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• null pointers vs. Null Object Pattern

  - by GlenH7

  Attribution: This grew out of a related P.SE question My background is in C / C++, but I have worked a fair amount in Java and am currently coding C#. Because of my C background, checking passed and returned pointers is second-hand, but I acknowledge it biases my point of view. I recently saw mention of the Null Object Pattern where the idea is than an object is always returned. Normal case returns the expected, populated object and the error case returns empty object instead of a null pointer. The premise being that the calling function will always have some sort of object to access and therefore avoid null access memory violations. So what are the pros / cons of a null check versus using the Null Object Pattern? I can see cleaner calling code with the NOP, but I can also see where it would create hidden failures that don't otherwise get raised. I would rather have my application fail hard (aka an exception) while I'm developing it than have a silent mistake escape into the wild. Can't the Null Object Pattern have similar problems as not performing a null check? Many of the objects I have worked with hold objects or containers of their own. It seems like I would have to have a special case to guarantee all of the main object's containers had empty objects of their own. Seems like this could get ugly with multiple layers of nesting.

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• How do I fix a noisy input device (Internal Mic)? snd_hda_intel - debug included

  - by hazrpg

  As the title says, I'm having trouble with a very noisy audio input device - the internal mic or any plugged in mics. So far I've narrowed it down to an problem in ALSA since my debug info is showing a lot of "null" values. Can anyone help? Debug Info: http://www.alsa-project.org/db/?f=e0c6fb7e10624bf7691aa2b405cf0d3968e56c63 Exert from the debug: model : (null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null),(null)

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• Unity completely broken after upgrade to 12.10?

