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  • RSA implementations for Java, alternative to BC

    - by Tom Brito
    The RSA implementation that ships with Bouncy Castle only allows the encrypting of a single block of data. The RSA algorithm is not suited to streaming data and should not be used that way. In a situation like this you should encrypt the data using a randomly generated key and a symmetric cipher, after that you should encrypt the randomly generated key using RSA, and then send the encrypted data and the encrypted random key to the other end where they can reverse the process (ie. decrypt the random key using their RSA private key and then decrypt the data). I can't use the workarond of using symmetric key. So, are there other implementations of RSA than Bouncy Castle?

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  • Native XML WebService With Authentication Basic and SSL

    - by tom
    I'm using 2005 and the Native XML WebServices. The integrated authentication via HTTP:80 works fine. But i need the basic authentication which requires SSL. So if i change the web service to ssl i always get a connection reset (101). I tried several ports 80,443,9999 with the same outcome. What is the error?

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  • Java: how do I get a class literal from a generic type?

    - by Tom
    Typically, I've seen people use the class literal like this: Class<Foo> cls = Foo.class; But what if the type is generic, e.g. List? This works fine, but has a warning since List should be parameterized: Class<List> cls = List.class So why not add a <?>? Well, this causes a type mismatch error: Class<List<?>> cls = List.class I figured something like this would work, but this is just a plain ol' a syntax error: Class<List<Foo>> cls = List<Foo>.class How can I get a Class<List<Foo>> statically, e.g. using the class literal? I could use @SuppressWarnings("unchecked") to get rid of the warnings caused by the non-parameterized use of List in the first example, Class<List> cls = List.class, but I'd rather not. Any suggestions? Thanks!

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  • Obtaining FontMetrics before getting a Graphics instance

    - by Tom Castle
    Typically, I'd obtain a graphics instance something like this: BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB); Graphics2D g = img.createGraphics(); However, in the current project I'm working on, the width and height variables above are dependent upon the size of a number of text fragments that will later be drawn onto the graphics instance. But, to obtain the dimensions of the font being used I would usually use the FontMetrics that I get from the graphics object. FontMetrics metrics = g.getFontMetrics(); So, I have a nasty little dependency cycle. I cannot create the graphics object until I know the size of the text, and I cannot know the size of the text until I have a graphics object. One solution is just to create another BufferedImage/Graphics pair first in order to get the FontMetrics instance I need, but this seems unnecessary. So, is there a nicer way? Or is it the case that the width, height etc. properties for a Font are somehow dependent upon what (graphics, component...) the text is to be drawn on?

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  • Is there a Scala version of .irbrc or another way to define some default libraries for REPL use?

    - by Tom Morris
    I've written a little library that uses implicits to add functionality that one only needs when using the REPL in Scala. Ruby has libraries like this - for things like pretty printing, firing up text editors (like the interactive_editor gem which invokes Vim from irb - see this post), debuggers and the like. The library I am trying to write adds some methods to java.lang.Class and java.lang.reflect classes using the 'pimp my library' implicit conversion process to help you go and find documentation (initially, with Google, then later possibly with a JavaDoc/ScalaDoc viewer, and maybe the StackOverflow API eventually!). It's an itch-scratching library: I spend so much time copying and pasting classnames into Google that I figured I may as well automate the process. It is the sort of functionality that developers will want to add to their system for use only in the REPL - they shouldn't really be adding it to projects (partly because it may not be something that their fellow developers want, but also because if you are doing some exploratory development, it may be with just a Scala REPL that's not being invoked by an IDE or build tool). In my case, I want to include a few classes and set up some implicits - include a .jar on the CLASSPATH and import it, basically. In Ruby, this is the sort of thing that you'd add to your .irbrc file. Other REPLs have similar ways of setting options and importing libraries. Is there a similar file or way of doing this for the Scala REPL?

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  • Dynamic width of DIV (offsetWidth issue).

