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  • OSMDroid simple example required

    - by Bex
    Hi! I am trying to create an app that uses offline maps and custom tiles. For this I have decided to use OSMDroid and have included the jar within my project. I will create my custom tiles using MOBAC. I have been directed to these examples: http://code.google.com/p/osmdroid/source/browse/#svn%2Ftrunk%2FOpenStreetMapViewer%2Fsrc%2Forg%2Fosmdroid%2Fsamples but I am struggling to follow them as I am new to both java and android. I have created a class file called test (which I have created following an example!): public class test extends Activity { /** Called when the activity is first created. */ protected static final String PROVIDER_NAME = LocationManager.GPS_PROVIDER; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); MapView map = (MapView) findViewById(R.id.map); map.setTileSource(TileSourceFactory.MAPQUESTOSM); map.setBuiltInZoomControls(true); map.setMultiTouchControls(true); map.getController().setZoom(16); map.getController().setCenter(new GeoPoint(30266000, -97739000)); } } with a layout file: <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> <org.osmdroid.views.MapView android:id="@+id/map" android:layout_width="fill_parent" android:layout_height="fill_parent" tilesource="MapquestOSM" android:layout_weight="1" /> </LinearLayout> When I run this I see no map, just an empty grid. I think this is due to my tilesource but I'm not sure what I need to change it to. Can anyone help? Bex

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  • Static linking in Qt --> link errors in VS 2008

    - by ChruS
    Today I dediced to make static linking in Qt. I used Qt4 with Visual Studio and static C runtime article. The 3rd step took quite a long time. When it was finished I opened my project in VS 2008, made Build->Clean Solution and try to Release. Unfortunately I got link errors: warning LNK4098: defaultlib 'libcmt.lib' conflicts with use of other libs; use /NODEFAULTLIB:library error LNK2019: unresolved external symbol "private: static struct QString::Data QString::shared_null" (?shared_null@QString@@0UData@1@A) referenced in function "public: __thiscall QString::QString(void)" (??0QString@@QAE@XZ) error LNK2019: unresolved external symbol "private: static struct QByteArray::Data QByteArray::shared_null" (?shared_null@QByteArray@@0UData@1@A) referenced in function "public: __thiscall QByteArray::QByteArray(void)" (??0QByteArray@@QAE@XZ) error LNK2001: unresolved external symbol "private: static struct QByteArray::Data QByteArray::shared_null" (?shared_null@QByteArray@@0UData@1@A) error LNK2001: unresolved external symbol "public: static struct QMetaObject const QDialog::staticMetaObject" (?staticMetaObject@QDialog@@2UQMetaObject@@B) error LNK2001: unresolved external symbol "public: static struct QMetaObject const QDialog::staticMetaObject" (?staticMetaObject@QDialog@@2UQMetaObject@@B) error LNK2001: unresolved external symbol "public: static struct QMetaObject const QDialog::staticMetaObject" (?staticMetaObject@QDialog@@2UQMetaObject@@B) error LNK2019: unresolved external symbol "public: static enum QSysInfo::WinVersion const QSysInfo::WindowsVersion" (?WindowsVersion@QSysInfo@@2W4WinVersion@1@B) referenced in function _WinMain@16 What i did wrong? Help to fix this pls.

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  • SQL Server insert with XML parameter - empty string not converting to null for numeric

    - by Mayo
    I have a stored procedure that takes an XML parameter and inserts the "Entity" nodes as records into a table. This works fine unless one of the numeric fields has a value of empty string in the XML. Then it throws an "error converting data type nvarchar to numeric" error. Is there a way for me to tell SQL to convert empty string to null for those numeric fields in the code below? -- @importData XML <- stored procedure param DECLARE @l_index INT EXECUTE sp_xml_preparedocument @l_index OUTPUT, @importData INSERT INTO dbo.myTable ( [field1] ,[field2] ,[field3] ) SELECT [field1] ,[field2] ,[field3] FROM OPENXML(@l_index, 'Entities/Entity', 1) WITH ( field1 int 'field1' ,field2 varchar(40) 'field2' ,field3 decimal(15, 2) 'field3' ) EXECUTE sp_xml_removedocument @l_index EDIT: And if it helps, sample XML. Error is thrown unless I comment out field3 in the code above or provide a value in field3 below. <?xml version="1.0" encoding="utf-16"?> <Entities> <Entity> <field1>2435</field1> <field2>843257-3242</field2> <field3 /> </Entity> </Entities>

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  • mono --aot with MinGW: unknown pseudo-op: `.local'

    - by Jared Updike
    Can I user mono's AOT feature to natively "pre-compile" .NET DLLs (and or EXEs) to make them harder to reverse engineer? If so, how do I get mono/AOT working in Windows 7? (I'm running x64 but the app is targeting x86 explicitly.) I just installed Mono 2.6.3 and MinGW 5.1.6 and I'm trying to AOT compile an exe (or a dll, it doesn't matter). I get screens and screens of error messages: C:\Users\jupdike\AppData\Local\Temp\mono_aot_XSDEAV:533: Error: junk at end of line, first unrecognized character is `H' C:\Users\jupdike\AppData\Local\Temp\mono_aot_XSDEAV:539: Error: unknown pseudo-op: `.local' C:\Users\jupdike\AppData\Local\Temp\mono_aot_XSDEAV:546: Warning: .size pseudo-op used outside of .def/.endef ignored. C:\Users\jupdike\AppData\Local\Temp\mono_aot_XSDEAV:546: Error: junk at end of line, first unrecognized character is `H' I can open the generated assembly code but I have no idea why the assembler chokes on it: .size HappyForms_TextForm__ctor_string_string_string_bool,.-HappyForms_TextForm__ctor_string_string_string_bool (533) _.Lme_a: .Lme_a: .balign 16 _.Lm_b: .Lm_b: .local HappyForms_TextForm_get_InputValue (539) _HappyForms_TextForm_get_InputValue: HappyForms_TextForm_get_InputValue: .byte 85,139,236,131,236,8,139,69,8,139,128,216,2,0,0,131,236,12,80,139,0,144,144,144,255,144,200,2,0,0,131,196 .byte 16,201,195 .size HappyForms_TextForm_get_InputValue,.-HappyForms_TextForm_get_InputValue (546) (numbers above in parens are line numbers)

