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  • Generate Color Gradient in C#

    - by Ngu Soon Hui
    My question here is similar to the question here, except that I am working with C#. I have two colors, and I have a predefine steps. How to retrieve a list of Colors that are the gradients between the two? This is an approach that I tried, which didn't work: int argbMax = Color.Chocolate.ToArgb(); int argbMin = Color.Blue.ToArgb(); var colorList = new List<Color>(); for(int i=0; i<size; i++) { var colorAverage= argbMin + (int)((argbMax - argbMin) *i/size); colorList.Add(Color.FromArgb(colorAverage)); } If you try the above code, you will find that a gradual increase in argb doesn't correspond to a visual gradual increase in the color. Any idea on this?

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  • Load large images into Bitmap?

    - by GuyNoir
    I'm trying to make a basic application that displays an image from the camera, but I when I try to load the .jpg in from the sdcard with BitmapFactory.decodeFile, it returns null. It doesn't give an out of memory error which I find strange, but the exact same code works fine on smaller images. How does the generic gallery display huge pictures from the camera with so little memory?

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  • How to generate unique number of 12 digits?

    - by DanSogaard
    I'm working on an app that sends raw data to zebra printer and print out barcodes. And since every item has its own unique barcode, I need to define a variable that automatically generates unique number of 12 digits long. see example: printBar prnt = new printBar("123456789012"); Is there anyway to define a double variable and pass it to a function that return uniqely 12 digits number and pass it over again to the printBar class?. But how to make sure everytime you access it returns a unique value?. I also thought of another way, since am using MS Access db, I can create a column of AutoNumber datatype and assign it to Random, but you don't get the exact 12 digits required, sometimes it generates a value of 10 digits sometimes more or less.

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  • Reverse regular expressions to generate data

    - by Anton Gogolev
    In one of the StackOverflow Podcasts (the one where guys were discussing data generation for testing DBs -- either #11 or #12), Jeff mentioned something like "reverse regular expressions", which are used exactly for that purpose: given a regex, produce a string which will eventually match said regex. What is the correct term for this whole concept? Is this a well-known concept?

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  • Free library to generate excel chart in .NET

    - by SchmerZ
    Hi to all. I need a free library (or not too expensive) for .NET to work with the excel document. I need to read data, modify, save and add charts into the document. Or in another way, I need a free library for creating and inserting charts into the excel document (only for charts). I have found FlexCel and SmartXLS, but FlexCel doesn't support the charts (can't create), while SmartXLS has a small functionality. Thanks for any help.

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  • Seamlessly use large background images on webpages

    - by Ben Shelock
    I want to have huge background images on my site but without giving the user a hard time downloading them and the site looking ugly as the background loads. They would be no bigger than 1920 X 1080 in size, however it's hard to say in terms of kilobytes/megabytes. What are my options here and which are most effective? I'm not too bothered about bandwidth, just want to user to think everything looks nice ;)

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  • java servlet: generate zip file from BLOBs

    - by Zack
    I'm trying to zip a large number of pdf files (stored as BLOBs in the DB) and then return the zip as an attachment to the user. What's the best way to do this without running into memory issues? Another note: I actually need to merge some PDFs prior to adding them to the ZipOutputStream. Therefore, a couple PDFs will need to be stored in memory at a time. I assume it would be best to then store them as temporary files on the server before zipping them all?

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  • Using a password to generate two distinct hashes without reducing password security

    - by Nevins
    Hi there, I'm in the process of designing a web application that will require the storage of GPG keys in an encrypted format in a database. I'm planning on storing the user's password in a bCrypt hash in the database. What I would like to be able to do is to use that bCrypt to authenticate the user then use the combination of the stored bCrypt hash and another hash of the password to encrypt and decrypt the GPG keys. My question is whether I can do this without reducing the security of the password? I was thinking I may be able to use something like an HMAC-SHA256 of a static string using the password and a salt as the secret key. Is there a better way to do this that I haven't thought of? Thanks

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  • webscraper grabbing images, but not entering info into database

