width ,tmpImage.size.height ); dragger = [[Draggable alloc] initWithFrame:cellRectangle]; [dragger setImage:tmpImage]; [dragger setUserInteractionEnabled:YES]; dragger.layer.anchorPoint = CGPointMake(.5,.5); [self.view addSubview:dragger]; I am open to new/cleaner/more correct ways of doing this too. Thanks in advance.

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  • JProgressBar.stringPainted(true); is not working

    - by Mirza Ghalib
    This is a part of my java code, in this code I have written that when I click the button the value of JProgressBar should becomes 0 and stringPainted(); becomes true, but "string painted" is not visible when I click the button, please help. import java.awt.Color; import java.awt.Dimension; import java.awt.FlowLayout; import java.awt.Graphics; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JProgressBar; public class R implements ActionListener { static int y; CustomProgressBar b = new CustomProgressBar(); public static void main(String arg[]) throws Exception { new R(); } public R() throws Exception { JFrame f = new JFrame(); JButton btn = new JButton("Click"); f.setExtendedState(JFrame.MAXIMIZED_BOTH); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.setUndecorated(true); f.setLayout(new FlowLayout()); btn.addActionListener(this); f.add(b); f.add(btn); f.setVisible(true); } class CustomProgressBar extends JProgressBar{ private static final long serialVersionUID = 1L; private boolean isStringToBePainted = false; public CustomProgressBar() { super(JProgressBar.VERTICAL,0,100); } @Override protected void paintComponent(Graphics g) { super.paintComponent(g); if(isStringToBePainted ) { Dimension size = CustomProgressBar.this.getSize(); if( CustomProgressBar.this.getPercentComplete()<0.9 ) R.y = (int)( size.height - size.height * CustomProgressBar.this.getPercentComplete() ); String text = getString(); g.setColor(Color.BLACK ); g.drawString(text, 0, R.y); } } @Override public void setStringPainted(boolean b) { isStringToBePainted=b; } } @Override public void actionPerformed(ActionEvent e) { b.setValue(0); b.setStringPainted(true); } }

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  • Two collections and a for loop. (Urgent help needed) Checking an object variable against an inputted

    - by Elliott
    Hi there, I'm relatively new to java, I'm certain the error is trivial. But can't for the life of me spot it. I have an end of term exam on monday and currently trying to get to grips with past papers! Anyway heregoes, in another method (ALGO_1) I search over elements of and check the value H_NAME equals a value entered in the main. When I attempt to run the code I get a null pointer exception, also upon trying to print (with System.out.println etc) the H_NAME value after each for loop in the snippet I also get a null statement returned to me. I am fairly certain that the collection is simply not storing the data gathered up by the Scanner. But then again when I check the collection size with size() it is about the right size. Either way I'm pretty lost and would appreciate the help. Main questions I guess to ask are: from the readBackground method is the data.add in the wrong place? is the snippet simply structured wrongly? oh and another point when I use System.out.println to check the Background object values name, starttime, increment etc they print out fine. Thanks in advance.(PS im guessing the formatting is terrible, apologies.) snippet of code: for(Hydro hd: hydros){ System.out.println(hd.H_NAME); for(Background back : backgs){ System.out.println(back.H_NAME); if(back.H_NAME.equals(hydroName)){ //get error here public static Collection<Background> readBackground(String url) throws IOException { URL u = new URL(url); InputStream is = u.openStream(); InputStreamReader isr = new InputStreamReader(is); BufferedReader b = new BufferedReader(isr); String line =""; Vector<Background> data = new Vector<Background>(); while((line = b.readLine())!= null){ Scanner s = new Scanner(line); String name = s.next(); double starttime = Double.parseDouble(s.next()); double increment = Double.parseDouble(s.next()); double sum = 0; double p = 0; double nterms = 0; while((s.hasNextDouble())){ p = Double.parseDouble(s.next()); nterms++; sum += p; } double pbmean = sum/nterms; Background SAMP = new Background(name, starttime, increment, pbmean); data.add(SAMP); } return data; } Edit/Delete Message