  - by NlightNFotis

  I am facing a very frustrating issue with my computer right now. I successfully upgraded to Ubuntu 12.10 this afternoon, but after the upgrade, the graphical user interface seems completely broken. To be more specific, I can not get the Unity bar to appear on the right. I have tried many things, including (but not limited to) purging and then reinstalling the fglrx drivers, apt-get install --reinstall ubuntu-desktop, apt-get install --reinstall unity, tried to remove the Xorg and Compiz configurations, checked to see if the Ubuntu Unity wall was enabled (it was) in ccsm, all to no avail. Could someone help me troubleshoot and essentially fix this issue? NOTE: This is the output when I try to enable unity via a terminal: compiz (core) - Info: Loading plugin: core compiz (core) - Info: Starting plugin: core unity-panel-service: no process found compiz (core) - Info: Loading plugin: reset compiz (core) - Error: Failed to load plugin: reset compiz (core) - Info: Loading plugin: ccp compiz (core) - Info: Starting plugin: ccp compizconfig - Info: Backend : gsettings compizconfig - Info: Integration : true compizconfig - Info: Profile : unity compiz (core) - Info: Loading plugin: composite compiz (core) - Info: Starting plugin: composite compiz (core) - Info: Loading plugin: opengl X Error of failed request: BadRequest (invalid request code or no such operation) Major opcode of failed request: 153 (GLX) Minor opcode of failed request: 19 (X_GLXQueryServerString) Serial number of failed request: 22 Current serial number in output stream: 22 compiz (core) - Info: Unity is not supported by your hardware. Enabling software rendering instead (slow). compiz (core) - Info: Starting plugin: opengl Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 compiz (core) - Error: Plugin initScreen failed: opengl compiz (core) - Error: Failed to start plugin: opengl compiz (core) - Info: Unloading plugin: opengl compiz (core) - Info: Loading plugin: decor compiz (core) - Info: Starting plugin: decor compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available compiz (decor) - Warn: requested a pixmap type decoration when compositing isn't available Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 compiz (core) - Info: Loading plugin: imgpng compiz (core) - Info: Starting plugin: imgpng compiz (core) - Info: Loading plugin: vpswitch compiz (core) - Info: Starting plugin: vpswitch compiz (core) - Info: Loading plugin: resize compiz (core) - Info: Starting plugin: resize Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 compiz (core) - Info: Loading plugin: compiztoolbox compiz (core) - Info: Starting plugin: compiztoolbox compiz (core) - Error: Plugin 'opengl' not loaded. compiz (core) - Info: Loading plugin: move compiz (core) - Info: Starting plugin: move compiz (core) - Info: Loading plugin: gnomecompat compiz (core) - Info: Starting plugin: gnomecompat compiz (core) - Info: Loading plugin: mousepoll compiz (core) - Info: Starting plugin: mousepoll compiz (core) - Info: Loading plugin: wall compiz (core) - Info: Starting plugin: wall compiz (core) - Error: Plugin 'opengl' not loaded. compiz (core) - Error: Plugin init failed: wall compiz (core) - Error: Failed to start plugin: wall compiz (core) - Info: Unloading plugin: wall compiz (core) - Info: Loading plugin: regex compiz (core) - Info: Starting plugin: regex compiz (core) - Info: Loading plugin: snap compiz (core) - Info: Starting plugin: snap compiz (core) - Info: Loading plugin: unitymtgrabhandles compiz (core) - Info: Starting plugin: unitymtgrabhandles compiz (core) - Error: Plugin 'opengl' not loaded. compiz (core) - Error: Plugin init failed: unitymtgrabhandles compiz (core) - Error: Failed to start plugin: unitymtgrabhandles compiz (core) - Info: Unloading plugin: unitymtgrabhandles compiz (core) - Info: Loading plugin: place compiz (core) - Info: Starting plugin: place compiz (core) - Info: Loading plugin: grid compiz (core) - Info: Starting plugin: grid Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 compiz (core) - Info: Loading plugin: animation compiz (core) - Info: Starting plugin: animation compiz (core) - Error: Plugin 'opengl' not loaded. compiz (core) - Error: Plugin init failed: animation compiz (core) - Error: Failed to start plugin: animation compiz (core) - Info: Unloading plugin: animation compiz (core) - Info: Loading plugin: fade compiz (core) - Info: Starting plugin: fade compiz (core) - Error: Plugin 'opengl' not loaded. compiz (core) - Error: Plugin init failed: fade compiz (core) - Error: Failed to start plugin: fade compiz (core) - Info: Unloading plugin: fade compiz (core) - Info: Loading plugin: session compiz (core) - Info: Starting plugin: session compiz (core) - Info: Loading plugin: expo compiz (core) - Info: Starting plugin: expo compiz (core) - Error: Plugin 'opengl' not loaded. compiz (core) - Error: Plugin init failed: expo compiz (core) - Error: Failed to start plugin: expo compiz (core) - Info: Unloading plugin: expo compiz (core) - Info: Loading plugin: ezoom compiz (core) - Info: Starting plugin: ezoom compiz (core) - Error: Plugin 'opengl' not loaded. compiz (core) - Error: Plugin init failed: ezoom compiz (core) - Error: Failed to start plugin: ezoom compiz (core) - Info: Unloading plugin: ezoom compiz (core) - Info: Loading plugin: workarounds compiz (core) - Info: Starting plugin: workarounds compiz (core) - Error: Plugin 'opengl' not loaded. Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 compiz (core) - Info: Loading plugin: scale compiz (core) - Info: Starting plugin: scale compiz (core) - Error: Plugin 'opengl' not loaded. compiz (core) - Error: Plugin init failed: scale compiz (core) - Error: Failed to start plugin: scale compiz (core) - Info: Unloading plugin: scale Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Compiz (opengl) - Fatal: glXQueryExtensionsString is NULL for screen 0 Segmentation fault (core dumped)

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• MODx character encoding

  - by Piet

  Ahhh character encodings. Don’t you just love them? Having character issues in MODx? Then probably the MODx manager character encoding, the character encoding of the site itself, your database’s character encoding, or the encoding MODx/php uses to talk to MySQL isn’t correct. The Website Encoding Your MODx site’s character encoding can be configured in the manager under Tools/Configuration/Site/Character encoding. This is the encoding your website’s visitors will get. The Manager’s Encoding The manager’s encoding can be changed by setting $modx_manager_charset at manager/includes/lang/<language>.inc.php like this (for example): $modx_manager_charset = 'iso-8859-1'; To find out what language you’re using (and thus was file you need to change), check Tools/Configuration/Site/Language (1 line above the character encoding setting). This needs to be the same encoding as your site. You can’t have your manager in utf8 and your site in iso-8859-1. Your Database’s Encoding The charset MODx/php uses to talk to your database can be set by changing $database_connection_charset in manager/includes/config.inc.php. This needs to be the same as your database’s charset. Make sure you use the correct corresponding charset, for iso-8859-1 you need to use ‘latin1′. Utf8 is just utf8. Example: $database_connection_charset = 'latin1'; Now, if you check Reports/System info, the ‘Database Charset’ might say something else. This is because the mysql variable ‘character_set_database’ is displayed here, which contains the character set used by the default database and not the one for the current database/connection. However, if you’d change this to display ‘character_set_connection’, it could still say something else because the ’set character set’ statement used by MODx doesn’t change this value either. The ’set names’ statement does, but since it turns out my MODx install works now as expected I’ll just leave it at this before I get a headache. If I saved you a potential headache or you think I’m totally wrong or overlooked something, let me know in the comments. btw: I want to be able to use a real editor with MODx. Somehow.