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  • "no block given" errors with cache_money

    - by emh
    i've inherited a site that in production is generating dozens of "no block given" exceptions every 5 minutes. the top of the stack trace is: vendor/gems/nkallen-cache-money-0.2.5/lib/cash/accessor.rb:42:in `add' vendor/gems/nkallen-cache-money-0.2.5/lib/cash/accessor.rb:33:in `get' vendor/gems/nkallen-cache-money-0.2.5/lib/cash/accessor.rb:22:in `call' vendor/gems/nkallen-cache-money-0.2.5/lib/cash/accessor.rb:22:in `fetch' vendor/gems/nkallen-cache-money-0.2.5/lib/cash/accessor.rb:31:in `get' so it appears that the problem is in the cache money plugin. has anyone experienced something similar? i've cut and pasted the relevant code below -- anyone more familiar with blocks able to discern any obvious problems? 11 def fetch(keys, options = {}, &block) 12 case keys 13 when Array 14 keys = keys.collect { |key| cache_key(key) } 15 hits = repository.get_multi(keys) 16 if (missed_keys = keys - hits.keys).any? 17 missed_values = block.call(missed_keys) 18 hits.merge!(missed_keys.zip(Array(missed_values)).to_hash) 19 end 20 hits 21 else 22 repository.get(cache_key(keys), options[:raw]) || (block ? block.call : nil) 23 end 24 end 25 26 def get(keys, options = {}, &block) 27 case keys 28 when Array 29 fetch(keys, options, &block) 30 else 31 fetch(keys, options) do 32 if block_given? 33 add(keys, result = yield(keys), options) 34 result 35 end 36 end 37 end 38 end 39 40 def add(key, value, options = {}) 41 if repository.add(cache_key(key), value, options[:ttl] || 0, options[:raw]) == "NOT_STORED\r\n" 42 yield 43 end 44 end

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  • Thinking sphinx: Problems with polymorphic associations

    - by auralbee
    Hello, I recently switched from ultrasphinx to thinking_sphinx for full-text search. I am trying to figure out how to index fields of polymorphic associations. I found some information but I still have some problems, although it seems to be easy. Here is my setup: class Info < ActiveRecord::Base belongs_to :mappable, :polymorphic => true define_index indexes mappable_type indexes mappable(:name), :as => :mappable_name end class A < ActiveRecord::Base has_many :infos, :as => :mappable end class B < ActiveRecord::Base has_many :infos, :as => :mappable end Amongst others, I want to do a search in the name column of A and B (both classes have this column), so I added the field to my index. When I do rake thinking_sphinx:index I get the following error: Generating Configuration to .../config/development.sphinx.conf rake aborted! undefined method `connection' for Object:Class .../.gem/ruby/1.8/gems/thinking-sphinx-1.3.16/lib/thinking_sphinx/ association.rb:149:in `casted_options' Any idea? Am I missing something? Thanks in advance. Tobi

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  • Oracle rownum in db2 - Java data archiving

    - by HonorGod
    I have a data archiving process in java that moves data between db2 and sybase. FYI - This is not done through any import/export process because there are several conditions on each table that are available on run-time and so this process is developed in java. Right now I have single DatabaseReader and DatabaseWriter defined for each source and destination combination so that data is moved in multiple threads. I guess I wanted to expand this further where I can have Multiple DatabaseReaders and Multiple DatabaseWriters defined for each source and destination combination. So, for example if the source data is about 100 rows and I defined 10 readers and 10 writer, each reader will read 10 rows and give them to the writer. I hope process will give me extreme performance depending on the resources available on the server [CPU, Memory etc]. But I guess the problem is these source tables do not have primary keys and it is extremely difficult to grab rows in multiple sets. Oracle provides rownum concept and i guess the life is much simpler there....but how about db2? How can I achieve this behavior with db2? Is there a way to say fetch first 10 records and then fetch next 10 records and so on? Any suggestions / ideas ? Db2 Version - DB2 v8.1.0.144 Fix Pack Num - 16 Linux

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  • preg_match , pattern, php