    - by Tom
    Hi all, I face issue with retrieving (via javascript) width of the div which content is changed (just before reading the widht via offsetWidth) in dynamic way (via changing innerHTML or using createTextNode). Here is some sample code: var con = document.getElementById('avContent'); //content div within page var temp = document.createElement('div');<br /> var text1 = document.createTextNode('CCCCC');<br /> temp.appendChild(text1);<br /> con.appendChild(temp);<br /> var length1 = temp.offsetWidth;<br /> var text2 = document.createTextNode('CCCCC33333333vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv');<br /> temp.removeChild(text1);<br /> temp.appendChild(text2);<br /> con.removeChild(temp);<br /> con.appendChild(temp); var length2 = temp.offsetWidth;<br /> The length1 and length2 do have the same width.. (the same result I get while using innerHTML instead of createTextNode). Looks like it's the same issue like described in following discussion: http://www.webdeveloper.com/forum/showthread.php?t=187716 Does anybody have answer (work around)? Thanks much for help in advance.

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  • Document.oncontextmenu, component is not available (firefox)

    - by Tom J Nowell
    I have a script for a website, and one of the things ti does right at the end if attempt to disable an anti-right click protection in a website if($("span[class=MembersNameDisplay]").exists()){ var list_row = document.getElementsByTagName('script'); if(list_row != null){ list_row[0].parentNode.removeChild(list_row[0]); } } document.oncontextmenu=new Function("return true"); In google chrome this works, however in firefox with greasemonkey, the last line fails and the protection is not removed. Error: Component is not available Line: 171 How do I fix this, and why does it fail under firefox?

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  • Android SQLiteConstraintException: error code 19: constraint failed