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• Character Stats and Power

  - by Stephen Furlani

  I'm making an RPG game system and I'm having a hard time deciding on doing detailed or abstract character statistics. These statistics define the character's natural - not learned - abilities. For example: Mass Effect: 0 (None that I can see) X20 (Xtreme Dungeon Mastery): 1 "STAT" Diablo: 4 "Strength, Magic, Dexterity, Vitality" Pendragon: 5 "SIZ, STR, DEX, CON, APP" Dungeons & Dragons (3.x, 4e): 6 "Str, Dex, Con, Wis, Int, Cha" Fallout 3: 7 "S.P.E.C.I.A.L." RIFTS: 8 "IQ, ME, MA, PS, PP, PE, PB, Spd" Warhammer Fantasy Roleplay (1st ed?): 12-ish "WS, BS, S, T, Ag, Int, WP, Fel, A, Mag, IP, FP" HERO (5th ed): 14 "Str, Dex, Con, Body, Int, Ego, Pre, Com, PD, ED, Spd, Rec, END, STUN" The more stats, the more complex and detailed your character becomes. This comes with a trade-off however, because you usually only have limited resources to describe your character. D&D made this infamous with the whole min/max-ing thing where strong characters were typically not also smart. But also, a character with a high Str typically also has high Con, Defenses, Hit Points/Health. Without high numbers in all those other stats, they might as well not be strong since they wouldn't hold up well in hand-to-hand combat. So things like that force trade-offs within the category of strength. So my original (now rejected) idea was to force players into deciding between offensive and defensive stats: Might / Body Dexterity / Speed Wit / Wisdom Heart Soul But this left some stat's without "opposites" (or opposites that were easily defined). I'm leaning more towards the following: Body (Physical Prowess) Mind (Mental Prowess) Heart (Social Prowess) Soul (Spiritual Prowess) This will define a character with just 4 numbers. Everything else gets based off of these numbers, which means they're pretty important. There won't, however, be ways of describing characters who are fast, but not strong or smart, but absent minded. Instead of defining the character with these numbers, they'll be detailing their character by buying skills and powers like these: Quickness Add a +2 Bonus to Body Rolls when Dodging. for a character that wants to be faster, or the following for a big, tough character Body Building Add a +2 Bonus to Body Rolls when Lifting, Pushing, or Throwing objects. [EDIT - removed subjectiveness] So my actual questions is what are some pitfalls with a small stat list and a large amount of descriptive powers? Is this more difficult to port cross-platform (pen&paper, PC) for example? Are there examples of this being done well/poorly? Thanks,

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• Listing both null and not null in mysql query

  - by tomasz

  Let's say I have the table NAME | ID | REF foo1 | 1 | NULL foo2 | 2 | 1234 foo2 | 3 | 567 foo1 | 4 | NULL foo3 | 5 | 89 I'd like to count all instances of NULL and NOT NULL in one query so that I can say NAME | null | not null foo1 | 0 | 2 foo2 | 2 | 0 foo3 | 0 | 1 I could run these two queries select NAME,count(*) from TABLE where REF is not null select NAME,count(*) from TABLE where REF is null But I'm sure there must be a simple way to do it in one mysql query.

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• Null check error message as "is null" or "was null"

  - by Timo Westkämper

  When doing null checks in Java code, and you throw IllegalArgumentExceptions for null values, what kind of message template do you use? We tend to use something like this public User getUser(String username){ if (username == null){ throw new IllegalArgumentException("username is null"); } // ... } What is better : "is null" or "was null", and why? For me "is null" feels more natural.