    - by Michael
    I'm trying to extract some specific pictures from html content . Currently I have the following array [1] = Array ( [0] = BuEZm5g!Wk~$(KGrHqQH-DgEvrb2CLuOBL-vbkHlKw~~_14.JPG#!BuEZm5g!Wk~$(KGrHqQH-DgEvrb2CLuOBL-vbkHlKw~~_12.JPG|1#http://i.ebayimg.com/08#!BuEZqMQBGk~$(KGrHqQH-DoEvrKYSoPiBL-vb)WgLw~~_14.JPG#!BuEZqMQBGk~$(KGrHqQH-DoEvrKYSoPiBL-vb)WgLw~~_12.JPG|2#http://i.ebayimg.com/13#!BuEZtkw!2k~$(KGrHqYH-EYEvsh4EjJSBL-vb-bLow~~_14.JPG#!BuEZtkw!2k~$(KGrHqYH-EYEvsh4EjJSBL-vb-bLow~~_12.JPG|3#http://i.ebayimg.com/03#!BuEZ)!wEGk~$(KGrHqYH-DwEvq8Z1JuQBL-vcMOoFQ~~_14.JPG#!BuEZ)!wEGk~$(KGrHqYH-DwEvq8Z1JuQBL-vcMOoFQ~~_12.JPG|4#http://i.ebayimg.com/09#!BuEZ1IQEGk~$(KGrHqEH-D0EvqwClvviBL-vcclJwg~~_14.JPG#!BuEZ1IQEGk~$(KGrHqEH-D0EvqwClvviBL-vcclJwg~~_12.JPG|5#http://i.ebayimg.com/17#!BuEZ4FQCWk~$(KGrHqUH-DMEvS+,FRj5BL-vco)Qgg~~_14.JPG#!BuEZ4FQCWk~$(KGrHqUH-DMEvS+,FRj5BL-vco)Qgg~~_12.JPG|6#http://i.ebayimg.com/17#!BuEZ7FQEWk~$(KGrHqYH-EYEvsh4EjJSBL-vc1v2Hg~~_14.JPG#!BuEZ7FQEWk~$(KGrHqYH-EYEvsh4EjJSBL-vc1v2Hg~~_12.JPG|7#http://i.ebayimg.com/12#!BuEZ-c!Bmk~$(KGrHqQH-CYEvr5z9)NVBL-vdC,)Mg~~_14.JPG#!BuEZ-c!Bmk~$(KGrHqQH-CYEvr5z9)NVBL-vdC,)Mg~~_12.JPG|8#http://i.ebayimg.com/20#!BuE,CNgCWk~$(KGrHqIH-CIEvqKBurmhBL-vdRBe3!~~_14.JPG#!BuE,CNgCWk~$(KGrHqIH-CIEvqKBurmhBL-vdRBe3!~~_12.JPG|9#http://i.ebayimg.com/24#!BuE,FN!EWk~$(KGrHqUH-C0EvsBdjbv0BL-vdeFkD!~~_14.JPG#!BuE,FN!EWk~$(KGrHqUH-C0EvsBdjbv0BL-vdeFkD!~~_12.JPG|10#http://i.ebayimg.com/16#!BuE,IOgBmk~$(KGrHqEH-EMEvpym7mSLBL-vdqI6nw~~_14.JPG#!BuE,IOgBmk~$(KGrHqEH-EMEvpym7mSLBL-vdqI6nw~~ ) I need to extract only the pictures that start with ! and ends in 12.JPG . An example of expected result is !BuEZm5g!Wk~$(KGrHqQH-DgEvrb2CLuOBL-vbkHlKw~~_12.JPG . I have a pattern but it doesn't work for some reasons that I don't know . It is $pattern = "/#\!(.*)_12.JPG/"; Thank you in advance for any help

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  • Boost Mersenne Twister: how to seed with more than one value?

    - by Eamon Nerbonne
    I'm using the boost mt19937 implementation for a simulation. The simulation needs to be reproducible, and that means storing and potentially reusing the RNG seeds later. I'm using the windows crypto api to generate the seed values because I need an external source for the seeds and not because of any particular guarantees of randomness. The output of any simulation run will have a note including the RNG seed - so the seed needs to be reasonably short. On the other hand, as part of the analysis of the simulation, I'll be comparing several runs - but to be sure that these runs are actually different, I'll need to use different seeds - so the seed needs to be long enough to avoid accidental collisions. I've determined that 64-bits of seeding should suffice; the chance of a collision will reach 50% after about 2^32 runs - that probability is low enough that the average error caused by it is negligible to me. Using just 32-bits of seed is tricky; the chance of a collision reaches 50% already after 2^16 runs; and that's a little too likely for my tastes. Unfortunately, the boost implementation either seeds with a full state vector - which is far, far too long - or a single 32-bit unsigned long - which isn't ideal. How can I seed the generator with more than 32-bits but less than a full state vector? I tried just padding the vector or repeating the seeds to fill the state vector, but even a cursory glance at the results shows that that generates poor results.

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  • How to solve non-linear equations using python

    - by stars83clouds
    I have the following code: #!/usr/bin/env python from scipy.optimize import fsolve import math h = 6.634e-27 k = 1.38e-16 freq1 = 88633.9360e6 freq2 = 88631.8473e6 freq3 = 88630.4157e6 def J(freq,T): return (h*freq/k)/(math.exp(h*freq/(k*T))-1) def equations(x,y,z,w,a,b,c,d): f1 = a*(J(freq1,y)-J(freq1,2.73))*(1-math.exp(-a*z))-(J(freq2,x)-J(freq2,2.73))*(1-math.exp(-z)) f2 = b*(J(freq3,w)-J(freq3,2.73))*(1-math.exp(-b*z))-(J(freq2,x)-J(freq2,2.73))*(1-math.exp(-z)) f3 = c*(J(freq3,w)-J(freq3,2.73))*(1-math.exp(-b*z))-(J(freq1,y)-J(freq1,2.73))*(1-math.exp(-a*z)) f4 = d*(J((freq3+freq1)/2,(y+w)/2)-J((freq3+freq1)/2,2.73))-(J(freq2,x)-J(freq2,2.73))*(1-math.exp(-z)) return (f1,f2,f3,f4) So, I have defined the equations in the above code. However, I now wish to solve the above set of equations using fsolve or other alternative non-linear numerical routine. I tried the following syntax but with no avail: x,y,z,w = fsolve(equations, (1,1,1,1)) I keep getting the error that "x" is not defined. I am executing all commands at the command-line, since I have no idea how to run a batch of commands as above automatically in python. I welcome any advice on how to solve this.