    - by Tom D
    I've seen other questions about this exception, but all of them seem to be resolved with the solution that a row with the primary key specified already exists. This doesn't seem to be the case for me. I have tried replacing all single quotes in my strings with double quotes, but the same problem occurs. I'm trying to insert a row into the Settings table of the SQLite database I've created by doing the following: db.execSQL("DROP TABLE IF EXISTS "+Settings.SETTINGS_TABLE_NAME + ";"); db.execSQL(CREATE_MEDIA_TABLE); db.execSQL(CREATE_SETTINGS_TABLE); Cursor c = getAllSettings(); //If there isn't already a settings row, create a row full of defaults if(c.getCount()==0){ ContentValues cv = new ContentValues(); cv.put(Settings.SETTING_UNIQUE_ID, "'"+Settings.uniqueID+"'"); cv.put(Settings.SETTING_DEVICE_ID, Settings.SETTING_DEVICE_ID_DEFAULT); cv.put(Settings.SETTING_CONNECTION_PREFERENCE, Settings.SETTING_CONNECTION_PREFERENCE_DEFAULT); cv.put(Settings.SETTING_AD_HOC_ENABLED, Settings.SETTING_AD_HOC_ENABLED_DEFAULT); cv.put(Settings.SETTING_SERVER_ADDRESS, Settings.SETTING_SERVER_ADDRESS_DEFAULT); cv.put(Settings.SETTING_RECORDING_MODE, Settings.SETTING_RECORDING_MODE_DEFAULT); cv.put(Settings.SETTING_PREVIEW_ENABLED, Settings.SETTING_PREVIEW_ENABLED_DEFAULT); cv.put(Settings.SETTING_PICTURE_RESOLUTION_X, Settings.SETTING_PICTURE_RESOLUTION_X_DEFAULT); cv.put(Settings.SETTING_PICTURE_RESOLUTION_Y, Settings.SETTING_PICTURE_RESOLUTION_Y_DEFAULT); cv.put(Settings.SETTING_VIDEO_RESOLUTION_X, Settings.SETTING_VIDEO_RESOLUTION_X_DEFAULT); cv.put(Settings.SETTING_VIDEO_RESOLUTION_Y, Settings.SETTING_VIDEO_RESOLUTION_Y_DEFAULT); cv.put(Settings.SETTING_VIDEO_FPS, Settings.SETTING_VIDEO_FPS_DEFAULT); cv.put(Settings.SETTING_AUDIO_BITRATE_KBPS, Settings.SETTING_AUDIO_BITRATE_KBPS_DEFAULT); cv.put(Settings.SETTING_STORE_TO_SD, Settings.SETTING_STORE_TO_SD_DEFAULT); cv.put(Settings.SETTING_STORAGE_LIMIT_MB, Settings.SETTING_STORAGE_LIMIT_MB_DEFAULT); this.db.insert(Settings.SETTINGS_TABLE_NAME, null, cv); } The CREATE_SETTINGS_TABLE string is defined as the following: private static String CREATE_SETTINGS_TABLE = "CREATE TABLE IF NOT EXISTS " + Settings.SETTINGS_TABLE_NAME + "(" + Settings.SETTING_UNIQUE_ID + " TEXT NOT NULL PRIMARY KEY, " + Settings.SETTING_DEVICE_ID + " TEXT NOT NULL , " + Settings.SETTING_CONNECTION_PREFERENCE + " TEXT NOT NULL CHECK("+Settings.SETTING_CONNECTION_PREFERENCE+" IN("+Settings.SETTING_CONNECTION_PREFERENCE_ALLOWED+")), " + Settings.SETTING_AD_HOC_ENABLED + " TEXT NOT NULL CHECK("+Settings.SETTING_AD_HOC_ENABLED+" IN("+Settings.SETTING_AD_HOC_ENABLED_ALLOWED+")), " + Settings.SETTING_SERVER_ADDRESS + " TEXT NOT NULL, " + Settings.SETTING_RECORDING_MODE + " TEXT NOT NULL CHECK("+Settings.SETTING_RECORDING_MODE+" IN("+Settings.SETTING_RECORDING_MODE_ALLOWED+")), " + Settings.SETTING_PREVIEW_ENABLED + " TEXT NOT NULL CHECK("+Settings.SETTING_PREVIEW_ENABLED+" IN("+Settings.SETTING_PREVIEW_ENABLED_ALLOWED+")), " + Settings.SETTING_PICTURE_RESOLUTION_X + " TEXT NOT NULL, " + Settings.SETTING_PICTURE_RESOLUTION_Y + " TEXT NOT NULL, " + Settings.SETTING_VIDEO_RESOLUTION_X + " TEXT NOT NULL, " + Settings.SETTING_VIDEO_RESOLUTION_Y + " TEXT NOT NULL, " + Settings.SETTING_VIDEO_FPS + " TEXT NOT NULL, " + Settings.SETTING_AUDIO_BITRATE_KBPS + " TEXT NOT NULL, " + Settings.SETTING_STORE_TO_SD + " TEXT NOT NULL CHECK("+Settings.SETTING_STORE_TO_SD+" IN("+Settings.SETTING_STORE_TO_SD_ALLOWED+")), " + Settings.SETTING_STORAGE_LIMIT_MB + " TEXT NOT NULL )"; However, when I execute my insert, I always get: 03-19 19:37:36.974: ERROR/Database(386): Error inserting server_address='0.0.0.0' storage_limit='-1' connection='none' preview_enabled='0' sd_enabled='1' video_fps='15' audio_bitrate='96' device_id='-1' recording_mode='none' picture_resolution_x='-1' picture_resolution_y='-1' unique_id='000000000000000' adhoc_enable='0' video_resolution_x='320' video_resolution_y='240' 