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• How does it matter if a character is 8 bit or 16 bit or 32 bit

  - by vin

  Well, I am reading Programing Windows with MFC, and I came across Unicode and ASCII code characters. I understood the point of using Unicode over ASCII, but what I do not get is how and why is it important to use 8bit/16bit/32bit character? What good does it do to the system? How does the processing of the operating system differ for different bits of character. My question here is, what does it mean to a character when it is a x-bit character?

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• So which null equals this null, that null? maybe this null, or is it this null?

  - by GrumpyOldDBA

  Tuning takes many routes and I get into some interesting situations and often make some exciting finds, see http://sqlblogcasts.com/blogs/grumpyolddba/archive/2010/05/17/just-when-you-thought-it-was-safe.aspx for an example. Today I encountered a multitude of Foreign Key constraints on a table, now FKs are often candidates for indexes and as none of the defined keys had an index it required a closer look. I view foreign key constraints as somewhat of a pain, excessive keys can cause excessive related...(read more)

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• Check parameters annotated with @Nonnull for null?

  - by David Harkness

  We've begun using FindBugs with and annotating our parameters with @Nonnull appropriately, and it works great to point out bugs early in the cycle. So far we have continued checking these arguments for null using Guava's checkNotNull, but I would prefer to check for null only at the edges--places where the value can come in without having been checked for null, e.g., a SOAP request. // service layer accessible from outside public Person createPerson(@CheckForNull String name) { return new Person(Preconditions.checkNotNull(name)); } ... // internal constructor accessed only by the service layer public Person(@Nonnull String name) { this.name = Preconditions.checkNotNull(name); // remove this check? } I understand that @Nonnull does not block null values itself. However, given that FindBugs will point out anywhere a value is transferred from an unmarked field to one marked @Nonnull, can't we depend on it to catch these cases (which it does) without having to check these values for null everywhere they get passed around in the system? Am I naive to want to trust the tool and avoid these verbose checks? Bottom line: While it seems safe to remove the second null check below, is it bad practice? This question is perhaps too similar to Should one check for null if he does not expect null, but I'm asking specifically in relation to the @Nonnull annotation.

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• MySql query optimization help

