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• Nested functions are disabled - why do I get this error message?

  - by Casebash

  When I accidentally wrote: UIViewController tmp*=_currentViewController; Instead of: UIViewController *tmp=_currentViewController; I get a nested functions are disabled error. Can you explain this?

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• Why "\d+{1,4}(?:[.,]\d{1,4})?" in RegularExpressionValidator throws Exception: "Nested quantifier {"

  - by abatishchev

  I have asp:RegularExpressionValidator with ValidationExpression="\d+{1,4}(?:[.,]\d{1,4})?" but it doesn't' work, parser throws ArgumentException: parsing "\d+{1,4}(?:[.,]\d{1,4})?" - Nested quantifier {. Where is my mistake? I want to allow strings like xxxx,xxxx - from 1 to 4 digits and decimal digits are not required, e.g.: 1000, 99,99, 0,2498, etc.

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• How do I join the values of nested Python dictionary?

  - by alex

  Suppose I have a dictionary, and it's nested with dictionaries inside. I want to join all the values of that dictionary, recursively? ' '.join(d.values()) That works if there are no nests.

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• 2D Grid Map Connectivity Check (avoiding stack overflow)

  - by SombreErmine

  I am trying to create a routine in C++ that will run before a more expensive A* algorithm that checks to see if two nodes on a 2D grid map are connected or not. What I need to know is a good way to accomplish this sequentially rather than recursively to avoid overflowing the stack. What I've Done Already I've implemented this with ease using a recursive algorithm; however, depending upon different situations it will generate a stack overflow. Upon researching this, I've come to the conclusion that it is overflowing the stack because of too many recursive function calls. I am sure that my recursion does not enter an infinite loop. I generate connected sets at the beginning of the level, and then I use those connected sets to determine connectivity on the fly later. Basically, the generating algorithm starts from left-to-right top-to-bottom. It skips wall nodes and marks them as visited. Whenever it reaches a walkable node, it recursively checks in all four cardinal directions for connected walkable nodes. Every node that gets checked is marked as visited so they aren't handled twice. After checking a node, it is added to either a walls set, a doors set, or one of multiple walkable nodes sets. Once it fills that area, it continues the original ltr ttb loop skipping already-visited nodes. I've also looked into flood-fill algorithms, but I can't make sense of the sequential algorithms and how to adapt them. Can anyone suggest a better way to accomplish this without causing a stack overflow? The only way I can think of is to do the left-to-right top-to-bottom loop generating connected sets on a row basis. Then check the previous row to see if any of the connected sets are connected and then join the sets that are. I haven't decided on the best data structures to use for that though. I also just thought about having the connected sets pre-generated outside the game, but I wouldn't know where to start with creating a tool for that. Any help is appreciated. Thanks!

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• T-SQL Improvements And Data Types in ms sql 2008

  - by Aamir Hasan

   Microsoft SQL Server 2008 is a new version released in the first half of 2008 introducing new properties and capabilities to SQL Server product family. All these new and enhanced capabilities can be defined as the classic words like secure, reliable, scalable and manageable. SQL Server 2008 is secure. It is reliable. SQL2008 is scalable and is more manageable when compared to previous releases. Now we will have a look at the features that are making MS SQL Server 2008 more secure, more reliable, more scalable, etc. in details.Microsoft SQL Server 2008 provides T-SQL enhancements that improve performance and reliability. Itzik discusses composable DML, the ability to declare and initialize variables in the same statement, compound assignment operators, and more reliable object dependency information. Table-Valued ParametersInserts into structures with 1-N cardinality problematicOne order -> N order line items"N" is variable and can be largeDon't want to force a new order for every 20 line itemsOne database round-trip / line item slows things downNo ARRAY data type in SQL ServerXML composition/decomposition used as an alternativeTable-valued parameters solve this problemTable-Valued ParametersSQL Server has table variablesDECLARE @t TABLE (id int);SQL Server 2008 adds strongly typed table variablesCREATE TYPE mytab AS TABLE (id int);DECLARE @t mytab;Parameters must use strongly typed table variables Table Variables are Input OnlyDeclare and initialize TABLE variable  DECLARE @t mytab;  INSERT @t VALUES (1), (2), (3);  EXEC myproc @t;Procedure must declare variable READONLY  CREATE PROCEDURE usetable (    @t mytab READONLY ...)  AS    INSERT INTO lineitems SELECT * FROM @t;    UPDATE @t SET... -- no!T-SQL Syntax EnhancementsSingle statement declare and initialize  DECLARE @iint = 4;Compound Assignment Operators  SET @i += 1;Row constructors  DECLARE @t TABLE (id int, name varchar(20));  INSERT INTO @t VALUES    (1, 'Fred'), (2, 'Jim'), (3, 'Sue');Grouping SetsGrouping Sets allow multiple GROUP BY clauses in a single SQL statementMultiple, arbitrary, sets of subtotalsSingle read pass for performanceNested subtotals provide ever better performanceGrouping Sets are an ANSI-standardCOMPUTE BY is deprecatedGROUPING SETS, ROLLUP, CUBESQL Server 2008 - ANSI-syntax ROLLUP and CUBEPre-2008 non-ANSI syntax is deprecatedWITH ROLLUP produces n+1 different groupings of datawhere n is the number of columns in GROUP BYWITH CUBE produces 2^n different groupingswhere n is the number of columns in GROUP BYGROUPING SETS provide a "halfway measure"Just the number of different groupings you needGrouping Sets are visible in query planGROUPING_ID and GROUPINGGrouping Sets can produce non-homogeneous setsGrouping set includes NULL values for group membersNeed to distinguish by grouping and NULL valuesGROUPING (column expression) returns 0 or 1Is this a group based on column expr. or NULL value?GROUPING_ID (a,b,c) is a bitmaskGROUPING_ID bits are set based on column expressions a, b, and cMERGE StatementMultiple set operations in a single SQL statementUses multiple sets as inputMERGE target USING source ON ...Operations can be INSERT, UPDATE, DELETEOperations based onWHEN MATCHEDWHEN NOT MATCHED [BY TARGET] WHEN NOT MATCHED [BY SOURCE]More on MERGEMERGE statement can reference a $action columnUsed when MERGE used with OUTPUT clauseMultiple WHEN clauses possible For MATCHED and NOT MATCHED BY SOURCEOnly one WHEN clause for NOT MATCHED BY TARGETMERGE can be used with any table sourceA MERGE statement causes triggers to be fired onceRows affected includes total rows affected by all clausesMERGE PerformanceMERGE statement is transactionalNo explicit transaction requiredOne Pass Through TablesAt most a full outer joinMatching rows = when matchedLeft-outer join rows = when not matched by targetRight-outer join rows = when not matched by sourceMERGE and DeterminismUPDATE using a JOIN is non-deterministicIf more than one row in source matches ON clause, either/any row can be used for the UPDATEMERGE is deterministicIf more than one row in source matches ON clause, its an errorKeeping Track of DependenciesNew dependency views replace sp_dependsViews are kept in sync as changes occursys.dm_sql_referenced_entitiesLists all named entities that an object referencesExample: which objects does this stored procedure use?sys.dm_sql_referencing_entities 