03-19 19:45:34.284: ERROR/Database(446): android.database.sqlite.SQLiteConstraintException: error code 19: constraint failed It seems as if all the columns in my insert are not null. The row's primary key HAS to be unique, because it's the only row in the table. Therefore, the only thing I can think of is my CHECK conditions aren't true. Here are the predefined strings I'm using: public static final String SETTING_UNIQUE_ID = "unique_id"; public static final String SETTING_DEVICE_ID = "device_id"; public static final String SETTING_DEVICE_ID_DEFAULT = "'-1'"; public static final String SETTING_CONNECTION_PREFERENCE = "connection"; public static final String SETTING_CONNECTION_PREFERENCE_3G = "'3g'"; public static final String SETTING_CONNECTION_PREFERENCE_WIFI = "'wifi'"; public static final String SETTING_CONNECTION_PREFERENCE_NONE = "'none'"; public static final String SETTING_CONNECTION_PREFERENCE_ALLOWED = SETTING_CONNECTION_PREFERENCE_3G+","+SETTING_CONNECTION_PREFERENCE_WIFI+","+SETTING_CONNECTION_PREFERENCE_NONE; public static final String SETTING_CONNECTION_PREFERENCE_DEFAULT = SETTING_CONNECTION_PREFERENCE_NONE; public static final String SETTING_AD_HOC_ENABLED = "adhoc_enable"; public static final String SETTING_AD_HOC_ENABLED_ALLOWED = TRUE+","+FALSE; public static final String SETTING_AD_HOC_ENABLED_DEFAULT = FALSE; public static final String SETTING_SERVER_ADDRESS = "server_address"; public static final String SETTING_SERVER_ADDRESS_DEFAULT = "'0.0.0.0'"; public static final String SETTING_RECORDING_MODE = "recording_mode"; public static final String SETTING_RECORDING_MODE_VIDEO = "'video'"; public static final String SETTING_RECORDING_MODE_AUDIO = "'audio'"; public static final String SETTING_RECORDING_MODE_PICTURE = "'picture'"; public static final String SETTING_RECORDING_MODE_NONE = "'none'"; public static final String SETTING_RECORDING_MODE_ALLOWED = SETTING_RECORDING_MODE_VIDEO+","+SETTING_RECORDING_MODE_AUDIO+","+SETTING_RECORDING_MODE_PICTURE+","+SETTING_RECORDING_MODE_NONE; public static final String SETTING_RECORDING_MODE_DEFAULT = SETTING_RECORDING_MODE_NONE; public static final String SETTING_PREVIEW_ENABLED = "preview_enabled"; public static final String SETTING_PREVIEW_ENABLED_ALLOWED = TRUE+","+FALSE; public static final String SETTING_PREVIEW_ENABLED_DEFAULT = FALSE; public static final String SETTING_PICTURE_RESOLUTION_X = "picture_resolution_x"; public static final String SETTING_PICTURE_RESOLUTION_X_DEFAULT = "'-1'"; public static final String SETTING_PICTURE_RESOLUTION_Y = "picture_resolution_y"; public static final String SETTING_PICTURE_RESOLUTION_Y_DEFAULT = "'-1'"; public static final String SETTING_VIDEO_RESOLUTION_X = "video_resolution_x"; public static final String SETTING_VIDEO_RESOLUTION_X_DEFAULT = "'320'"; public static final String SETTING_VIDEO_RESOLUTION_Y = "video_resolution_y"; public static final String SETTING_VIDEO_RESOLUTION_Y_DEFAULT = "'240'"; public static final String SETTING_VIDEO_FPS = "video_fps"; public static final String SETTING_VIDEO_FPS_DEFAULT = "'15'"; public static final String SETTING_AUDIO_BITRATE_KBPS = "audio_bitrate"; public static final String SETTING_AUDIO_BITRATE_KBPS_DEFAULT = "'96'"; public static final String SETTING_STORE_TO_SD = "sd_enabled"; public static final String SETTING_STORE_TO_SD_ALLOWED = TRUE+","+FALSE; public static final String SETTING_STORE_TO_SD_DEFAULT = TRUE; public static final String SETTING_STORAGE_LIMIT_MB = "storage_limit"; public static final String SETTING_STORAGE_LIMIT_MB_DEFAULT = "'-1'"; public static final String SETTING_CLIP_LENGTH_SECONDS = "clip_length"; public static final String SETTING_CLIP_LENGTH_SECONDS_DEFAULT = "'300'"; Does anyone see what could be going on? I'm stumped. Thanks in advance.