  - by rohitgu

  I have few queries and am not able to figure out how to optimize them, QUERY 1 select * from t_twitter_tracking where classified is null and tweetType='ENGLISH' order by id limit 500; QUERY 2 Select count(*) as cnt, DATE_FORMAT(CONVERT_TZ(wrdTrk.createdOnGMTDate,'+00:00','+05:30'),'%Y-%m-%d') as dat from t_twitter_tracking wrdTrk where wrdTrk.word like ('dell') and CONVERT_TZ(wrdTrk.createdOnGMTDate,'+00:00','+05:30') between '2010-12-12 00:00:00' and '2010-12-26 00:00:00' group by dat; Both these queries run on the same table, CREATE TABLE `t_twitter_tracking` ( `id` BIGINT(20) NOT NULL AUTO_INCREMENT, `word` VARCHAR(200) NOT NULL, `tweetId` BIGINT(100) NOT NULL, `twtText` VARCHAR(800) NULL DEFAULT NULL, `language` TEXT NULL, `links` TEXT NULL, `tweetType` VARCHAR(20) NULL DEFAULT NULL, `source` TEXT NULL, `sourceStripped` TEXT NULL, `isTruncated` VARCHAR(40) NULL DEFAULT NULL, `inReplyToStatusId` BIGINT(30) NULL DEFAULT NULL, `inReplyToUserId` INT(11) NULL DEFAULT NULL, `rtUsrProfilePicUrl` TEXT NULL, `isFavorited` VARCHAR(40) NULL DEFAULT NULL, `inReplyToScreenName` VARCHAR(40) NULL DEFAULT NULL, `latitude` BIGINT(100) NOT NULL, `longitude` BIGINT(100) NOT NULL, `retweetedStatus` VARCHAR(40) NULL DEFAULT NULL, `statusInReplyToStatusId` BIGINT(100) NOT NULL, `statusInReplyToUserId` BIGINT(100) NOT NULL, `statusFavorited` VARCHAR(40) NULL DEFAULT NULL, `statusInReplyToScreenName` TEXT NULL, `screenName` TEXT NULL, `profilePicUrl` TEXT NULL, `twitterId` BIGINT(100) NOT NULL, `name` TEXT NULL, `location` VARCHAR(100) NULL DEFAULT NULL, `bio` TEXT NULL, `url` TEXT NULL COLLATE 'latin1_swedish_ci', `utcOffset` INT(11) NULL DEFAULT NULL, `timeZone` VARCHAR(100) NULL DEFAULT NULL, `frenCnt` BIGINT(20) NULL DEFAULT '0', `createdAt` DATETIME NULL DEFAULT NULL, `createdOnGMT` VARCHAR(40) NULL DEFAULT NULL, `createdOnServerTime` DATETIME NULL DEFAULT NULL, `follCnt` BIGINT(20) NULL DEFAULT '0', `favCnt` BIGINT(20) NULL DEFAULT '0', `totStatusCnt` BIGINT(20) NULL DEFAULT NULL, `usrCrtDate` VARCHAR(200) NULL DEFAULT NULL, `humanSentiment` VARCHAR(30) NULL DEFAULT NULL, `replied` BIT(1) NULL DEFAULT NULL, `replyMsg` TEXT NULL, `classified` INT(32) NULL DEFAULT NULL, `createdOnGMTDate` DATETIME NULL DEFAULT NULL, `locationDetail` TEXT NULL, `geonameid` INT(11) NULL DEFAULT NULL, `country` VARCHAR(255) NULL DEFAULT NULL, `continent` CHAR(2) NULL DEFAULT NULL, `placeLongitude` FLOAT NULL DEFAULT NULL, `placeLatitude` FLOAT NULL DEFAULT NULL, PRIMARY KEY (`id`), INDEX `id` (`id`, `word`), INDEX `createdOnGMT_index` (`createdOnGMT`) USING BTREE, INDEX `word_index` (`word`) USING BTREE, INDEX `location_index` (`location`) USING BTREE, INDEX `classified_index` (`classified`) USING BTREE, INDEX `tweetType_index` (`tweetType`) USING BTREE, INDEX `getunclassified_index` (`classified`, `tweetType`) USING BTREE, INDEX `timeline_index` (`word`, `createdOnGMTDate`, `classified`) USING BTREE, INDEX `createdOnGMTDate_index` (`createdOnGMTDate`) USING BTREE, INDEX `locdetail_index` (`country`, `id`) USING BTREE, FULLTEXT INDEX `twtText_index` (`twtText`) ) COLLATE='utf8_general_ci' ENGINE=MyISAM ROW_FORMAT=DEFAULT AUTO_INCREMENT=12608048; The table has more than 10 million records. How can I optimize it?

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• PHP: why is this null different from the other null

  - by matthy

  hi i tried 2 things what should be the same however it my testing says different does anyone know why the only thing i do is put it in a variable... if ($_SESSION[$something] === null) echo("this is null"); $_SESSION[$something] does not exists so it indeed says: "this is null". now look at this $theSession = $_SESSION[$something]; if (theSession === null) echo("this is null"); now it does not say "this is null" while it should be exactly the same right?

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• Find the occurrence of word/character in SQL column with wildcard character - PATINDEX

  - by Vipin

  CharIndex and PatIndex both can be used to determine the presence of character or string within sql column data. Both returns the starting position of the first occurrence of the character/word within expression. However, one major difference between CharIndex and PatIndex is that later allows the use of wild card characters while searching for character or word within column data. Also, Patindex is useful for searching within Text datatype. Allowed wild card characters are % and _ . " % "  - use it for any number of characters " _ "  - use it for a single character. Syntax PATINDEX('%pattern%', string_expression) Note - it's mandatory to include pattern within %% characters. returns starting position of occurrence of pattern, if found. returns 0, if not found returns NULL , if either pattern or string_expression is null. Example SELECT fldname FROM tblUsers WHERE PatIndex('%v_pin%', fldname) > 0

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• Designing Videogame Character Parodies [duplicate]

  - by David Dimalanta

  This question already has an answer here: Is it legal to add a cameo appearance of a known video game character in my game? 2 answers Was it okay to make a playable character when making a videogame despite its resemblance? For example, I'm making a 3rd-person action-platform genre and I have to make a character design resembling like Megaman but not exactly the same as him since there is little alternate in color, details, and facial features.