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• Frameworks: "A Ride at the OK (or Cancel) Corral"

  Configure nested transactions using Oracle ADF task flows.

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• Using PHP substr() and strip_tags() while retaining formatting and without breaking HTML

  - by Peter

  I have various HTML strings to cut to 100 characters (of the stripped content, not the original) without stripping tags and without breaking HTML. Original HTML string (288 characters): $content = "<div>With a <span class='spanClass'>span over here</span> and a <div class='divClass'>nested div over <div class='nestedDivClass'>there</div> </div> and a lot of other nested <strong><em>texts</em> and tags in the air <span>everywhere</span>, it's a HTML taggy kind of day.</strong></div>"; When trimming to 100 characters HTML breaks and stripped content comes to about 40 characters: $content = substr($content, 0, 100)."..."; /* output: <div>With a <span class='spanClass'>span over here</span> and a <div class='divClass'>nested div ove... */ Stripping HTML gives the correct character count but obviously looses formatting: $content = substr(strip_tags($content)), 0, 100)."..."; /* output: With a span over here and a nested div over there and a lot of other nested texts and tags in the ai... */ Challenge: To output the character count of strip_tags while retaining HTML formatting and on closing the string finish any started tags: /* <div>With a <span class='spanClass'>span over here</span> and a <div class='divClass'>nested div over <div class='nestedDivClass'>there</div> </div> and a lot of other nested <strong><em>texts</em> and tags in the ai</strong></div>..."; Similar question (less strict on solution provided so far)

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• ASP.NET MVC2 - Does Html.EnableClientValidation() work on the nested data model?

  - by warmcold

  I have seen the client side validation examples and videos on internet by using Html.EnableClientValidation(). But all target on the simple data model. Does the Html.EnableClientValidation() work on the nested data model like below? public class Person { public Name Name { get; set; } public string Gender { get; set; } } public class Name { public string First { get; set; } public string Last { get; set; } }

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• XML-RPC with PHP and GoDaddy? Confusion sets in.

  - by Chris Cooper

  Hey folks, I am attempting to work with XML-RPC via PHP on a GoDaddy server. This same server is hosting a Wordpress Blog that makes use of XML-RPC and is functioning, though that may be unrelated... Whenever I attempt to use any functions that are integrated into PHP for use with XML-RPC, I get an error (function list here: http://us3.php.net/manual/en/ref.xmlrpc.php) e.g.: Fatal error: Class 'xmlrpc_client' not found Is this because XML-RPC's PHP functions are not enabled on my server? If so, how do I go about enabling those - it would seem I would have to install the XML-RPC library to do so and of course I cannot do that on a shared server. Doesn't Wordpress use the same batch of XML-RPC functions though (it works fine)? I think I have managed to thoroughly confuse myself. I have zero experience with XML-RPC.

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• What URL scheme would be better for "nested" resources in a RESTful application?

  - by Luke404

  Let's say we want a RESTful web service to manage some logically nested resources, where each instance of resource 'B' is logically contained by an instance of resource 'A'. The first example that comes to mind, working as a sysadmin, is email accounts and their domains: [email protected] [email protected] [email protected] ... What URL scheme would you suggest? At first I'd try: /domain/[domainname] /domain/[domainname]/account/[accountname] is that in line with RESTful principles? or should I go with something like: /domain/[domainname] /account/[account@domainname]/ or anything else?