    - by Jason
    Hello, again. I'm having more issues with my script entering info into my database. The script below grabs a page, strips down the necessary info, then downloads the related image file. After that, it is supposed to enter the information gleaned from the URL into the database. For some reason, the script seems to iterate through the URLs, as I get downloaded images for each URL, but each URL's product is not entered into the database. The script will insert the first product's categories and product info, and then it just stops, and continues to download images. Any suggestions? <?php define('IN_PHPBB', true); $phpbb_root_path = (defined('PHPBB_ROOT_PATH')) ? PHPBB_ROOT_PATH : './'; $phpEx = substr(strrchr(__FILE__, '.'), 1); include($phpbb_root_path . 'common.' . $phpEx); include($phpbb_root_path . 'includes/simple_html_dom.' . $phpEx); // Start session management $user->session_begin(); $auth->acl($user->data); $user->setup(); set_time_limit(259200); function save($in, $out) { $ch = curl_init ($in); curl_setopt($ch, CURLOPT_HEADER, 0); curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt($ch, CURLOPT_BINARYTRANSFER,1); $rawdata=curl_exec($ch); curl_close ($ch); if(file_exists($out)) { unlink($out); } $fp = fopen($out,'x'); fwrite($fp, $rawdata); fclose($fp); } function scrape($i) { $url = 'http:/xxxxxxxx/index.php?main_page=product_info&products_id='.$i.'&zenid=e4b7dde8de02e1df005d4549e2e3e529'; echo "$url -- "; $exists = file_get_contents($url); if ($exists != false) { $html = file_get_html($url); foreach($html->find('body') as $html) { $test = $html->find('#productName', 0); if ($test) { $item['title'] = trim($html->find('#productName', 0)->plaintext); $item['price'] = trim($html->find('#productPrices', 0)->plaintext); $item['cat'] = $html->find('#navBreadCrumb', 0)->plaintext; list($home, $item['cat'], $item['subcat'], $title) = explode("::", $item['cat']); $item['cat'] = str_replace("&nbsp;", "", $item['cat']); $item['subcat'] = str_replace("\n", "", str_replace("&nbsp;", "", $item['subcat'])); $item['desc'] = trim($html->find('#productDescription', 0)->plaintext); $item['model'] = $html->find('ul#productDetailsList', 0)->find('li', 0)->plaintext; $item['model'] = explode(":", $item['model']); $item['model'] = trim($item['model'][1]); $item['manufacturer'] = $html->find('ul#productDetailsList', 0)->find('li', 1)->plaintext; $item['manufacturer'] = explode(":", $item['manufacturer']); $item['manufacturer'] = trim($item['manufacturer'][1]); foreach($html->find('img') as $img) { if($img->alt == $item['title']) { $item['img_sm'] = $img->src; } } $ret[] = $item; } } $html->clear(); unset($html); unset($item); return $ret; } else { echo "Could not find page<br />"; } unset($exists); } $i = 1; $end = 9999999; while($i < $end) { $ret = scrape($i); if(isset($ret)) { foreach($ret as $v) { $item['title'] = $v['title']; $item['price'] = $v['price']; $item['desc'] = $v['desc']; $item['model'] = $v['model']; $item['manufacturer'] = $v['manufacturer']; $item['image'] = $v['image']; $item['cat'] = $v['cat']; $item['subcat'] = $v['subcat']; $item['img_sm'] = $v['img_sm']; } unset($ret); unset($v); $sm_img_src = "http://xxxxxx/".