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  • mySQL need to merge fields and get unique rows

    - by jiudev
    i have a database with +1 million rows and the stuktur looks like: CREATE TABLE IF NOT EXISTS `Performance` ( `id` int(11) NOT NULL AUTO_INCREMENT, `CIDs` varchar(100) DEFAULT NULL, `COLOR` varchar(100) DEFAULT NULL, `Name` varchar(255) DEFAULT NULL, `XT` bigint(16) DEFAULT NULL, `MP` varchar(100) DEFAULT NULL, PRIMARY KEY (`id`), KEY `CIDs` (`CIDs`), KEY `COLOR` (`COLOR`), KEY `Name` (`Name`), KEY `XT` (`XT`) ) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=0 ; insert into `Performance` (`id`, `CIDs`, `COLOR`, `Name`, `XT`, `MP`) VALUES (1, '1253374160', 'test test test test test', 'Load1', '89421331221', ''), (2, '1271672029', NULL, 'Load1', '19421331221', NULL), (3, '1188959688', NULL, 'Load2', '39421331221', NULL), (4, '1271672029', NULL, 'Load3', '49421341221', 'Description'), (5, '1271888888', NULL, 'Load4', '59421331221', 'Description'); The Output should look like: +----+------------+--------------------------+-------------+-------------+-------+-----------+---------+ | id | CIDs | COLOR | XT | MP | Name | PIDs | unqName | +----+------------+--------------------------+-------------+-------------+-------+-----------+---------+ | 1 | 1253374160 | test test test test test | 89421331221 | | Load1 | 1,2 | Load1 | | 3 | 1188959688 | NULL | 39421331221 | NULL | Load2 | 3 | Load2 | | 4 | 1271672029 | NULL | 49421341221 | Description | Load3 | 4,5 | Load3 | +----+------------+--------------------------+-------------+-------------+-------+-----------+---------+ any ideas, how i could do this as fast as possible? I have tried with some group by, but it takes some Minutes :/ Thanks Advance //edit: for the solution with the group by, i needed 4 subquerys :/ //edit2: as requested: select id, CIDs, COLOR, XT, MP, Name, concat(PIDs,",",GROUP_CONCAT(DISTINCT id)) as PIDs, IFNULL(Name,id) as unqName from ( select id, CIDs, COLOR, XT, MP, Name, concat(PIDs,",",GROUP_CONCAT(DISTINCT id)) as PIDs, IFNULL(MP,id) as unqMP from ( select id, CIDs, COLOR, XT, MP, Name, concat(PIDs,",",GROUP_CONCAT(DISTINCT id)) as PIDs, IFNULL(XT,id) as unqXT from ( select id, CIDs, COLOR, XT, MP, Name, GROUP_CONCAT(DISTINCT id) as PIDs, IFNULL(COLOR,id) as unqCOLOR from Performance group by unqCOLOR ) m group by unqXT ) x group by unqMP ) y group by unqName

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  • [NSCFNumber _isNaturallyRTL]: unrecognized selector sent to instance 0x605ac10

    - by Risma
    my app got crashed an showed that keyword. There is no error and warning. can some body help me?? this is stack that showed : Call stack at first throw: ( 0 CoreFoundation 0x012ccbe9 __exceptionPreprocess + 185 1 libobjc.A.dylib 0x014215c2 objc_exception_throw + 47 2 CoreFoundation 0x012ce6fb -[NSObject(NSObject) doesNotRecognizeSelector:] + 187 3 CoreFoundation 0x0123e366 ___forwarding___ + 966 4 CoreFoundation 0x0123df22 _CF_forwarding_prep_0 + 50 5 UIKit 0x0042d35e -[UITextField setText:] + 53 6 Koder232_risma_edited 0x0006427a -[FilePropertiesViewController viewWillAppear:] + 442 7 UIKit 0x003c4d52 -[UIView(Hierarchy) _willMoveToWindow:withAncestorView:] + 207 8 UIKit 0x003cfa2b -[UIView(Hierarchy) _makeSubtreePerformSelector:withObject:withObject:copySublayers:] + 378 9 UIKit 0x003cfa5c -[UIView(Hierarchy) _makeSubtreePerformSelector:withObject:withObject:copySublayers:] + 427 10 UIKit 0x003cfa5c -[UIView(Hierarchy) _makeSubtreePerformSelector:withObject:withObject:copySublayers:] + 427 11 UIKit 0x003c6b36 -[UIView(Internal) _addSubview:positioned:relativeTo:] + 370 12 UIKit 0x003c514f -[UIView(Hierarchy) addSubview:] + 57 13 UIKit 0x006ad8ae -[UIPopoverView presentFromRect:inView:contentSize:backgroundStyle:animated:] + 1920 14 UIKit 0x006a0a4c -[UIPopoverView presentFromRect:inView:animated:] + 236 15 UIKit 0x006d9b20 -[UIPopoverController presentPopoverFromRect:inView:permittedArrowDirections:animated:] + 1046 16 Koder232_risma_edited 0x0001f90f -[codeViewController arrangeTabWithTypeGesture:andNumtag:] + 4683 17 Koder232_risma_edited 0x0001e68f -[codeViewController setTap2:] + 99 18 UIKit 0x0061e9c7 -[UIGestureRecognizer _updateGestureWithEvent:] + 727 19 UIKit 0x0061a9d6 -[UIGestureRecognizer _delayedUpdateGesture] + 47 20 UIKit 0x00620fa5 _UIGestureRecognizerUpdateObserver + 584 21 UIKit 0x0062118a _UIGestureRecognizerUpdateGesturesFromSendEvent + 51 22 UIKit 0x003bc6b4 -[UIWindow _sendGesturesForEvent:] + 1292 23 UIKit 0x003b7f87 -[UIWindow sendEvent:] + 105 24 UIKit 0x0039b37a -[UIApplication sendEvent:] + 447 25 UIKit 0x003a0732 _UIApplicationHandleEvent + 7576 26 GraphicsServices 0x0191fa36 PurpleEventCallback + 1550 27 CoreFoundation 0x012ae064 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE1_PERFORM_FUNCTION__ + 52 28 CoreFoundation 0x0120e6f7 __CFRunLoopDoSource1 + 215 29 CoreFoundation 0x0120b983 __CFRunLoopRun + 979 30 CoreFoundation 0x0120b240 CFRunLoopRunSpecific + 208 31 CoreFoundation 0x0120b161 CFRunLoopRunInMode + 97 32 GraphicsServices 0x0191e268 GSEventRunModal + 217 33 GraphicsServices 0x0191e32d GSEventRun + 115 34 UIKit 0x003a442e UIApplicationMain + 1160 35 Koder232_risma_edited 0x00002680 main + 102 36 Koder232_risma_edited 0x00002611 start + 53 37 ??? 0x00000001 0x0 + 1 )