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• Why is this giving me 2 different sets of timezones?

  - by chobo2

  Hi I have this line to get all the timezones Dictionary<string, TimeZoneInfo> storeZoneName = TimeZoneInfo.GetSystemTimeZones().ToDictionary(z => z.DisplayName); Now when I upload I try it on my local machine I get this (UTC-12:00) International Date Line West (UTC-11:00) Coordinated Universal Time-11 (UTC-11:00) Samoa (UTC-10:00) Hawaii (UTC-09:00) Alaska (UTC-08:00) Baja California (UTC-08:00) Pacific Time (US & Canada) (UTC-07:00) Arizona (UTC-07:00) Chihuahua, La Paz, Mazatlan (UTC-07:00) Mountain Time (US & Canada) (UTC-06:00) Central America (UTC-06:00) Central Time (US & Canada) (UTC-06:00) Guadalajara, Mexico City, Monterrey (UTC-06:00) Saskatchewan (UTC-05:00) Bogota, Lima, Quito (UTC-05:00) Eastern Time (US & Canada) (UTC-05:00) Indiana (East) (UTC-04:30) Caracas (UTC-04:00) Asuncion (UTC-04:00) Atlantic Time (Canada) (UTC-04:00) Cuiaba (UTC-04:00) Georgetown, La Paz, Manaus, San Juan (UTC-04:00) Santiago (UTC-03:30) Newfoundland (UTC-03:00) Brasilia (UTC-03:00) Buenos Aires (UTC-03:00) Cayenne, Fortaleza (UTC-03:00) Greenland (UTC-03:00) Montevideo (UTC-02:00) Coordinated Universal Time-02 (UTC-02:00) Mid-Atlantic (UTC-01:00) Azores (UTC-01:00) Cape Verde Is. (UTC) Casablanca (UTC) Coordinated Universal Time (UTC) Dublin, Edinburgh, Lisbon, London (UTC) Monrovia, Reykjavik (UTC+01:00) Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna (UTC+01:00) Belgrade, Bratislava, Budapest, Ljubljana, Prague (UTC+01:00) Brussels, Copenhagen, Madrid, Paris (UTC+01:00) Sarajevo, Skopje, Warsaw, Zagreb (UTC+01:00) West Central Africa (UTC+02:00) Amman (UTC+02:00) Athens, Bucharest, Istanbul (UTC+02:00) Beirut (UTC+02:00) Cairo (UTC+02:00) Harare, Pretoria (UTC+02:00) Helsinki, Kyiv, Riga, Sofia, Tallinn, Vilnius (UTC+02:00) Jerusalem (UTC+02:00) Minsk (UTC+02:00) Windhoek (UTC+03:00) Baghdad (UTC+03:00) Kuwait, Riyadh (UTC+03:00) Moscow, St. Petersburg, Volgograd (UTC+03:00) Nairobi (UTC+03:30) Tehran (UTC+04:00) Abu Dhabi, Muscat (UTC+04:00) Baku (UTC+04:00) Port Louis (UTC+04:00) Tbilisi (UTC+04:00) Yerevan (UTC+04:30) Kabul (UTC+05:00) Ekaterinburg (UTC+05:00) Islamabad, Karachi (UTC+05:00) Tashkent (UTC+05:30) Chennai, Kolkata, Mumbai, New Delhi (UTC+05:30) Sri Jayawardenepura (UTC+05:45) Kathmandu (UTC+06:00) Astana (UTC+06:00) Dhaka (UTC+06:00) Novosibirsk (UTC+06:30) Yangon (Rangoon) (UTC+07:00) Bangkok, Hanoi, Jakarta (UTC+07:00) Krasnoyarsk (UTC+08:00) Beijing, Chongqing, Hong Kong, Urumqi (UTC+08:00) Irkutsk (UTC+08:00) Kuala Lumpur, Singapore (UTC+08:00) Perth (UTC+08:00) Taipei (UTC+08:00) Ulaanbaatar (UTC+09:00) Osaka, Sapporo, Tokyo (UTC+09:00) Seoul (UTC+09:00) Yakutsk (UTC+09:30) Adelaide (UTC+09:30) Darwin (UTC+10:00) Brisbane (UTC+10:00) Canberra, Melbourne, Sydney (UTC+10:00) Guam, Port Moresby (UTC+10:00) Hobart (UTC+10:00) Vladivostok (UTC+11:00) Magadan, Solomon Is., New Caledonia (UTC+12:00) Auckland, Wellington (UTC+12:00) Coordinated Universal Time+12 (UTC+12:00) Fiji (UTC+12:00) Petropavlovsk-Kamchatsky (UTC+13:00) Nuku'alofa When I run it on a different local machine or my server I have this. <option value="(GMT) Casablanca">(GMT) Casablanca</option> <option value="(GMT) Greenwich Mean Time : Dublin, Edinburgh, Lisbon, London">(GMT) Greenwich Mean Time : Dublin, Edinburgh, Lisbon, London</option> <option value="(GMT) Monrovia, Reykjavik">(GMT) Monrovia, Reykjavik</option> <option value="(GMT+01:00) Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna">(GMT+01:00) Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna</option> <option