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  • Android: Showing photos runs out of memory

    - by Tom Beech
    I'm using a dialog box to display images in my android project. The first one opens fine, but when I close it and do the process again to show a different one the app falls over with a memory error (it's running on a samsung galaxy s3 - so shouldnt be an issue). Error: 10-24 11:25:45.575: E/dalvikvm-heap(29194): Out of memory on a 31961104-byte allocation. 10-24 11:25:45.580: E/AndroidRuntime(29194): FATAL EXCEPTION: main 10-24 11:25:45.580: E/AndroidRuntime(29194): java.lang.OutOfMemoryError 10-24 11:25:45.580: E/AndroidRuntime(29194): at android.graphics.BitmapFactory.nativeDecodeStream(Native Method) 10-24 11:25:45.580: E/AndroidRuntime(29194): at android.graphics.BitmapFactory.decodeStream(BitmapFactory.java:587) 10-24 11:25:45.580: E/AndroidRuntime(29194): at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:389) 10-24 11:25:45.580: E/AndroidRuntime(29194): at android.graphics.BitmapFactory.decodeFile(BitmapFactory.java:418) 10-24 11:25:45.580: E/AndroidRuntime(29194): at android.graphics.drawable.Drawable.createFromPath(Drawable.java:882) 10-24 11:25:45.580: E/AndroidRuntime(29194): at android.widget.ImageView.resolveUri(ImageView.java:569) 10-24 11:25:45.580: E/AndroidRuntime(29194): at android.widget.ImageView.setImageURI(ImageView.java:340) 10-24 11:25:45.580: E/AndroidRuntime(29194): at com.directenquiries.assessment.tool.AddAsset.loadPhoto(AddAsset.java:771) 10-24 11:25:45.580: E/AndroidRuntime(29194): at com.directenquiries.assessment.tool.AddAsset$11.onClick(AddAsset.java:748) 10-24 11:25:45.580: E/AndroidRuntime(29194): at com.android.internal.app.AlertController$AlertParams$3.onItemClick(AlertController.java:936) 10-24 11:25:45.580: E/AndroidRuntime(29194): at android.widget.AdapterView.performItemClick(AdapterView.java:292) 10-24 11:25:45.580: E/AndroidRuntime(29194): at android.widget.AbsListView.performItemClick(AbsListView.java:1359) 10-24 11:25:45.580: E/AndroidRuntime(29194): at android.widget.AbsListView$PerformClick.run(AbsListView.java:2988) 10-24 11:25:45.580: E/AndroidRuntime(29194): at android.widget.AbsListView$1.run(AbsListView.java:3783) 10-24 11:25:45.580: E/AndroidRuntime(29194): at android.os.Handler.handleCallback(Handler.java:605) 10-24 11:25:45.580: E/AndroidRuntime(29194): at android.os.Handler.dispatchMessage(Handler.java:92) 10-24 11:25:45.580: E/AndroidRuntime(29194): at android.os.Looper.loop(Looper.java:137) 10-24 11:25:45.580: E/AndroidRuntime(29194): at android.app.ActivityThread.main(ActivityThread.java:4517) 10-24 11:25:45.580: E/AndroidRuntime(29194): at java.lang.reflect.Method.invokeNative(Native Method) 10-24 11:25:45.580: E/AndroidRuntime(29194): at java.lang.reflect.Method.invoke(Method.java:511) 10-24 11:25:45.580: E/AndroidRuntime(29194): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:993) 10-24 11:25:45.580: E/AndroidRuntime(29194): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:760) 10-24 11:25:45.580: E/AndroidRuntime(29194): at dalvik.system.NativeStart.main(Native Method) Loading code: public void loadPhotoList(){ Cursor f = db.rawQuery("select * from stationphotos where StationObjectID = '"+ checkStationObjectID + "'", null); final ArrayList<String> mHelperNames= new ArrayList<String>(); if(f.getCount() != 0) { f.moveToFirst(); f.moveToFirst(); while(!f.isAfterLast()) { mHelperNames.add(f.getString(f.getColumnIndex("FilePath"))); f.moveToNext(); } } f.close(); final String [] nameStrings = new String [mHelperNames.size()]; for(int i=0; i<mHelperNames.size(); i++) nameStrings[i] = mHelperNames.get(i).toString(); AlertDialog.Builder builder = new AlertDialog.Builder(this); builder.setTitle("Select Picture"); builder.setItems(nameStrings, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int item) { loadPhoto(mHelperNames.get(item).toString()); } }); AlertDialog alert = builder.create(); alert.show(); } public void loadPhoto(String imagepath){ Dialog dialog = new Dialog(this); dialog.setContentView(R.layout.activity_show_image); dialog.setTitle("Image"); dialog.setCancelable(true); ImageView img = (ImageView) dialog.findViewById(R.id.imageView1); img.setImageResource(R.drawable.ico_partial); Uri imgUri = Uri.parse(imagepath); img.setImageURI(imgUri); dialog.show(); }

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  • How can I write an installer for 32 and 64 bit

    - by tom greene
    I have a .NET app which works in 32 and 64 bit. I would like to write one single installer that installs to c:\program files, not c:\program files(x86) regardless of the platform. From this link: http://msdn.microsoft.com/en-us/library/w1behyzx(v=VS.90).aspx it doesn't look possible. Is it the case?