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  • This is more a matlab/math brain teaser than a question

    - by gd047
    Here is the setup. No assumptions for the values I am using. n=2; % dimension of vectors x and (square) matrix P r=2; % number of x vectors and P matrices x1 = [3;5] x2 = [9;6] x = cat(2,x1,x2) P1 = [6,11;15,-1] P2 = [2,21;-2,3] P(:,1)=P1(:) P(:,2)=P2(:) modePr = [-.4;16] TransPr=[5.9,0.1;20.2,-4.8] pred_modePr = TransPr'*modePr MixPr = TransPr.*(modePr*(pred_modePr.^(-1))') x0 = x*MixPr Then it was time to apply the following formula to get myP , where µij is MixPr. I used this code to get it: myP=zeros(n*n,r); Ptables(:,:,1)=P1; Ptables(:,:,2)=P2; for j=1:r for i = 1:r; temp = MixPr(i,j)*(Ptables(:,:,i) + ... (x(:,i)-x0(:,j))*(x(:,i)-x0(:,j))'); myP(:,j)= myP(:,j) + temp(:); end end Some brilliant guy proposed this formula as another way to produce myP for j=1:r xk1=x(:,j); PP=xk1*xk1'; PP0(:,j)=PP(:); xk1=x0(:,j); PP=xk1*xk1'; PP1(:,j)=PP(:); end myP = (P+PP0)*MixPr-PP1 I tried to formulate the equality between the two methods and seems to be this one. To make things easier, I ignored from both methods the summation of matrix P. where the first part denotes the formula that I used, while the second comes from his code snippet. Do you think this is an obvious equality? If yes, ignore all the above and just try to explain why. I could only start from the LHS, and after some algebra I think I proved it equals to the RHS. However I can't see how did he (or she) think of it in the first place.

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  • Are web-safe colors still relevant?

    - by Gavin Miller
    Since the vast majority of monitors are 16-bit color or more, including mobile devices, does it make sense to even consider web-safe colors when choosing color schemes? Or is it something that ought to be relegated to history as a piece of trivia? For those of you that don't know what web-safe colors are: Another set of 216 color values is commonly considered to be the "web-safe" color palette, developed at a time when many computer displays were only capable of displaying 256 colors. A set of colors was needed that could be shown without dithering on 256-color displays; the number 216 was chosen partly because computer operating systems customarily reserved sixteen to twenty colors for their own use; it was also selected because it allows exactly six shades each of red, green, and blue (6 × 6 × 6 = 216). The list of colors is often presented as if it has special properties that render them immune to dithering. In fact, on 256-color displays applications can set a palette of any selection of colors that they choose, dithering the rest. These colors were chosen specifically because they matched the palettes selected by the then leading browser applications. [Wikipedia]

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  • Xcode raises exception when refactoring

    - by Sam Gwydir
    When I run a refactor on my code in xcode, all the files are correctly refactored except one, and when I click to check the changes made in that file, the following 'Internal Error Occurs': Uncaught Exception: Invalid parameter not satisfying: fileName Stack Backtrace: The stack backtrace has been logged to the console. Here is what it spat out in the console: 4/7/10 06:47:30 Xcode[35355] [MT] Uncaught Exception: Invalid parameter not satisfying: fileName Backtrace: 0 0x92842bbd __raiseError (in CoreFoundation) 1 0x914b9509 objc_exception_throw (in libobjc.A.dylib) 2 0x92842908 +[NSException raise:format:arguments:] (in CoreFoundation) 3 0x98801dc3 -[NSAssertionHandler handleFailureInMethod:object:file:lineNumber:description:] (in Foundation) 4 0x98db0f8e -[NSDocument(NSDeprecated) initWithContentsOfFile:ofType:] (in AppKit) 5 0x0075c07e -[PBXTextFileDocument initWithContentsOfFile:ofType:] (in DevToolsInterface) 6 0x007dc5be -[PBXFileDocument initWithFileReference:usingType:] (in DevToolsInterface) 7 0x00b1c0f8 -[XCRefactoringFileChangeSet(XCRefactoringModule_HelperMethods) referencedTextFileDocument] (in DevToolsInterface) 8 0x00b1d1f4 -[XCRefactoringEditableExistingTextFileChangeSet populateComparator:] (in DevToolsInterface) 9 0x00ab19b7 -[XCRefactoringModuleFileItem populateComparator:previewFinished:] (in DevToolsInterface) 10 0x00aa4606 -[XCRefactoringModule(MasterListDelegate) outlineViewSelectionDidChange:] (in DevToolsInterface) 11 0x987381cb _nsnote_callback (in Foundation) 12 0x927ca3f9 __CFXNotificationPost (in CoreFoundation) 13 0x927c9e2a _CFXNotificationPostNotification (in CoreFoundation) 14 0x9872d098 -[NSNotificationCenter postNotificationName:object:userInfo:] (in Foundation) 15 0x9873a475 -[NSNotificationCenter postNotificationName:object:] (in Foundation) 16 0x98af1de2 -[NSTableView _enableSelectionPostingAndPost] (in AppKit) 17 0x98bd11d0 -[NSTableView mouseDown:] (in AppKit) 18 0x98bcfeea -[NSOutlineView mouseDown:] (in AppKit) 19 0x007596c3 -[PBXExtendedOutlineView mouseDown:] (in DevToolsInterface) 20 0x98b6e548 -[NSWindow sendEvent:] (in AppKit) 21 0x00757a06 -[XCWindow sendEvent:] (in DevToolsInterface) 22 0x98a871af -[NSApplication sendEvent:] (in AppKit) 23 0x006f6dec -[PBXExtendedApplication sendEvent:] (in DevToolsInterface) 24 0x98a1ac4f -[NSApplication run] (in AppKit) 25 0x98a12c85 NSApplicationMain (in AppKit) 26 0x0000eee1 27 0x000021a5 If you would like to take a look at the project I'm working on, here is a link to download my xcodeproject: Tea Timer.zip To recreate my problem, open Timer.h, attempt to refactor timeField to minuteField, use the preview function of refactor and then select Timer.m, to look at the changes supposedly made within. It will then raise this error without editing the file.