value="(GMT+01:00) Belgrade, Bratislava, Budapest, Ljubljana, Prague">(GMT+01:00) Belgrade, Bratislava, Budapest, Ljubljana, Prague</option> <option value="(GMT+01:00) Brussels, Copenhagen, Madrid, Paris">(GMT+01:00) Brussels, Copenhagen, Madrid, Paris</option> <option value="(GMT+01:00) Sarajevo, Skopje, Warsaw, Zagreb">(GMT+01:00) Sarajevo, Skopje, Warsaw, Zagreb</option> <option value="(GMT+01:00) West Central Africa">(GMT+01:00) West Central Africa</option> <option value="(GMT+02:00) Amman">(GMT+02:00) Amman</option> <option value="(GMT+02:00) Athens, Bucharest, Istanbul">(GMT+02:00) Athens, Bucharest, Istanbul</option> <option value="(GMT+02:00) Beirut">(GMT+02:00) Beirut</option> <option value="(GMT+02:00) Cairo">(GMT+02:00) Cairo</option> <option value="(GMT+02:00) Harare, Pretoria">(GMT+02:00) Harare, Pretoria</option> <option value="(GMT+02:00) Helsinki, Kyiv, Riga, Sofia, Tallinn, Vilnius">(GMT+02:00) Helsinki, Kyiv, Riga, Sofia, Tallinn, Vilnius</option> <option value="(GMT+02:00) Jerusalem">(GMT+02:00) Jerusalem</option> <option value="(GMT+02:00) Minsk">(GMT+02:00) Minsk</option> <option value="(GMT+02:00) Windhoek">(GMT+02:00) Windhoek</option> <option value="(GMT+03:00) Baghdad">(GMT+03:00) Baghdad</option> <option value="(GMT+03:00) Kuwait, Riyadh">(GMT+03:00) Kuwait, Riyadh</option> <option value="(GMT+03:00) Moscow, St. Petersburg, Volgograd">(GMT+03:00) Moscow, St. Petersburg, Volgograd</option> <option value="(GMT+03:00) Nairobi">(GMT+03:00) Nairobi</option> <option value="(GMT+03:00) Tbilisi">(GMT+03:00) Tbilisi</option> <option value="(GMT+03:30) Tehran">(GMT+03:30) Tehran</option> <option value="(GMT+04:00) Abu Dhabi, Muscat">(GMT+04:00) Abu Dhabi, Muscat</option> <option value="(GMT+04:00) Baku">(GMT+04:00) Baku</option> <option value="(GMT+04:00) Port Louis">(GMT+04:00) Port Louis</option> <option value="(GMT+04:00) Yerevan">(GMT+04:00) Yerevan</option> <option value="(GMT+04:30) Kabul">(GMT+04:30) Kabul</option> <option value="(GMT+05:00) Ekaterinburg">(GMT+05:00) Ekaterinburg</option> <option value="(GMT+05:00) Islamabad, Karachi">(GMT+05:00) Islamabad, Karachi</option> <option value="(GMT+05:00) Tashkent">(GMT+05:00) Tashkent</option> <option value="(GMT+05:30) Chennai, Kolkata, Mumbai, New Delhi">(GMT+05:30) Chennai, Kolkata, Mumbai, New Delhi</option> <option value="(GMT+05:30) Sri Jayawardenepura">(GMT+05:30) Sri Jayawardenepura</option> <option value="(GMT+05:45) Kathmandu">(GMT+05:45) Kathmandu</option> <option value="(GMT+06:00) Almaty, Novosibirsk">(GMT+06:00) Almaty, Novosibirsk</option> <option value="(GMT+06:00) Astana, Dhaka">(GMT+06:00) Astana, Dhaka</option> <option value="(GMT+06:30) Yangon (Rangoon)">(GMT+06:30) Yangon (Rangoon)</option> <option value="(GMT+07:00) Bangkok, Hanoi, Jakarta">(GMT+07:00) Bangkok, Hanoi, Jakarta</option> <option value="(GMT+07:00) Krasnoyarsk">(GMT+07:00) Krasnoyarsk</option> <option value="(GMT+08:00) Beijing, Chongqing, Hong Kong, Urumqi">(GMT+08:00) Beijing, Chongqing, Hong Kong, Urumqi</option> <option value="(GMT+08:00) Irkutsk, Ulaan Bataar">(GMT+08:00) Irkutsk, Ulaan Bataar</option> <option value="(GMT+08:00) Kuala Lumpur, Singapore">(GMT+08:00) Kuala Lumpur, Singapore</option> <option value="(GMT+08:00) Perth">(GMT+08:00) Perth</option> <option value="(GMT+08:00) Taipei">(GMT+08:00) Taipei</option> <option value="(GMT+09:00) Osaka, Sapporo, Tokyo">(GMT+09:00) Osaka, Sapporo, Tokyo</option> <option value="(GMT+09:00) Seoul">(GMT+09:00) Seoul</option> <option value="(GMT+09:00) Yakutsk">(GMT+09:00) Yakutsk</option> <option value="(GMT+09:30) Adelaide">(GMT+09:30) Adelaide</option> <option