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• Estimated budget for RockBand 3 character creator feature [closed]

  - by milesmeow

  I want to get an idea of the budget required to make something akin to the Rock Band 3 character creator. We won't have the same level of detail for creating the base character, i.e. no face feature customization. We essentially want some very basic body sizing and want a bunch of clothing and accessories that the characters can try on. The clothing and accessories need to adapt and fit to the body types/shapes. The character should also support movement...and the clothes should move with the body. I've asked a similar question here regarding the development effort but not necessarily a budget. Do you think it's a $1M job? Most of the effort will go into creating the character models and the clothing models. The rest of the effort will go towards the user interface to navigate the customization features.

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• two byte character or one byte character

  - by RBrattas

  Hi, How can I see if the input string is a two byte character or one byte character; and from which encoding system the character is coming from? I am using C# and SilverLight; I assume I could find the encoding the computer is running and then the character? Any code snippet? Thank you, Rune // Get a UTF-32 encoding by codepage.Encoding Encoding_12000_instance = Encoding.GetEncoding(12000); // Get a UTF-32 encoding by name.Encoding Encoding_UTF32_instance = Encoding.GetEncoding("utf-32");

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• Difference between null==object and object==null

  - by priyank.mp

  Hi I would like to know diff between the above comparisons? I am getting null pointer exception when I check object.getItems() == null. But if I change it to null == object.getItems(), it workes fine. I did look into this http://stackoverflow.com/questions/2938476/what-is-the-difference-between-null-object-and-objectnull-closed But I didnt get satisfactory answer.

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• "Null" is null or not an object error in IE javascript

  - by user89691

  The following code executes fine in Firefox and Chrome, but gives an error: 'null' is null or not an object when executed in Internet Explorer. if (xmlhttp.responseXML != null) { var xmlDoc = xmlhttp.responseXML.documentElement ; var ResultNodes = xmlDoc.getElementsByTagName ("Result") ; <---- error here if (ResultNodes != null) { (I would have thought the line after the one indicated would be more likely to return the error but the debugger says the run-time error is at the line indicated) Any ideas why?

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• "Null" is null or not an object error in IE javascript

  - by rossmcm

  The following code executes fine in Firefox and Chrome, but gives an error: 'null' is null or not an object when executed in Internet Explorer. if (xmlhttp.responseXML != null) { var xmlDoc = xmlhttp.responseXML.documentElement ; var ResultNodes = xmlDoc.getElementsByTagName ("Result") ; <---- error here if (ResultNodes != null) { (I would have thought the line after the one indicated would be more likely to return the error but the debugger says the run-time error is at the line indicated) Any ideas why?

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• Null object that is not null

  - by Guillaume

  Hello, I use 2 threads to act like a produce/consumer using double queue (http://www.codeproject.com/KB/threads/DoubleQueue.aspx). Sometimes in my 2nd thread, I get an object that is NULL but it should not be as I filled it in the first thread. I tried this: if(myObject.Data == null) { Console.WriteLine("Null Object") // <-- Breakpoint here } When I my break point hits, I can watch myObject.Data and indeed it's NULL, but when I hit F10 and then go to the next line (which is } ) myObject.Data is not NULL. I also added a lock on myObject before if .... to be sure that no one whould use this object. How is that possible and what can I do ?

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• Returning null vs Throwing exceptions