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  • Uniform distribution of binary values in Matlab

    - by JohnIdol
    I have a requirement for the generation of a given number N of vectors of given size each consistent of a uniform distribution of 0s and 1s. This is what I am doing at the moment, but I noticed that the distribution is strongly peaked at half 1s and half 0s, which is no good for what I am doing: a = randint(1, sizeOfVector, [0 1]); The unifrnd function looks promising for what I need, but I can't manage to understand how to output a binary vector of that size. Is it the case that I can use the unifrnd function (and if so how would be appreciated!) or can is there any other more convenient way to obtain such a set of vectors? Any help appreciated!

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  • Android use of an string array on another method

    - by spagi
    Hi all. Im trying to make an activity that has a multiple choice dialog after you push a button. In there you select from a list of things. But these things are received from a web method before the dialog appears. So I create a string array after I receive them inside the onCreate to initialise it there with the correct size. But my dialog method then cant get the array because propably its out of its scope. My code looks like this @Override protected Dialog onCreateDialog(int id) //Here is where the array is loaded to the multiple select dialog etc @Override public void onCreate(Bundle savedInstanceState) //Here is where i initialise the array and get its contents etc I cant initialise my array when the class starts because I dont know its size yet. This has to do something with the scopes of my variables and I am pretty confused

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  • How do you make your Java application memory efficient?

    - by Boune
    How do you optimize the heap size usage of an application that has a lot (millions) of long-lived objects? (big cache, loading lots of records from a db) Use the right data type Avoid java.lang.String to represent other data types Avoid duplicated objects Use enums if the values are known in advance Use object pools String.intern() (good idea?) Load/keep only the objects you need I am looking for general programming or Java specific answers. No funky compiler switch. Edit: Optimize the memory representation of a POJO that can appear millions of times in the heap. Use cases Load a huge csv file in memory (converted into POJOs) Use hibernate to retrieve million of records from a database Resume of answers: Use flyweight pattern Copy on write Instead of loading 10M objects with 3 properties, is it more efficient to have 3 arrays (or other data structure) of size 10M? (Could be a pain to manipulate data but if you are really short on memory...)

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  • unable to calculate textfield values

    - by user1726508
    i am trying to change the input field when users changes the quantity of items in a text field. Here i am iterating my list from my database. Now i have to make invoice for customer. In my code , if i am changing quantity of a single item, then it is effecting all the other items in the list. I want to change only to the specific items,where its quantity has been change. Below code is giving me error. It is changing all the items value on single change of item quantity. my code; <script type="text/javascript"> $(document).ready(function(){ $(function() { $('input[name="quantity"]').change(function() { var unitprice = $('input[name^="unitprice"]').val(); $(this).parents('tr').find('input[name^="price"]').val($(this).val() * unitprice); }); }); }); </script> <tr> <td height="65%" valign="top" width="100%"> <table width="100%" height="100%" border="0" cellpadding="0" cellspacing="0"> <s:iterator value="#session.BOK" status="userStatus"> <tr style="height: 10px;"> <td width="65%" align="left"><s:property value="bookTitile"/></td> <td width="10%" align="left"><s:textfield name="unitprice" value="%{price}" size="4"/></td> <td width="10%" align="center"><s:textfield name="quantity" value="%{quantity}" size="2"/></td> <td width="15%" align="center"><s:textfield name="price" size="6"></s:textfield> </td> </tr> </s:iterator> </table> </td> </tr> output looks like this image...