value="(GMT+09:30) Darwin">(GMT+09:30) Darwin</option> <option value="(GMT+10:00) Brisbane">(GMT+10:00) Brisbane</option> <option value="(GMT+10:00) Canberra, Melbourne, Sydney">(GMT+10:00) Canberra, Melbourne, Sydney</option> <option value="(GMT+10:00) Guam, Port Moresby">(GMT+10:00) Guam, Port Moresby</option> <option value="(GMT+10:00) Hobart">(GMT+10:00) Hobart</option> <option value="(GMT+10:00) Vladivostok">(GMT+10:00) Vladivostok</option> <option value="(GMT+11:00) Magadan, Solomon Is., New Caledonia">(GMT+11:00) Magadan, Solomon Is., New Caledonia</option> <option value="(GMT+12:00) Auckland, Wellington">(GMT+12:00) Auckland, Wellington</option> <option value="(GMT+12:00) Fiji, Kamchatka, Marshall Is.">(GMT+12:00) Fiji, Kamchatka, Marshall Is.</option> <option value="(GMT+13:00) Nuku'alofa">(GMT+13:00) Nuku'alofa</option> <option value="(GMT-01:00) Azores">(GMT-01:00) Azores</option> <option value="(GMT-01:00) Cape Verde Is.">(GMT-01:00) Cape Verde Is.</option> <option value="(GMT-02:00) Mid-Atlantic">(GMT-02:00) Mid-Atlantic</option> <option value="(GMT-03:00) Brasilia">(GMT-03:00) Brasilia</option> <option value="(GMT-03:00) Buenos Aires">(GMT-03:00) Buenos Aires</option> <option value="(GMT-03:00) Georgetown">(GMT-03:00) Georgetown</option> <option value="(GMT-03:00) Greenland">(GMT-03:00) Greenland</option> <option value="(GMT-03:00) Montevideo">(GMT-03:00) Montevideo</option> <option value="(GMT-03:30) Newfoundland">(GMT-03:30) Newfoundland</option> <option value="(GMT-04:00) Atlantic Time (Canada)">(GMT-04:00) Atlantic Time (Canada)</option> <option value="(GMT-04:00) La Paz">(GMT-04:00) La Paz</option> <option value="(GMT-04:00) Manaus">(GMT-04:00) Manaus</option> <option value="(GMT-04:00) Santiago">(GMT-04:00) Santiago</option> <option value="(GMT-04:30) Caracas">(GMT-04:30) Caracas</option> <option value="(GMT-05:00) Bogota, Lima, Quito, Rio Branco">(GMT-05:00) Bogota, Lima, Quito, Rio Branco</option> <option value="(GMT-05:00) Eastern Time (US &amp; Canada)">(GMT-05:00) Eastern Time (US &amp; Canada)</option> <option value="(GMT-05:00) Indiana (East)">(GMT-05:00) Indiana (East)</option> <option value="(GMT-06:00) Central America">(GMT-06:00) Central America</option> <option value="(GMT-06:00) Central Time (US &amp; Canada)">(GMT-06:00) Central Time (US &amp; Canada)</option> <option value="(GMT-06:00) Guadalajara, Mexico City, Monterrey">(GMT-06:00) Guadalajara, Mexico City, Monterrey</option> <option value="(GMT-06:00) Saskatchewan">(GMT-06:00) Saskatchewan</option> <option value="(GMT-07:00) Arizona">(GMT-07:00) Arizona</option> <option value="(GMT-07:00) Chihuahua, La Paz, Mazatlan">(GMT-07:00) Chihuahua, La Paz, Mazatlan</option> <option value="(GMT-07:00) Mountain Time (US &amp; Canada)">(GMT-07:00) Mountain Time (US &amp; Canada)</option> <option value="(GMT-08:00) Pacific Time (US &amp; Canada)">(GMT-08:00) Pacific Time (US &amp; Canada)</option> <option value="(GMT-08:00) Tijuana, Baja California">(GMT-08:00) Tijuana, Baja California</option> <option value="(GMT-09:00) Alaska">(GMT-09:00) Alaska</option> <option value="(GMT-10:00) Hawaii">(GMT-10:00) Hawaii</option> <option value="(GMT-11:00) Midway Island, Samoa">(GMT-11:00) Midway Island, Samoa</option> <option value="(GMT-12:00) International Date Line West">(GMT-12:00) International Date Line West</option> They are different. Same line of code but one is GMT and one is UTC. How can I force it to be always the same? Also I want to have a default choice of "UTC" but I am not sure what the diff is between this (UTC-11:00) Coordinated Universal Time-11 and this (UTC-02:00) Coordinated Universal Time-02