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  • How to Create Deterministic Guids

    - by desigeek
    In our application we are creating Xml files with an attribute that has a Guid value. This value needed to be consistent between file upgrades. So even if everything else in the file changes, the guid value for the attribute should remain the same. One obvious solution was to create a static dictionary with the filename and the Guids to be used for them. Then whenever we generate the file, we look up the dictionary for the filename and use the corresponding guid. But this is not feasible coz we might scale to 100's of files and didnt want to maintain big list of guids. So another approach was to make the Guid the same based on the path of the file. Since our file paths and application directory structure are unique, the Guid should be unique for that path. So each time we run an upgrade, the file gets the same guid based on its path. I found one cool way to generate such 'Deterministic Guids' (Thanks Elton Stoneman). It basically does this: private Guid GetDeterministicGuid(string input) { //use MD5 hash to get a 16-byte hash of the string: MD5CryptoServiceProvider provider = new MD5CryptoServiceProvider(); byte[] inputBytes = Encoding.Default.GetBytes(input); byte[] hashBytes = provider.ComputeHash(inputBytes); //generate a guid from the hash: Guid hashGuid = new Guid(hashBytes); return hashGuid; } So given a string, the Guid will always be the same. Are there any other approaches or recommended ways to doing this? What are the pros or cons of that method?

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  • Pin animatesDrop mapView-iOS

    - by user1724168
    I have implemented code as seen below. I would like to add animation with dropping effect. However, once I type pinView.animatesDrop does not recognize! I could not able to figure out what I am doing wrong? - (MKAnnotationView *)mapView:(MKMapView *)mV viewForAnnotation:(id <MKAnnotation>)annotation { MKAnnotationView *pinView=nil; if(![annotation isKindOfClass:[Annotation class]]) // Don't mess user location return nil; static NSString *defaultPinID = @"StandardIdentifier"; pinView = (MKAnnotationView *)[self.mapView dequeueReusableAnnotationViewWithIdentifier:defaultPinID]; if (pinView == nil){ pinView = [[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:defaultPinID]; } // Build our annotation if ([annotation isKindOfClass:[Annotation class]]) { Annotation *a = (Annotation *)annotation; pinView.image = [ZSPinAnnotation pinAnnotationWithColor:a.color];// ZSPinAnnotation Being Used pinView.annotation = a; pinView.enabled = YES; pinView.centerOffset=CGPointMake(6.5,-16); pinView.calloutOffset = CGPointMake(-11,0); //pinView.animatesDrop = YES; } pinView.canShowCallout = YES; UIButton *rightButton = [UIButton buttonWithType:UIButtonTypeDetailDisclosure]; [rightButton setTitle:annotation.title forState:UIControlStateNormal]; [pinView setRightCalloutAccessoryView:rightButton]; pinView.leftCalloutAccessoryView = [[UIView alloc] init]; pinView.leftCalloutAccessoryView=nil; /*UIButton *leftButton = [UIButton buttonWithType:UIButtonTypeInfoLight]; [leftButton setTitle:annotation.title forState:UIControlStateNormal]; [pinView setLeftCalloutAccessoryView:leftButton];*/ return pinView; }

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  • Help with creating a custom ItemRenderer for Flex 4

    - by elmonty
    I'm trying to create a custom ItemRenderer for a TileList in Flex 4. Here's my renderer: <?xml version="1.0" encoding="utf-8"?> <s:ItemRenderer xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/mx" autoDrawBackground="true"> <mx:Image x="0" y="0" source="../images/blank-offer.png" width="160" height="144" smoothBitmapContent="true"/> <s:Label x="5" y="20" text="{data.title}" fontFamily="Verdana" fontSize="16" color="#696565" width="155"/> <s:Label x="5" y="42" text="{data.description}" fontFamily="Verdana" fontSize="8" color="#696565" width="154"/> <mx:Text x="3" y="59" text="{data.details}" fontFamily="Verdana" fontSize="8" color="#696565" width="157" height="65"/> <mx:Text x="3" y="122" text="{data.disclaimer}" fontFamily="Verdana" fontSize="5" color="#696565" width="157" height="21"/> </s:ItemRenderer> Here's my tile list: <mx:TileList x="0" y="0" width="100%" height="100%" id="tileList" creationComplete="tileList_creationCompleteHandler(event)" dataProvider="{getDataResult.lastResult}" labelField="title" itemRenderer="renderers.OfferLibraryListRenderer"></mx:TileList> When I run the app, I get this error: Error #1034: Type Coercion failed: cannot convert renderers::OfferLibraryListRenderer@32fce0a1 to mx.controls.listClasses.IListItemRenderer.

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  • Getting error: "This webpage is not available" for my chrome app's options page

    - by Don Rhummy
    My CRX had the proper html page options.html in it, the manifest declares it properly (it shows up as a link on the chrome://extensions page) but when I click that link, Chrome gives the error: This webpage is not available The webpage at chrome-extension://invalid/ might be temporarily down or it may have moved permanently to a new web address. It says "invalid" but the app runs perfectly well (all the content scripts run, the background created a database and saved to it). Why would it show as invalid? Why doesn't it have the extensions' id? Here's the manifest: { "manifest_version": 2, "name": "MyAPP", "description": "My App", "version": "0.0.0.32", "minimum_chrome_version": "27", "offline_enabled": true, "options_page": "options.html", "icons": { "16": "images/icon16.png", "48": "images/icon48.png", "128": "images/icon128.png" }, "app": { "background": { "scripts": [ "scripts/background.js" ] } }, "permissions": [ "unlimitedStorage", "fullscreen", { "fileSystem": [ "write" ] }, "background", "<all_urls>", "tabs" ] } Does it need to be declared in "web_accessible_resources"? Any idea what's wrong? Update Adding to "web_accessible_resources" does not fix the issue. I added everything on that page too. update 2 It looks like it might be a Chrome bug for packaged apps. When I remove the "app" section in the manifest, it works! This is a bug since the Chrome app documentation states that apps can have options pages: https://developer.chrome.com/apps/options.html