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  • Javascript to sort contents of select element

    - by Jangwenyi
    Hi, is there a quick way to sort the items of a select element? Or I have to resort to writing javascript? Please any ideas. <select size="4" name="lstALL" multiple="multiple" id="lstALL" tabindex="12" style="font-size:XX-Small;height:95%;width:100%;"> <option value="0"> XXX</option> <option value="1203">ABC</option> <option value="1013">MMM</option> </select>

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  • why arrayfun does NOT improve my struct array operation performance

    - by HaveF
    here is the input data: % @param Landmarks: % Landmarks should be 1*m struct. % m is the number of training set. % Landmark(i).data is a n*2 matrix old function: function Landmarks=CenterOfGravity(Landmarks) % align center of gravity for i=1 : length(Landmarks) Landmarks(i).data=Landmarks(i).data - ones(size(Landmarks(i).data,1),1)... *mean(Landmarks(i).data); end end new function which use arrayfun: function [Landmarks] = center_to_gravity(Landmarks) Landmarks = arrayfun(@(struct_data)... struct('data', struct_data.data - repmat(mean(struct_data.data), [size(struct_data.data, 1), 1]))... ,Landmarks); end %function center_to_gravity when using profiler, I find the usage of time is NOT what I expected: Function Total Time Self Time* CenterOfGravity 0.011s 0.004 s center_to_gravity 0.029s 0.001 s Can someone tell me why? BTW...I can't add "arrayfun" as a new tag for my reputation.

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  • Syncing large personal school-material -git-repo with things such as casual notes? Rsync, wget and Git -- or some ready tool?

    - by hhh
    My friend wants to store electrically her school -notes and process them fast, with backups. She has over 2GB -size repo already and growing all the time (mostly appended material i.e. more school notes, different formats, pdf, pictures and scanned, some text -files, etc). The goal of my friend is to process fast the notes. I suggested command like this here i.e. "# crontab -e @weekly wget --random-wait -e robots=off -U mozilla -mirror http://VeryLong.com". But I think plugging in Rsync somewhere could make it much better with Git. How would you help my friend to process and store the school -material under Git-version-controlling and still keep the size reasonable? Perhaps related rsync .git directory rsync git big repository Different scope Git/rsync mix for projects with large binaries and text files What's a good way to organize a large collection of personal scripts using git?

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  • Wordpress plugin $post

    - by Jordan Pagaduan
    I have already get how to insert in the database. My only problem is to get the value of text box to insert in the database. Here is my code: function dbAdd() { global $wpdb; $new_title = $_POST['new_title']; $new_author = $_POST['new_author']; $new_url = $_POST['new_url']; if($wpdb->insert('wp_podcast_data', array( 'mp3_id' => '', 'title' => '$new_title', 'creator' => '$new_author', 'url' => '$new_url') )) { echo"<h1>Save Successfully!</h1>"; }else { echo mysql_error(); } } ---------------------------------------------------------- function player_manager_index() { if($_SERVER['REQUEST_METHOD']=='POST') { dbAdd(); } ?> <h3>Podcast Player Manager (This Plug is not yet finish)</h3><br /> <p>Note: This Player Manager needs the URL of mp3 file that you want to include in your podcast player.</p> <form method="post" action=""> <label for="new_title" style="display:block; padding-top: 5px; cursor: default;">Title</label><input type="text" id="new_title" name="new_title" size="50" /> <label for="new_author" style="display:block; padding-top: 5px; cursor: default;">Author</label><input type="text" id="new_author" name="new_author" size="50" /> <label for="new_url" style="display:block; padding-top: 5px; cursor: default;">URL</label><input type="text" id="new_url" name="new_url" size="50" /> <div><input type="submit" value="Add New" style="margin-left: 20px; margin-top: 15px;" /></div> </form> Please Help me. I'm newbie in wordpress. Thank you so much.

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  • At the download of a file: does it make sense to check the filesize?