$item['img_sm']; $ext = strrchr($item['img_sm'], '.'); $filename = $item['model'] . $ext; $lg_img_src = "http://xxxxx/images/STC/".$filename; $new_sm = "./rip_images/small/{$filename}"; $new_lg = "./rip_images/large/{$filename}"; $item['image'] = $filename; save($lg_img_src,$new_lg); save($sm_img_src,$new_sm); //see if parent cat exists $sql = 'SELECT cat_id FROM ' . SHOP_CAT_TABLE . ' WHERE cat_name = "'.$db->sql_escape($item['cat']).'"'; $result = $db->sql_query($sql); $parent = $db->sql_fetchrow($result); $db->sql_freeresult($result); // if not exists if($parent['cat_id'] == '') { //add the parent cat to the db $sql_ary = array( 'cat_name' => $item['cat'], 'cat_parent' => 0 ); $sql = 'INSERT INTO '.SHOP_CAT_TABLE.' '.$db->sql_build_array('INSERT', $sql_ary); $db->sql_query($sql); $cat_id = $db->sql_nextid(); //see if subcat exists $sql = 'SELECT cat_id FROM ' . SHOP_CAT_TABLE . ' WHERE cat_name = "'.$db->sql_escape($item['subcat']).'"'; $result = $db->sql_query($sql); $row = $db->sql_fetchrow($result); $db->sql_freeresult($result); // if not exists if($row['cat_id'] == '') { //add subcat to db $sql_ary = array( 'cat_name' => $db->sql_escape($item['subcat']), 'cat_parent' => $cat_id ); $sql = 'INSERT INTO '.SHOP_CAT_TABLE.' '.$db->sql_build_array('INSERT', $sql_ary); $db->sql_query($sql); $item_cat = $db->sql_nextid(); } else //if exists { $item_cat = $row['cat_id']; } } else //if parent cat exists { //see if subcat exists $sql = 'SELECT cat_id FROM ' . SHOP_CAT_TABLE . ' WHERE cat_name = "'.$db->sql_escape($item['subcat']).'"'; $result = $db->sql_query($sql); $row = $db->sql_fetchrow($result); $db->sql_freeresult($result); // if not exists if($row['cat_id'] == '') { //add the subcat to the db $sql_ary = array( 'cat_name' => $db->sql_escape($item['subcat']), 'cat_parent' => $parent['cat_id'] ); $sql = 'INSERT INTO '.SHOP_CAT_TABLE.' '.$db->sql_build_array('INSERT', $sql_ary); $db->sql_query($sql); $item_cat = $db->sql_nextid(); } else //if exists { $item_cat = $row['cat_id']; } } $sql_ary = array( 'item_title' => $db->sql_escape($item['title']), 'item_price' => $db->sql_escape($item['price']), 'item_desc' => $db->sql_escape($item['desc']), 'item_model' => $db->sql_escape($item['model']), 'item_manufacturer' => $db->sql_escape($item['manufacturer']), 'item_image' => $db->sql_escape($item['image']), 'item_cat' => $db->sql_escape($item_cat) ); $sql = 'INSERT INTO ' . SHOP_ITEM_TABLE . ' ' . $db->sql_build_array('INSERT', $sql_ary); $db->sql_query($sql); garbage_collection(); echo 'Done<br />'; } $i++; unset($item); } ?>