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  • How to write a good PHP database insert using an associative array

    - by Tom
    In PHP, I want to insert into a database using data contained in a associative array of field/value pairs. Example: $_fields = array('field1'=>'value1','field2'=>'value2','field3'=>'value3'); The resulting SQL insert should look as follows: INSERT INTO table (field1,field2,field3) VALUES ('value1','value2','value3'); I have come up with the following PHP one-liner: mysql_query("INSERT INTO table (".implode(',',array_keys($_fields)).") VALUES (".implode(',',array_values($_fields)).")"); It separates the keys and values of the the associative array and implodes to generate a comma-separated string . The problem is that it does not escape or quote the values that were inserted into the database. To illustrate the danger, Imagine if $_fields contained the following: $_fields = array('field1'=>"naustyvalue); drop table members; --"); The following SQL would be generated: INSERT INTO table (field1) VALUES (naustyvalue); drop table members; --; Luckily, multiple queries are not supported, nevertheless quoting and escaping are essential to prevent SQL injection vulnerabilities. How do you write your PHP Mysql Inserts? Note: PDO or mysqli prepared queries aren't currently an option for me because the codebase already uses mysql extensively - a change is planned but it'd take alot of resources to convert?

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  • How to stop/override a Jquery TimeOut function?

    - by Tom
    Hi, I have a small jquery snippet that displays notification message at the top of the screen in response to user actions on a page. The notification is often displayed after Ajax actions with dynamic content inside it. For example: $("#mini-txt").html("Thank you!"); $("#mini").fadeIn("fast"); setTimeout(function() {$("#mini").animate({height: "hide", opacity: "hide"}, "medium");}, 3000); The notification works well, except when a user does two or more actions in rapid succession, in which case the TimeOut function will confuse itself and the second message appears to come inside the previous 3000 milliseconds. Is there a way to "kill" the previous notification if a new action is performed. I've got no problem with the actions/selectors, just the TimeOut function.... either stopping it or overriding it somehow. Or perhaps there's a better alternative for getting the message to linger on the screen for a few seconds before disappearing? Thank you.

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  • Silverlight 3 version compatibility

    - by Tom Allen
    We've noticed a compatibility issue with a Silverlight 3 app which runs fine with v3.0.40818, v3.0.50106 and v4.0.50401 but refuses to load in v3.0.40624. Instead it gives a message box saying a more recent version of Silverlight is required. Does anyone know what the changes were between 3.0.40624 and 3.0.40818 or why the app might not be compatible?

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  • How to convert an Info.plist file from mac os project to iphone project?

    - by Tom Pace
    I am developing an app for the iPhone OS devices, and am using a third-party engine which is not well documented but I've made great progress with it anyway. The problem: The engine's developer strongly urges extending from the existing template projects bundled with the engine, but the engine's Info.plist files are Mac OSX project Info.plist files. This is an iPhone engine, and so I cannot understand why the Info.plist file is structured to take keys for Mac OS apps, but that's how it is. I did a FileMerge comparison to ensure there was nothing within the file itself that defined its use for one OS or the other, so I guess it's defined somewhere in the project settings. Edit - Opening the plist file in Xcode or Property List Editor and then trying to add a key such as "Icon already includes gloss and bevel effects" will not work in this iPhone project because it is not in the list. However, "Cocoa Java Application" and others are available!

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  • What is the standard way to deploy memcached?

    - by Tom
    I have two IIS servers and two MySQL servers. On all servers I have some available memory (More than a GB). What is the standard way to deploy memcached? Should I add a new server especially for memcached, or should I use my existing servers? If so, which servers? Thanks in advance

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  • How do I redirect stdin/stdout when I have a sequence of commands in Bash?