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• How to show an animated spinner while a background task is processing in nested rails model using aj

  - by Globalkeith

  My specific example is highly complex, so I will use the example shown by Ryan from Railscasts to discuss this: http://railscasts.com/episodes/197-nested-model-form-part-2 Background I have a form, let's say "Survey", which contains an arbitrary number of "Questions". Senario Give i am on the "Edit Survey" page. I would like to add a button to each "Question" field which calls a remote_function, which in turn queue's up a delayed_job to execute some processing on the "Question". To give feedback to the user, i would like to disable the button, and show an animated spinner, which remains until the delayed_job has processed the "Question". Hint - I can add methods to the "Question" model to indicate the status of the delayed_job. So, with best practices in mind, what is the best way to achieve this?

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• How to read nested XML using xDocument in Silver light?

  - by Subhen

  Hi currently I have a nested XMl , having the following Structure : <?xml version="1.0" encoding="utf-8" ?> <Response><Result><item id="something" /><price na="something" /> <?xml version="1.0" encoding="UTF-8" ?><DIDL-Lite xmlns="urn:schemas-upnp-org:metadata-1-0/DIDL-Lite/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:upnp="urn:schemas-upnp-org:metadata-1-0/upnp/" xmlns:dlna="urn:schemas-dlna-org:metadata-1-0/"></Result><NumberReturned>10</NumberReturned><TotalMatches>10</TotalMatches></Response> Any help on how to read this using Xdocument or XMLReader will be really helpfull. Thanks, Subhendu

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• How to find minimum cut-sets for several subgraphs of a graph of degrees 2 to 4

  - by Tore

  I have a problem, Im trying to make A* searches through a grid based game like pacman or sokoban, but i need to find "enclosures". What do i mean by enclosures? subgraphs with as few cut edges as possible given a maximum size and minimum size for number of vertices that act as soft constraints. Alternatively you could say i am looking to find bridges between subgraphs, but its generally the same problem. Given a game that looks like this, what i want to do is find enclosures so that i can properly find entrances to them and thus get a good heuristic for reaching vertices inside these enclosures. So what i want is to find these colored regions on any given map. The reason for me bothering to do this and not just staying content with the performance of a simple manhattan distance heuristic is that an enclosure heuristic can give more optimal results and i would not have to actually do the A* to get some proper distance calculations and also for later adding competitive blocking of opponents within these enclosures when playing sokoban type games. Also the enclosure heuristic can be used for a minimax approach to finding goal vertices more properly. Do you know of a good algorithm for solving this problem or have any suggestions in things i should explore?

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• Python - compare nested lists and append matches to new list?

  - by Seafoid

  Hi, I wish to compare to nested lists of unequal length. I am interested only in a match between the first element of each sub list. Should a match exist, I wish to add the match to another list for subsequent transformation into a tab delimited file. Here is an example of what I am working with: x = [['1', 'a', 'b'], ['2', 'c', 'd']] y = [['1', 'z', 'x'], ['4', 'z', 'x']] match = [] def find_match(): for i in x: for j in y: if i[1] == j[1]: match.append(j) return match This results in a series of empty lists. Is it better to use tuples and/or tuples of tuples for the purposes of comparison? Any help is greatly appreciated. Regards, Seafoid.

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• What would I use to remove escaped html from large sets of data.

  - by Elizabeth Buckwalter

  Our database is filled with articles retrieved from RSS feeds. I was unsure of what data I would be getting, and how much filtering was already setup (WP-O-Matic Wordpress plugin using the SimplePie library). This plugin does some basic encoding before insertion using Wordpress's built in post insert function which also does some filtering. I've figured out most of the filters before insertion, but now I have whacko data that I need to remove. This is an example of whacko data that I have data in one field which the content I want in the front, but this part removed which is at the end: <img src="http://feeds.feedburner.com/~ff/SoundOnTheSound?i=xFxEpT2Add0:xFbIkwGc-fk:V_sGLiPBpWU" border="0"></img> <img src="http://feeds.feedburner.com/~ff/SoundOnTheSound?d=qj6IDK7rITs" border="0"></img> &lt;img src=&quot;http://feeds.feedburner.com/~ff/SoundOnTheSound?i=xFxEpT2Add0:xFbIkwGc-fk:D7DqB2pKExk&quot; Notice how some of the images are escape and some aren't. I believe this has to do with the last part being cut off so as to be unrecognizable as an html tag, which then caused it to be html endcoded. Another field has only this which is now filtered before insertion, but I have to get rid of the others: &lt;img src=&quot;http://farm3.static.flickr.com/2183/2289902369_1d95bcdb85.jpg&quot; alt=&quot;post_img&quot; width=&quot;80&quot; (all examples are on one line, but broken up for readability) Question: What is the best way to work with the above escaped html (or portion of an html tag)? I can do it in Perl, PHP, SQL, Ruby, and even Python. I believe Perl to be the best at text parsing, so that's why I used the Perl tag. And PHP times out on large database operations, so that's pretty much out unless I wanted to do batch processing and what not. PS One of the nice things about using Wordpress's insert post function, is that if you use php's strip_tags function to strip out all html, insert post function will insert <p> at the paragraph points. Let me know if there's anything more that I can answer. Some article that didn't quite answer my questions. (http://stackoverflow.com/questions/2016751/remove-text-from-within-a-database-text-field) (http://stackoverflow.com/questions/462831/regular-expression-to-escape-html-ampersands-while-respecting-cdata)

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• Grails validation problems with sets of data: only getting one error message for all errors in a set