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  • Why does this code generate an error? [closed]

    - by user559601
    <link rel="search" type="application/opensearchdescription+xml" href="http://b.static.ak.fbcdn.net/rsrc.php/yJ/r/H2SSvhJMJA-.xml" title="" /> <link rel="shortcut icon" href="http://static.ak.fbcdn.net/rsrc.php/y7/r/5875srnzL-I.ico" /></head> <body class="WelcomePage UIPage_LoggedOut mac Locale_en_US"> <div id="FB_HiddenContainer" style="position:absolute; top:-10000px; width:0px; height:0px;" ></div> <div id="blueBar" class="loggedOut"></div> <div id="globalContainer"><div id="dialogContainer"></div><div id="dropmenu_container"></div> <div id="content" class="fb_content clearfix"><div ><!-- 2365fa3194ecdc0cab15721ce967a9f8663937c7 --> <div class="WelcomePage_Container"><div class="loggedout_menubar_container"><div class="clearfix loggedout_menubar"><a class="lfloat" href="/" title="Go to Home"><img class="fb_logo img" src="http://static.ak.fbcdn.net/rsrc.php/yp/r/kk8dc2UJYJ4.png" alt="Facebook logo" width="170" height="36" /></a><div class="rfloat"><div class="menu_login_container"><form method="POST" action="https://login.facebook.com/login.php?login_attempt=1" id="login_form" onsubmit="return Event.__inlineSubmit(this,event)"><input type="hidden" name="charset_test" value="&euro;,&acute;,€,´,?,?,?" /><input type="hidden" name="lsd" value="hEICz" autocomplete="off" /><input type="hidden" id="locale" name="locale" value="en_US" autocomplete="off" /><table cellspacing="0"><tr><td class="html7magic"><label for="email">Email</label></td><td class="html7magic"><label for="pass">Password</label></td></tr><tr><td><input type="text" class="inputtext" name="email" id="email" tabindex="1" /></td><td><input type="password" class="inputtext" name="pass" id="pass" tabindex="2" /></td><td><label class="uiButton uiButtonConfirm"><input value="Login" tabindex="4" type="submit" /></label></td></tr><tr><td class="login_form_label_field"><input type="checkbox" class="inputcheckbox" value="1" id="persistent" name="persistent" checked="1" /><input type="hidden" name="default_persistent" value="1" /><label id="label_persistent" for="persistent">Keep me logged in</label></td><td class="login_form_label_field"><a href="http://www.facebook.com/reset.php" rel="nofollow">Forgot your password?</a></td></tr></table><input type="hidden" name="charset_test" value="&euro;,&acute;,€,´,?,?,?" /><input type="hidden" id="lsd" name="lsd" value="hEICz" autocomplete="off" /></form> </div></div></div></div><div class="WelcomePage_MainSell"><div class="WelcomePage_MainSellCenter clearfix"><div class="WelcomePage_MainSellLeft"><div class="WelcomePage_MainMessage">Facebook helps you connect and share with the people in your life.</div><div class="WelcomePage_MainMap">&nbsp;</div></div><div class="WelcomePage_MainSellRight"><div class="WelcomePage_SignUpSection"><div class="WelcomePage_SignUpMessage"><div class="WelcomePage_SignUpHeadline">Sign Up</div><div class="WelcomePage_SignUpSubheadline">It's free, and always will be.</div></div><div class="WelcomePage_SimpleReg" id="registration_container"><div><noscript><div id="no_js_box"><h2>Javascript is disabled on your browser.</h2><p>Please enable JavaScript on your browser or upgrade to a Javascript-capable browser to register for Facebook.</p></div></noscript><div id="simple_registration_container" class="simple_registration_container"><div id="reg_box"><form method="post" id="reg" name="reg" onsubmit="return function(event)&#123;return false;&#125;.call(this,event)!==false &amp;&amp; Event.__inlineSubmit(this,event)"><input type="hidden" autocomplete="off" name="post_form_id" value="c3a2bed7243b9a85f53d69f23a38da9d" /><input type="hidden" name="lsd" value="hEICz" autocomplete="off" /><input type="hidden" autocomplete="off" id="reg_instance" name="reg_instance" value="bpgeTawHFSiHa5-7SR4gbif7" /><input type="hidden" autocomplete="off" id="locale" name="locale" value="en_US" /><input type="hidden" autocomplete="off" id="terms" name="terms" value="on" /><input type="hidden" autocomplete="off" id="abtest_registration_group" name="abtest_registration_group" value="1" /><input type="hidden" autocomplete="off" id="referrer" name="referrer" value="" /><input type="hidden" autocomplete="off" id="md5pass" name="md5pass" value="" /><input type="hidden" autocomplete="off" id="validate_mx_records" name="validate_mx_records" value="1" /><input type="hidden" autocomplete="off" id="ab_test_data" name="ab_test_data" value="" /><div id="reg_form_box" class="large_form"><table class="uiGrid editor" cellspacing="0" cellpadding="1"><tbody><tr><td class="label">First Name:</td><td><div class="field_container"><input type="text" class="inputtext" id="firstname" name="firstname" /></div></td></tr><tr><td class="label">Last Name:</td><td><div class="field_container"><input type="text" class="inputtext" id="lastname" name="lastname" /></div></td></tr><tr><td class="label">Your Email:</td><td><div class="field_container"><input type="text" class="inputtext" id="reg_email__" name="reg_email__" /></div></td></tr><tr><td class="label">Re-enter Email:</td><td><div class="field_container"><input type="text" class="inputtext" id="reg_email_confirmation__" name="reg_email_confirmation__" /></div></td></tr><tr><td class="label">New Password:</td><td><div class="field_container"><input type="password" class="inputtext" id="reg_passwd__" name="reg_passwd__" value="" /></div></td></tr><tr><td class="label">I am:</td><td><div class="field_container"><div class="hidden_elem"><select><option></option><option></option></select><select><option></option><option></option></select></div><select class="select" name="sex" id="sex"><option value="0">Select Sex:</option><option value="1">Female</option><option value="2">Male</option></select></div></td></tr><tr><td class="label">Birthday:</td><td><div class="field_container"> <select class="" id="birthday_month" name="birthday_month" onchange="return run_with(this, [&quot;editor&quot;], function() &#123;editor_date_month_change(this, &quot;birthday_day&quot;, &quot;birthday_year&quot;);&#125;);"><option value="-1">Month:</option><option value="1">Jan</option>

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  • UIWebView - remote html loading local images

    - by AragornSG
    I'm trying to develop an application using UIWebView. The app is loading remote URL's, so in order to make it quick I want it to use the images included in the application bundle. I was wondering if there is a way to do it without forcing the application to manually replace the address of each image to point into local resources?