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  • asp.net mvc formcollection

    - by mazhar
    public ActionResult Edit(int id, FormCollection formValues) { 07. 08. // Retrieve existing dinner 09. Dinner dinner = dinnerRepository.GetDinner(id); 10. 11. // Update dinner with form posted values 12. dinner.Title = Request.Form["Title"]; 13. dinner.Description = Request.Form["Description"]; 14. dinner.EventDate = DateTime.Parse(Request.Form["EventDate"]); 15. dinner.Address = Request.Form["Address"]; 16. dinner.Country = Request.Form["Country"]; 17. dinner.ContactPhone = Request.Form["ContactPhone"]; 18. 19. // Persist changes back to database 20. dinnerRepository.Save(); 21. 22. // Perform HTTP redirect to details page for the saved Dinner 23. return RedirectToAction("Details", new { id = dinner.DinnerID }); 24.} formValues is not used in any form, what is the used of it.

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  • Compile C++ file as objective-c++ using makefile

    - by Vikas
    I'm trying to compile .cpp files as objective-c++ using makefile as few of my cpp file have objective code. I added -x objective-c++ as complier option and started getting stray /327 in program error( and lots of similar error with different numbers after /). The errors are around 200. But when I change the encoding of the file from unicode-8 to 16 the error reduces to 23. currently there is no objective-c++ code in the .cpp file but plan to add in future. When i remove -x objective-c++ from complier option ,everything complies fine. and .out is generated. I would be helpful if someone will tell me why this is happening and even a solution for the same Thanks in advance example of my makefile <code> MACHINE= $(shell uname -s) CFLAGS?=-w -framework CoreServices -framework ApplicationServices -framework CoreFoundation -framework CoreWLAN -framework Cocoa -framework Foundation ifeq ($(MACHINE),Darwin) CCLINK?= -lpthread else CCLINK?= -lpthread -lrt endif DEBUG?= -g -rdynamic -ggdb CCOPT= $(CFLAGS) $(ARCH) $(PROF) CC =g++ -x objective-c++ AR = ar rcs #lib name SLIB_NAME=myapplib EXENAME = myapp.out OBJDIR = build OBJLIB := $(addprefix $(OBJDIR)/... all .o files) SS_OBJ := $(addprefix $(OBJDIR)/,myapp.o ) vpath %.cpp path to my .cpp files INC = include files subsystem: make all $(OBJLIB) : |$(OBJDIR) $(OBJDIR): mkdir $(OBJDIR) $(OBJDIR)/%.o:%.cpp $(CC) -c $(INC) $(CCOPT) $(DEBUG) $(CCLINK) $< -o $@ all: $(OBJLIB) $(CLI_OBJ) $(SS_OBJ) $(AR) lib$(SLIB_NAME).a $(OBJLIB) $(CC) $(INC) $(CCOPT) $(SS_OBJ) $(DEBUG) $(CCLINK) -l$(SLIB_NAME) -L ./ -o $(OBJDIR)/$(EXENAME) clean: rm -rf $(OBJDIR)/* dep: $(CC) -MM *.cpp </code>

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  • program "is not up to date" execution error in wedit lcc-win32

    - by Rowhawn
    I'm attempting to compile a simple hello world program in c with lcc-win32/wedit, and i'm a little unfamiliar with windows c programming. #include int main(void){ printf("hellow\n"); return 0; } When I compile the program the console output is Wedit output window build: Tue Jun 15 09:13:17 2010 c:\lcc\lib\lcccrt0.obj .text: undefined reference to '_RtlUnwind@16' c:\lcc\lib\lcccrt0.obj .text: undefined reference to '_signal' c:\lcc\lib\lcccrt0.obj .text: undefined reference to '_raise' c:\lcc\lib\lcccrt0.obj .text: undefined reference to '_exit' asctoq.obj .text: undefined reference to '_strnicmp' defaulttrap.obj .text: undefined reference to 'imp_iob' defaulttrap.obj .text: undefined reference to '_fwrite' defaulttrap.obj .text: undefined reference to '_itoa' defaulttrap.obj .text: undefined reference to '_strcat' defaulttrap.obj .text: undefined reference to '_MessageBoxA@16' defaulttrap.obj .text: undefined reference to '_abort' powlasm.obj .text: undefined reference to '_pow' qfloat.obj .text: undefined reference to '_memset' qfloat.obj .text: undefined reference to '_strchr' qfloat.obj .text: undefined reference to '_memmove' strlcpy.obj .text: undefined reference to '_memcpy' xprintf.obj .text: undefined reference to '_localeconv' xprintf.obj .text: undefined reference to '_strtol' xprintf.obj .text: undefined reference to '_wcslen' xprintf.obj .text: undefined reference to '_wctomb' xprintf.obj .text: undefined reference to '_fputc' search Compilation + link time:0.1 sec, Return code: 60 when I attempt to execute the program within wedit i get a dialog box that says "hello.exe is not up-to-date. Rebuild?" If I click yes, nothing happens. If I click no, a dos window pops up saying "C:\lcc\projects\lcc2\hello.exe" Return code -1 Execution time 0.001 seconds Press any key to continue... This continues to happen no matter how many times i compile/rebuild. Any ideas?