    - by sid_com
    Does the test of the file-size make sense here? I tried to cut the connection while downloading, but it looks like the size-test is never reached. #!/usr/bin/env perl use warnings; use strict; use 5.012; use LWP::Simple; my $file_size = '2342'; my $response = getstore( 'url', 'filename' ); if ( is_success $response ) { if ( $file_size == -s 'filename' ) { say "OK"; } }

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  • Same loop giving different output. Java IO

    - by Nitesh Panchal
    Hi, I am facing a very strange problem where the same loop keeps giving me different different output on change of value of BUFFER final int BUFFER = 100; char[] charArr = new char[BUFFER]; StringBuffer objStringBuffer = new StringBuffer(); while (objBufferedReader.read(charArr, 0,BUFFER) != -1) { objStringBuffer.append(charArr); } objFileWriter.write(objStringBuffer.toString()); When i change BUFFER size to 500 it gives me a file of 7 kb when i change BUFFER size to 100000 it gives a file of 400 kb where the contents are repeated again and again. Please help. What should i do to prevent this?

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  • UIGraphicsBeginImageContext question in Objective C

    - by Henry D'Andrea
    I need the UIGraphicsBeginImageContext(self.view.frame.size); changed to where the .frame part pulls from webView - (void) save { UIGraphicsBeginImageContext(self.view.frame.size); [self.view.layer renderInContext:UIGraphicsGetCurrentContext()]; UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil); NSLog(@"TEST"); } WEBVIEW CODE: -(BOOL) webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)ntype { NSLog(@"Scheme: %@", request.URL.scheme); if ([request.URL.scheme isEqualToString:@"save"]) { [self save]; } return true; }

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  • Can MySQL reasonably perform queries on billions of rows?

    - by haxney
    I am planning on storing scans from a mass spectrometer in a MySQL database and would like to know whether storing and analyzing this amount of data is remotely feasible. I know performance varies wildly depending on the environment, but I'm looking for the rough order of magnitude: will queries take 5 days or 5 milliseconds? Input format Each input file contains a single run of the spectrometer; each run is comprised of a set of scans, and each scan has an ordered array of datapoints. There is a bit of metadata, but the majority of the file is comprised of arrays 32- or 64-bit ints or floats. Host system |----------------+-------------------------------| | OS | Windows 2008 64-bit | | MySQL version | 5.5.24 (x86_64) | | CPU | 2x Xeon E5420 (8 cores total) | | RAM | 8GB | | SSD filesystem | 500 GiB | | HDD RAID | 12 TiB | |----------------+-------------------------------| There are some other services running on the server using negligible processor time. File statistics |------------------+--------------| | number of files | ~16,000 | | total size | 1.3 TiB | | min size | 0 bytes | | max size | 12 GiB | | mean | 800 MiB | | median | 500 MiB | | total datapoints | ~200 billion | |------------------+--------------| The total number of datapoints is a very rough estimate. Proposed schema I'm planning on doing things "right" (i.e. normalizing the data like crazy) and so would have a runs table, a spectra table with a foreign key to runs, and a datapoints table with a foreign key to spectra. The 200 Billion datapoint question I am going to be analyzing across multiple spectra and possibly even multiple runs, resulting in queries which could touch millions of rows. Assuming I index everything properly (which is a topic for another question) and am not trying to shuffle hundreds of MiB across the network, is it remotely plausible for MySQL to handle this? UPDATE: additional info The scan data will be coming from files in the XML-based mzML format. The meat of this format is in the <binaryDataArrayList> elements where the data is stored. Each scan produces = 2 <binaryDataArray> elements which, taken together, form a 2-dimensional (or more) array of the form [[123.456, 234.567, ...], ...]. These data are write-once, so update performance and transaction safety are not concerns. My naïve plan for a database schema is: runs table | column name | type | |-------------+-------------| | id | PRIMARY KEY | | start_time | TIMESTAMP | | name | VARCHAR | |-------------+-------------| spectra table | column name | type | |----------------+-------------| | id | PRIMARY KEY | | name | VARCHAR | | index | INT | | spectrum_type | INT | | representation | INT | | run_id | FOREIGN KEY | |----------------+-------------| datapoints table | column name | type | |-------------+-------------| | id | PRIMARY KEY | | spectrum_id | FOREIGN KEY | | mz | DOUBLE | | num_counts | DOUBLE | | index | INT | |-------------+-------------| Is this reasonable?

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