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  • routine to generate a 2d array from two 1d arrays and a function

    - by intuited
    I'm guessing that there's a word for this concept, and that it's available in at least some popular languages, but my perfunctory search was fruitless. A pseudocode example of what I'd like to do: function foo(a, b) { return a * b // EG } a = [ 1, 2, 3 ] b = [ 4, 5, 6 ] matrix = the_function_for_which_I_search(foo, [a, b] ) print matrix => [ [ 4, 8, 12], [5, 10, 15], [6, 12, 18] ] // or function concatenate(a,b) return a.b } print the_function_for_which_I_search( concatenate, [ a, b ]) => [ [ '14', '24', '34'], ['15', '25', '35'], [16', '26', '36'] ] In other words, function_for_which_I_search will apply the function given as its first argument to each combination of the elements of the two arrays passed as its second argument, and return the results as a two-dimensional array. I would like to know if such a routine has a common name, and if it's available in a python module, cpan package, ruby gem, pear package, etc. I'm also wondering if this is a core function in other languages, maybe haskell or R?

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  • Images are not appeared in Firefox

    - by moon
    I create small web app and it works in IE but I tried in firefox many css layouts are unavailable and images are not appeared.To appear image and to work in both browsers,how can I handle.Please tell me the way .Thanks

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  • How to programmatically generate WSDL from WCF service (Integration Testing)

    - by David Christiansen
    Hi All, I am looking to write some integration tests to compare the WSDL generated by WCF services against previous (and published) versions. This is to ensure the service contracts don't differ from time of release. I would like my tests to be self contained and not rely on any external resources such as hosting on IIS. I am thinking that I could recreate my IIS hosting environment within the test with something like... using (ServiceHost host = new ServiceHost(typeof(NSTest.HelloNS), new Uri("http://localhost:8000/Omega"))) { host.AddServiceEndpoint(typeof(NSTest.IMy_NS), new BasicHttpBinding(), "Primary"); ServiceMetadataBehavior behavior = new ServiceMetadataBehavior(); behavior.HttpGetEnabled = true; host.Description.Behaviors.Add(behavior); host.AddServiceEndpoint(typeof(IMetadataExchange), MetadataExchangeBindings.CreateMexHttpBinding(), "mex"); host.Open(); } Does anyone else have any better ideas?

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  • How to systematically generate images from data?

    - by adamvickers
    I work for a performing arts nonprofit. We have seating charts for each of the theaters we work with; each seating chart shows the number of sections, the shape of each section, and the number of rows in each section. We'd like to create dynamic seating charts based on this info. We'd like them to look/feel kinda like this: http://www.fansnap.com/tickets/177754-on. But the tricky part is we'd like to be able to store all the info about each theater (the section names, shape/size of each section, and number of rows in each section) as data and then build a system that reads this data and uses it to create a dynamic map. I'm a life-long web developer, but I don't have have any experience with a difficult graphics problem like this. I realize it's a complex problem and I don't expect anyone to give me a complete answer here, but I would love direction on where I should be looking for more info. Is what I'm describing possible? Does this sort of technique have a name? Where can I learn more about how to accomplish this? What software should I use? Any info would be helpful.

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  • link_to_remote does not generate correct url in Haml

    - by mathee
    In Haml, I've been trying to get the following link_to_remote call to work. It's called from the /questions/new view. #{link_to_remote image_tag('x.png'), :url => {:controller => 'questions', :action => 'remove_tag_from_cart'}} I've tried the following variations. #{link_to_remote image_tag('x.png'), :url => {:controller => :questions, :action => :remove_tag_from_cart}} #{link_to_remote image_tag('x.png'), :controller => 'questions', :action => 'remove_tag_from_cart'} #{link_to_remote image_tag('x.png'), :controller => :questions, :action => :remove_tag_from_cart} In every case, I get the following link: /questions/new#. I'm not sure why! I also have the following in routes.rb, thinking that was the problem... map.connect ':controller/remove_tag_from_cart', :action => 'remove_tag_from_cart'

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  • Generate xml containing animation information from ms ppt 2003/07 file

    - by Ravisha
    I am planning to write an application which has UI from MS ppt.Here is where all the animation will be configured. My application will just read xmls containing animation configuration and run it on a target device(Cannot mention details w.r.t device right now ,apologies for that) Not necessary that i want xmls it self but if there is a way to get animation details directly from the ppt file i will be more than happy. I will be going ahead with C#.Net 3.0 with windows XP as my OS.MY office will be either 2003 or 07.Can switch to any of these versions Please give suggestions as what will be the starting point for the same.Thanks in advance Please Let me know if any more details are needed

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  • Aligning multiple images into one image?

    - by Gerald Kaszuba
    What is a good method to align images together that may have different rotations, exposures, etc, but have the same background or other fixed reference? Adobe Photoshop can do this with its "Photomerge" feature. How can I do this programatically? Is there an Open Source application that does it?

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