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  • Drawing Color Spectrum with Waveform

    - by TheDarkIn1978
    i've come across this ActionScript sample, which demonstrates drawing of the color spectrum, one line at a time via a loop, using waveforms. however, the waveform location of each RGB channel create a color spectrum that is missing colors (pure yellow, cyan and magenta) and therefore the spectrum is incomplete. how can i remedy this problem so that the drawn color spectrum will exhibit all colors? // Loop through all of the pixels from '0' to the specified width. for(var i:int = 0; i < nWidth; i++) { // Calculate the color percentage based on the current pixel. nColorPercent = i / nWidth; // Calculate the radians of the angle to use for rotating color values. nRadians = (-360 * nColorPercent) * (Math.PI / 180); // Calculate the RGB channels based on the angle. nR = Math.cos(nRadians) * 127 + 128 << 16; nG = Math.cos(nRadians + 2 * Math.PI / 3) * 127 + 128 << 8; nB = Math.cos(nRadians + 4 * Math.PI / 3) * 127 + 128; // OR the individual color channels together. nColor = nR | nG | nB; }

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  • I set up better-edit-in-place but still cannot edit in place in Rails

    - by Angela
    I installed the plugin better-edit-in-place (http://github.com/nakajima/better-edit-in-place) but I dont' seem to be able to make it work. When I use firebug, it is rendering the value to be edited correctly: <span rel="/emails/1" id="email_1_days" class="editable">7</span> And it is showing the full javascript which should work on class editable: var Editable = Class.create({ 5 initialize: function(element, options) { 6 this.element = $(element); 7 Object.extend(this, options); 8 9 // Set default values for options 10 this.editField = this.editField || {}; 11 this.editField.type = this.editField.type || 'input'; 12 this.onLoading = this.onLoading || Prototype.emptyFunction; 13 this.onComplete = this.onComplete || Prototype.emptyFunction; 14 15 this.field = this.parseField(); 16 this.value = this.element.innerHTML; 17 18 this.setupForm(); 19 this.setupBehaviors(); 20 }, 21 22 // In order to parse the field correctly, it's necessary that the element 23 // you want to edit in place for have an id of (model_name)_(id)_(field_name). 24 // For example, if you want to edit the "caption" field in a "Photo" model, 25 // your id should be something like "photo_#{@photo.id}_caption". 26 // If you want to edit the "comment_body" field in a "MemberBlogPost" model, 27 // it would be: "member_blog_post_#{@member_blog_post.id}_comment_body" 28 parseField: function() { 29 var matches = this.element.id.match(/(.*)_\d*_(.*)/); 30 this.modelName = matches[1]; 31 this.fieldName = matches[2]; 32 if (this.editField.foreignKey) this.fieldName += '_id'; 33 return this.modelName + '[' + this.fieldName + ']'; 34 }, But when I point my mouse at the element, no in-place-editing action!

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  • iPhone app crashes on start-up, in stack-trace only messages from built-in frameworks

    - by Aleksejs
    My app some times crashes at start-up. In stack-trace only messages from built-in frameworks. An excerpt from a crash log: OS Version: iPhone OS 3.1.3 (7E18) Report Version: 104 Exception Type: EXC_BAD_ACCESS (SIGBUS) Exception Codes: KERN_PROTECTION_FAILURE at 0x000e6000 Crashed Thread: 0 Thread 0 Crashed: 0 CoreGraphics 0x339305d8 argb32_image_mark_RGB32 + 704 1 CoreGraphics 0x338dbcd4 argb32_image + 1640 2 libRIP.A.dylib 0x320d99f0 ripl_Mark 3 libRIP.A.dylib 0x320db3ac ripl_BltImage 4 libRIP.A.dylib 0x320cc2a0 ripc_RenderImage 5 libRIP.A.dylib 0x320d5238 ripc_DrawImage 6 CoreGraphics 0x338d7da4 CGContextDelegateDrawImage + 80 7 CoreGraphics 0x338d7d14 CGContextDrawImage + 364 8 UIKit 0x324ee68c compositeCGImageRefInRect 9 UIKit 0x324ee564 -[UIImage(UIImageDeprecated) compositeToRect:fromRect:operation:fraction:] 10 UIKit 0x32556f44 -[UINavigationBar drawBackButtonBackgroundInRect:withStyle:pressed:] 11 UIKit 0x32556b00 -[UINavigationItemButtonView drawRect:] 12 UIKit 0x324ecbc4 -[UIView(CALayerDelegate) drawLayer:inContext:] 13 QuartzCore 0x311cacfc -[CALayer drawInContext:] 14 QuartzCore 0x311cab00 backing_callback 15 QuartzCore 0x311ca388 CABackingStoreUpdate 16 QuartzCore 0x311c978c -[CALayer _display] 17 QuartzCore 0x311c941c -[CALayer display] 18 QuartzCore 0x311c9368 CALayerDisplayIfNeeded 19 QuartzCore 0x311c8848 CA::Context::commit_transaction(CA::Transaction*) 20 QuartzCore 0x311c846c CA::Transaction::commit() 21 QuartzCore 0x311c8318 +[CATransaction flush] 22 UIKit 0x324f5e94 -[UIApplication _reportAppLaunchFinished] 23 UIKit 0x324a7a80 -[UIApplication _runWithURL:sourceBundleID:] 24 UIKit 0x324f8df8 -[UIApplication handleEvent:withNewEvent:] 25 UIKit 0x324f8634 -[UIApplication sendEvent:] 26 UIKit 0x324f808c _UIApplicationHandleEvent 27 GraphicsServices 0x335067dc PurpleEventCallback 28 CoreFoundation 0x323f5524 CFRunLoopRunSpecific 29 CoreFoundation 0x323f4c18 CFRunLoopRunInMode 30 UIKit 0x324a6c00 -[UIApplication _run] 31 UIKit 0x324a5228 UIApplicationMain 32 Journaler 0x000029ac main (main.m:14) 33 Journaler 0x00002948 start + 44 File main.m is simple as possible: #import <UIKit/UIKit.h> int main(int argc, char *argv[]) { NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; int retVal = UIApplicationMain(argc, argv, nil, nil); // line 14 [pool release]; return retVal; } What my cause the app to crash?

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