    - by Tom
    I've currently got a Bash command being executed (via Python's subprocess::Popen) which is reading from stdin, doing something and outputing to stdout. Something along the lines of: pid = subprocess.Popen( ["-c", "cmd1 | cmd2"], stdin = subprocess.PIPE, stdout = subprocess.PIPE, shell =True ) output_data = pid.communicate( "input data\n" ) Now, what I want to do is to change that to execute another command in that same subshell that will alter the state before the next commands execute, so my shell command line will now (conceptually) be: cmd0; cmd1 | cmd2 Is there any way to have the input sent to cmd1 instead of cmd0 in this scenario? I'm assuming the output will include cmd0's output (which will be empty) followed by cmd2's output. cmd0 shouldn't actually read anything from stdin, does that make a difference in this situation? I know this is probably just a dumb way of doing this, I'm trying to patch in cmd0 without altering the other code too significantly. That said, I'm open to suggestions if there's a much cleaner way to approach this.

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  • Symfony 1.4: Storing an array in session with SetAttribute

    - by Tom
    Hi, I'm wondering if someone knows how to store an array into a user session? This is the method to store a single attribute: $this->getUser()->setAttribute('something', $something); And the documentation says: "User attributes can store any type of data (strings, arrays, and associative arrays)" ... but doesn't say anything more. The API documentation doesn't have a "SetAttributes" or something similarly obvious. Thank you.

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  • Is adding a bit mask to all tables in a database useful?

    - by Tom
    A colleague is adding a bit mask to all our database tables. In theory this is so we can track certain properties of each row across the entire system. For example... Is the row shipped with the system or added by the client once they've started using the system Has the row been deleted from the table (soft deletes) Is the row a default value within a set of rows Is this a good idea? Are there other uses where this approach would be beneficial? My preference is these properties are obviously important, and having a dedicated column for each property is justified to make what is happening clearer to fellow developers.

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  • Checking if an object has been released before sending a message to it

    - by Tom Irving
    I've only recently noticed a crash in one of my apps when an object tried to message its delegate and the delegate had already been released. At the moment, just before calling any delegate methods, I run this check: if (delegate && [delegate respondsToSelector:...]){ [delegate ...]; } But obviously this doesn't account for if the delegate isn't nil, but has been deallocated. Besides setting the object's delegate to nil in the delegate's dealloc method, is there a way to check if the delegate has already been released just incase I no longer have a reference to the object.

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  • Given a typical Rails 3 environment, why am I unable to execute any tests?

    - by Tom
    I'm working on writing simple unit tests for a Rails 3 project, but I'm unable to actually execute any tests. Case in point, attempting to run the test auto-generated by Rails fails: require 'test_helper' class UserTest < ActiveSupport::TestCase # Replace this with your real tests. test "the truth" do assert true end end Results in the following error: <internal:lib/rubygems/custom_require>:29:in `require': no such file to load -- test_helper (LoadError) from <internal:lib/rubygems/custom_require>:29:in `require' from user_test.rb:1:in `<main>' Commenting out the require 'test_helper' line and attempting to run the test results in this error: user_test.rb:3:in `<main>': uninitialized constant Object::ActiveSupport (NameError) The action pack gems appear to be properly installed and up to date: actionmailer (3.0.3, 2.3.5) actionpack (3.0.3, 2.3.5) activemodel (3.0.3) activerecord (3.0.3, 2.3.5) activeresource (3.0.3, 2.3.5) activesupport (3.0.3, 2.3.5) Ruby is at 1.9.2p0 and Rails is at 3.0.3. The sample dump of my test directory is as follows: /fixtures /functional /integration /performance /unit -- /helpers -- user_helper_test.rb -- user_test.rb test_helper.rb I've never seen this problem before - I've run the typical rake tasks for preparing the test environment. I have nothing out of the ordinary in my application or environment configuration files, nor have I installed any unusual gems that would interfere with the test environment. Edit Xavier Holt's suggestion, explicitly specifying the path to the test_helper worked; however, this revealed an issue with ActiveSupport. Now when I attempt to run the test, I receive the following error message (as also listed above): user_test.rb:3:in `<main>': uninitialized constant Object::ActiveSupport (NameError) But as you can see above, Action Pack is all installed and update to date.

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