  - by Svish

  Is in a bit of disagreement with a more experienced developer on this issue, and was wondering what you guys here think about this. Environment is Java, EJB 3, services, etc. The code I wrote calls a service to get things and to create things. Problem was that I got null pointer exceptions in places that didn't make sense. For example when I asked the service to create an object, I got null back. And when I tried to look up an object with an id I knew existed, I still got null back. Was like it was ignoring me. Spent some time trying to figure out what was wrong in my code (since I'm less experienced I usually assume I have messed up). Turns out the reason was security. If the user principal using my service didn't have the right permissions to use the service I called from my service, then that service simply returned null. The services that are here already are usually not documented either, so this is just something you have to know... somehow... So here is the thing: I mean that this is rather confusing as a developer interacting with this service. To me it would make much more sense if that service thew an exception which would tell me that hey, you don't have the proper permissions to get info about this thing or to create this new thing. I would then immediately know why my service wasn't working as expected. However, he argued that asking is not wrong. Exceptions should only be thrown when there is an error and asking for a thing is not an error. Even if you don't have permission to "see" that the thing you asked for. The things are often looked up in a GUI by users and for those users not having the right permissions, these things simply "do not exist". So, in short: Asking is not wrong, hence no exception. Get methods return null because to those users those things "doesn't exist". Create methods return null because nothing was created, since the user wasn't allowed to create anything. So, what do you guys think? Is this normal and/or good practice? I prefer exceptions as I prefer throwing and catching exceptions because I find it much easier to know what's going on. So I would for example also prefer to throw a NotFoundException if you asked for an id which didn't exist, rather than returning null. Anyways, just curious to what others think about this as I'm not the most experienced developer yet.

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• Efficient way to calculate byte length of a character, depending on the encoding

  - by BalusC

  What's the most efficient way to calculate the byte length of a character, taking the character encoding into account? In UTF-8 for example the characters have a variable byte length, so each character needs to be determined individually. As far now I've come up with this: char c = getItSomehow(); String encoding = "UTF-8"; int length = new String(new char[] { c }).getBytes(encoding).length; But this is clumsy and inefficient in a loop since a new String needs to be created everytime. I can't find other and more efficient ways in the Java API. I imagine that this can be done with bitwise operations like bit shifting, but that's my weak point and I'm unsure how to take the encoding into account here :) If you question the need for this, check this topic.

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• #define NULL NULL

  - by sheepsimulator

  #ifndef NULL #define NULL NULL #endif This code compiles in gcc with no warnings/errors. Can someone explain what the preprocessor is doing here?

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• which is more effective [ if(NULL==variables) or if(variables==NULL) ]

  - by Apache

  hi expert, want to ask, in java if(NULL==variables) or if(variables==NULL) which will be more effective and what are the difference, thanks

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• MySQL Database Query Problem