  - by Matt

  Hi, I'm trying to validate a domain class that has a number of subsets. class IebeUser { ... static hasMany = [openUserAnswers:OpenUserAnswer, closedUserAnswers:ClosedUserAnswer] } class OpenUserAnswer { OpenQuestion openQuestion String text static belongsTo = [user:IebeUser] static constraints = { openQuestion(nullable:false) text(blank:false) } } class ClosedUserAnswer { ClosedQuestion closedQuestion ClosedAnswer answer static belongsTo = [user:IebeUser] static constraints = { closedQuestion(nullable:false) answer(nullable:false) } } A closed question has a set of predefined answers and an open question lets the user enter a freeform answer. All is well until I come to validate the object after entry in a form: params: [closedUserAnswers[0].answer.id:, closedUserAnswers[0]:[answer:[id:], answer.id:], password:dfgdfgdf, openUserAnswers[0].text:gdfgdfgdfg, openUserAnswers[0]:[text:gdfgdfgdfg], _isOptedOut:, create:Continue, username:gdfgdfggdf, email:[email protected], closedUserAnswers[1].answer.id:, closedUserAnswers[1]:[answer:[id:], answer.id:], openUserAnswers[1].text:, openUserAnswers[1]:[text:], firstName:dfgdf, lastName:gdfgdfgd, action:save, controller:main] The key bits being: closedUserAnswers[0].answer.id:, closedUserAnswers[0]:[answer:[id:] closedUserAnswers[1].answer.id:, closedUserAnswers[1]:[answer:[id:] openUserAnswers[1].text:, openUserAnswers[1]:[text:] In my tests I have two objects of type closedUserAnswers and two of openUserAnswers. But when I call validation on IebeUser I only get validation errors for the closedUserAnswers or the openUserAnswers as a whole. I don't get validation errors for each object with a problem which is what I need. I really need an error per instance. Does anyone know what I'm doing wrong? Even when I call the validate method against each closedUserAnswer/openUserAnswer I still only get one per type. Here are my errors. Sorry for all the code, but thought I'd include as much of the code as possible so that it makes sense. Field error in object 'uk.co.cascaid.iebe.IebeUser' on field 'openUserAnswers.text': rejected value []; codes [uk.co.cascaid.iebe.OpenUserAnswer.text.blank.error.uk.co.cascaid.iebe.IebeUser.openUserAnswers.text,uk.co.cascaid.iebe.OpenUserAnswer.text.blank.error.openUserAnswers.text,uk.co.cascaid.iebe.OpenUserAnswer.text.blank.error.text,uk.co.cascaid.iebe.OpenUserAnswer.text.blank.error,openUserAnswer.text.blank.error.uk.co.cascaid.iebe.IebeUser.openUserAnswers.text,openUserAnswer.text.blank.error.openUserAnswers.text,openUserAnswer.text.blank.error.text,openUserAnswer.text.blank.error,uk.co.cascaid.iebe.OpenUserAnswer.text.blank.uk.co.cascaid.iebe.IebeUser.openUserAnswers.text,uk.co.cascaid.iebe.OpenUserAnswer.text.blank.openUserAnswers.text,uk.co.cascaid.iebe.OpenUserAnswer.text.blank.text,uk.co.cascaid.iebe.OpenUserAnswer.text.blank,openUserAnswer.text.blank.uk.co.cascaid.iebe.IebeUser.openUserAnswers.text,openUserAnswer.text.blank.openUserAnswers.text,openUserAnswer.text.blank.text,openUserAnswer.text.blank,blank.uk.co.cascaid.iebe.IebeUser.openUserAnswers.text,blank.openUserAnswers.text,blank.text,blank]; arguments [text,class uk.co.cascaid.iebe.OpenUserAnswer]; default message [Property [{0}] of class [{1}] cannot be blank] Field error in object 'uk.co.cascaid.iebe.IebeUser' on field 'closedUserAnswers.answer': rejected value [null]; codes [uk.co.cascaid.iebe.ClosedUserAnswer.answer.nullable.error.uk.co.cascaid.iebe.IebeUser.closedUserAnswers.answer,uk.co.cascaid.iebe.ClosedUserAnswer.answer.nullable.error.closedUserAnswers.answer,uk.co.cascaid.iebe.ClosedUserAnswer.answer.nullable.error.answer,uk.co.cascaid.iebe.ClosedUserAnswer.answer.nullable.error,closedUserAnswer.answer.nullable.error.uk.co.cascaid.iebe.IebeUser.closedUserAnswers.answer,closedUserAnswer.answer.nullable.error.closedUserAnswers.answer,closedUserAnswer.answer.nullable.error.answer,closedUserAnswer.answer.nullable.error,uk.co.cascaid.iebe.ClosedUserAnswer.answer.nullable.uk.co.cascaid.iebe.IebeUser.closedUserAnswers.answer,uk.co.cascaid.iebe.ClosedUserAnswer.answer.nullable.closedUserAnswers.answer,uk.co.cascaid.iebe.ClosedUserAnswer.answer.nullable.answer,uk.co.cascaid.iebe.ClosedUserAnswer.answer.nullable,closedUserAnswer.answer.nullable.uk.co.cascaid.iebe.IebeUser.closedUserAnswers.answer,closedUserAnswer.answer.nullable.closedUserAnswers.answer,closedUserAnswer.answer.nullable.answer,closedUserAnswer.answer.nullable,nullable.uk.co.cascaid.iebe.IebeUser.closedUserAnswers.answer,nullable.closedUserAnswers.answer,nullable.answer,nullable]; arguments [answer,class uk.co.cascaid.iebe.ClosedUserAnswer]; default message [Property [{0}] of class [{1}] cannot be null]

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• Program contains 2 nested loops which contain 4 if conditionals. How many paths?