  - by moustafa

  I need your help!!!. I need to query a table in my database that has record of goods sold. I want the query to detect a particular product and also calculate the quantity sold. The product are 300 now, but it would increase in the future. Below is a sample of my DB Table #---------------------------- # Table structure for litorder #---------------------------- CREATE TABLE `litorder` ( `id` int(10) NOT NULL auto_increment, `name` varchar(50) NOT NULL default '', `address` varchar(50) NOT NULL default '', `xdate` date NOT NULL default '0000-00-00', `ref` varchar(20) NOT NULL default '', `code1` varchar(50) NOT NULL default '', `code2` varchar(50) NOT NULL default '', `code3` varchar(50) NOT NULL default '', `code4` varchar(50) NOT NULL default '', `code5` varchar(50) NOT NULL default '', `code6` varchar(50) NOT NULL default '', `code7` varchar(50) NOT NULL default '', `code8` varchar(50) NOT NULL default '', `code9` varchar(50) NOT NULL default '', `code10` varchar(50) NOT NULL default '', `code11` varchar(50) character set latin1 collate latin1_bin NOT NULL default '', `code12` varchar(50) NOT NULL default '', `code13` varchar(50) NOT NULL default '', `code14` varchar(50) NOT NULL default '', `code15` varchar(50) NOT NULL default '', `product1` varchar(100) NOT NULL default '0', `product2` varchar(100) NOT NULL default '0', `product3` varchar(100) NOT NULL default '0', `product4` varchar(100) NOT NULL default '0', `product5` varchar(100) NOT NULL default '0', `product6` varchar(100) NOT NULL default '0', `product7` varchar(100) NOT NULL default '0', `product8` varchar(100) NOT NULL default '0', `product9` varchar(100) NOT NULL default '0', `product10` varchar(100) NOT NULL default '0', `product11` varchar(100) NOT NULL default '0', `product12` varchar(100) NOT NULL default '0', `product13` varchar(100) NOT NULL default '0', `product14` varchar(100) NOT NULL default '0', `product15` varchar(100) NOT NULL default '0', `price1` int(10) NOT NULL default '0', `price2` int(10) NOT NULL default '0', `price3` int(10) NOT NULL default '0', `price4` int(10) NOT NULL default '0', `price5` int(10) NOT NULL default '0', `price6` int(10) NOT NULL default '0', `price7` int(10) NOT NULL default '0', `price8` int(10) NOT NULL default '0', `price9` int(10) NOT NULL default '0', `price10` int(10) NOT NULL default '0', `price11` int(10) NOT NULL default '0', `price12` int(10) NOT NULL default '0', `price13` int(10) NOT NULL default '0', `price14` int(10) NOT NULL default '0', `price15` int(10) NOT NULL default '0', `quantity1` int(10) NOT NULL default '0', `quantity2` int(10) NOT NULL default '0', `quantity3` int(10) NOT NULL default '0', `quantity4` int(10) NOT NULL default '0', `quantity5` int(10) NOT NULL default '0', `quantity6` int(10) NOT NULL default '0', `quantity7` int(10) NOT NULL default '0', `quantity8` int(10) NOT NULL default '0', `quantity9` int(10) NOT NULL default '0', `quantity10` int(10) NOT NULL default '0', `quantity11` int(10) NOT NULL default '0', `quantity12` int(10) NOT NULL default '0', `quantity13` int(10) NOT NULL default '0', `quantity14` int(10) NOT NULL default '0', `quantity15` int(10) NOT NULL default '0', `amount1` int(10) NOT NULL default '0', `amount2` int(10) NOT NULL default '0', `amount3` int(10) NOT NULL default '0', `amount4` int(10) NOT NULL default '0', `amount5` int(10) NOT NULL default '0', `amount6` int(10) NOT NULL default '0', `amount7` int(10) NOT NULL default '0', `amount8` int(10) NOT NULL default '0', `amount9` int(10) NOT NULL default '0', `amount10` int(10) NOT NULL default '0', `amount11` int(10) NOT NULL default '0', `amount12` int(10) NOT NULL default '0', `amount13` int(10) NOT NULL default '0', `amount14` int(10) NOT NULL default '0', `amount15` int(10) NOT NULL default '0', `totalNaira` double(20,0) NOT NULL default '0', `totalDollar` int(20) NOT NULL default '0', PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=latin1 COMMENT='InnoDB free: 4096 kB; InnoDB free: 4096 kB; InnoDB free: 409'; #---------------------------- # Records for table litorder #---------------------------- insert into litorder values (27, 'Sanyaolu Fisayo', '14 Adegboyega Street Palmgrove Lagos', '2010-05-31', '', 'DL 001', 'DL 002', 'DL 003', '', '', '', '', '', '', '', '', '', '', '', '', 'AILMENT & PREVENTION DVD- ENGLISH', 'AILMENT & PREVENTION DVD- HAUSA', 'BEAUTY CD', '', '', '', '', '', '', '', '', '', '', '', '', 800, 800, 3000, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 16, 16, 20, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 12800, 12800, 60000, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, '85600', 563), (28, 'Irenonse Esther', 'Lagos,Nigeria', '2010-06-01', '', 'DL 005', 'DL 008', 'FC 004', '', '', '', '', '', '', '', '', '', '', '', '', 'GET HEALTHY DVD', 'YOUR FUTURE DVD', 'FOREVER FACE CAP (YELLOW)', '', '', '', '', '', '', '', '', '', '', '', '', 1000, 900, 2000, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 2, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2000, 1800, 6000, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, '9800', 64), (29, 'Kalu Lekway', 'Lagos, Nigeria', '2010-06-01', '', 'DL 001', 'DL 003', '', '', '', '', '', '', '', '', '', '', '', '', '', 'AILMENT & PREVENTION DVD- ENGLISH', 'BEAUTY CD', '', '', '', '', '', '', '', '', '', '', '', '', '', 800, 3000, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 6, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2400, 18000, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, '20400', 133), (30, 'Dele', 'Ilupeju', '2010-06-02', '', 'DL 001', 'DL 003', '', '', '', '', '', '', '', '', '', '', '', '', '', 'AILMENT & PREVENTION DVD- ENGLISH', 'BEAUTY CD', '', '', '', '', '', '', '', '', '', '', '', '', '', 800, 3000, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 10, 10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8000, 30000, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, '38000', 250);

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