  - by Student4Life

  In Roger Pressman's book, there is an example described of a program with 2 nested loops, the inner loop enclosing four if statements. The two loops can execute up to 20 times. He states that this makes about 10^14 paths. To get a number this large, it seems the paths inside the loops are multipllied by 2^40, i.e. 2^20 times 2^20 to account for all the possibilities of going through the two loops. I can't see why this factor is not just 400, i.e. 20 times 20. Can someone shed some light? It will help if you have the ppt slides and can see the program graph. Thanks.

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• PHP / MySQL - How to retrieve 2 separate sets of objects?

  - by Dan

  Hi, I have a set of models which correspond to tables in my database. I have been retrieving them easily enough, for example. $result = $mysqli->query('SOME SQL'); $post = $result->fetch_object; What would be the best approach for performing a join and also returning the related objects? For example, each post is created by a user, so for each row returned in the joined statement, both a page and user object should be returned. Any advice appreciated. Thanks.

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• Efficient algorithm to find a maximum common subset of two sets?

  - by datasunny

  Each set contains bunch of checksums. For example: Set A: { 4445968d0e100ad08323df8c895cea15 a67f8052594d6ba3f75502c0b91b868f 07736dde2f8484a4a3af463e05f039e3 5b1e374ff2ba949ab49870ca24d3163a } Set B: { 6639e1da308fd7b04b7635a17450df7c 4445968d0e100ad08323df8c895cea15 a67f8052594d6ba3f75502c0b91b868f } The maximum common subset of A and B is: { 4445968d0e100ad08323df8c895cea15 a67f8052594d6ba3f75502c0b91b868f } A lot of this operations will be performed, so I'm looking for an efficient algorithm to do so. Thanks for your help.

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• How can you toggle between two sets of values per data series in flot?

  - by Jedidja

  flot has built-in support for multiple data series (sample code) and also dual-axis (sample code). Assuming multiple data series (water, electricity, etc) that each have an amount (usage) and a dollar value (charge for that usage), what would the best way be to to use flot to display either the amount or dollar values for all the data series, while still supporting toggling display for each individual series? The idea is to send down all the data in one GET request and then let the client take care of everything else in Javascript. Ideally we could use triplets somehow {date, amount, charge}, and then possibly split that into two arrays for flot.

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• What is the best way to store three attributes entry sets in Java?

  - by user321524

  HashMaps allow for mapping key value pairs; what is the recommendation if there is an extra value? i.e HashMap maps key-value pairs: Key, Value What is the best way to map: Key, Value, Value1? Thanks.

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• Why SetMinimumSize sets the minimal heights but not width?

  - by Roman

  Here is my code: import javax.swing.*; import java.awt.*; public class PanelModel { public static void main(String[] args) { JFrame frame = new JFrame("Colored Trails"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); JPanel mainPanel = new JPanel(); mainPanel.setLayout(new BoxLayout(mainPanel, BoxLayout.Y_AXIS)); JPanel firstPanel = new JPanel(); firstPanel.setLayout(new GridLayout(4, 4)); firstPanel.setMaximumSize(new Dimension(4*100, 4*100)); firstPanel.setMinimumSize(new Dimension(4*100, 4*100)); JButton btn; for (int i=1; i<=4; i++) { for (int j=1; j<=4; j++) { btn = new JButton(); btn.setPreferredSize(new Dimension(100, 100)); firstPanel.add(btn); } } mainPanel.add(firstPanel); frame.add(mainPanel); frame.setSize(520,600); //frame.setMinimumSize(new Dimension(520,600)); frame.setVisible(true); } } When I increase the size of the window (by mouse) I see that my panel does not increase its size. It is the expected behavior (because I set the maximal size of the panel). However, when I decrease the size of the window, I see that width of the panel is decreased too (while the height is constant). So, the setMinimumSize works only partially. Why is that?

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• How to join results from two different sets in LINQ?

  - by Inez

  Hi, I get some data about customers in my database with this method: public List<KlientViewModel> GetListOfKlientViewModel() { List<KlientViewModel> list = _klientRepository.List().Select(k => new KlientViewModel { Id = k.Id, Imie = k.Imie, Nazwisko = k.Nazwisko, Nazwa = k.Nazwa, SposobPlatnosci = k.SposobPlatnosci, }).ToList(); return list; } but also I have another method which counts value for extra field in KlientViewModel - field called 'Naleznosci'. I have another method which counts value for this field based on customers ids, it looks like this: public Dictionary<int, decimal> GetNaleznosc(List<int> klientIds) { return klientIds.ToDictionary(klientId => klientId, klientId => (from z in _zdarzenieRepository.List() from c in z.Klient.Cennik where z.TypZdarzenia == (int) TypyZdarzen.Sprzedaz && z.IdTowar == c.IdTowar && z.Sprzedaz.Data >= c.Od && (z.Sprzedaz.Data < c.Do || c.Do == null) && z.Klient.Id == klientId select z.Ilosc*(z.Kwota > 0 ? z.Kwota : c.Cena)).Sum() ?? 0); } So what I want to do is to join data from method GetNaleznosc with data generated in method GetListOfKlientViewModel. I call GetNaleznosc like this: GetNaleznosc(list.Select(k => k.Id).ToList()) but don't know what to do next.

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• How can I compare two sets of data in linq and return the common data?

  - by kjm

  I have two IList<string> a and b. I want to find out what strings are in both a and b using LINQ.

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