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• Can one construct a "good" hash function using CRC32C as a base.

  - by DavidD

  Given that SSE 4.2 (Intel Core i7 & i5 parts) includes a CRC32 instruction, it seems reasonable to investigate whether one could build a faster general-purpose hash function. According to this only 16 bits of a CRC32 are evenly distributed. So what other transformation would one apply to overcome that? David

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• How to replace one object with another everywhere in the program?

  - by Entrase

  I don't really think there is some method to do this… Anyway… How can I replace one object with another everywhere in the program? It would be like all the references to an old object start to point to a new one.

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• MySQL: How can fetch SUM() of all fields in one Query?

  - by takpar

  Hi, I just want somthing like this: select SUM(*) from `mytable` group by `year` any suggestion? (I am using Zend Framework; if you have a suggestion using ZF rather than pure query would be great!) Update: I have a mass of columns in table and i do not want to write their name down one by one. No Idea??

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• HTML submit form using a CAPCHA image or a security question which one is more secure?

  - by Roland

  I've seen developers use various methods to prevent spam on a basic html contact form Method 1 is where the developer uses a Captcha image and Method 2 where only a Question is asked eg. Are you Human? with a radio button. Which one is the better one to use and why?

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• java swing, i want to close one JFrame without closing another, how can i get it ?

  - by Keating

  i have three JFrames, i want to close one of them without influence to another. what can i do to get it ? thanks Peter. I want to open two(or more) JFrames at the same time, and When I close one of them(use the default close button), others is still open.

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• Separate tables for just one field can be logical ?

  - by Freshblood

  If I have one table which has a City field and as expected this field will repeat itself so only separate it to another table can be ok for normalizing concepts? I mean separated table who has only one field can be meaningful and can help performance gaining?

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• Can two managed object context share one single persistent store coordinator?

  - by mystify

  Example: I have one persistent store coordinator which uses one single persistent store. Now there are two managed object contexts, and both want to use the same persistent store. Could both simply use the same persistent store coordinator, or would I have to create two instances of NSPersistentStoreCoordinator? And if I had to, then: Would I also have to create two NSPersistentStore instances?

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• How can I programatically move one Terminal.app window to another space?

  - by Gavin Brock

  If I have several OS-X Terminal.app windows open, how can I move one Terminal window to another space? I'm happy to use any scripting or programming language to achieve this, but would prefer AppleScript or calls to standard frameworks. (Note this is to move only one window of an application not all windows.)

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• How to get multiple counts with one SQL query?

  - by Crobzilla

  I am wondering how to write this query. I know this actual syntax is bogus, but it will help you understand what I am wanting. I need it in this format, because it is part of a much bigger query. SELECT distributor_id, COUNT(*) AS TOTAL, COUNT(*) WHERE level = 'exec', COUNT(*) WHERE level = 'personal' I need this all returned in one query. Also, it need to be in one row, so the following won't work: 'SELECT distributor_id, COUNT(*) GROUP BY distributor_id'

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• How does one access this hash from an ActiveRecord class in the Rails console?

  - by randombits

  I have a simple hash I created to make it easier to do dictionary type lookups. For instance: class Numbers < ActiveRecord::Base MY_TYPES { one: => 1, two: => 2 } end Is it not possible in the rails console to access this hash via Numbers.MY_TYPES[:one]?

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• How to create subpanels and show up one below the other in Rebol ?

  - by Rebol Tutorial

  The official tutorial here http://www.rebol.com/how-to/subpanels.html does show how to create panels and shows one OR the other not how to show them ALL of them one BELOW an other. So any other article or how to do this ?

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• efficient way to check if at least one row contains a null value in a DataView ?

  - by benj007

  Hi everybody, I need to do a test in a DataView to check if at least one row contains one cell with a null value. What is the best way to do it in your opinion ? Thanks in advance.

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• Nant or MSBuild, which one to choose and when?

  - by Yordan Pavlov

  I am aware there are other nant and msbuild related questions on stack overflow, but I could not find a direct comparison between the two and so here is the question. When should one choose Nant over MSBuild? Which one is better for what? Is Nant more suitable for home/open source projects and MSBuild for work projects? What is your experience with any of the two?

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• Java: one-liner to list Dirs in a directory?

  - by Heoa

  One-Liner to list TXT-files. import java.io.File; import java.io.FilenameFilter; ... files = dir.listFiles(new FilenameFilter() { public boolean accept(File dir, String name) { return name.toLowerCase().endsWith(".txt"); } } ); Source. Is there an one-liner to list dirs in a dir?

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• How to combine these three sql queries into one?

  - by lam3r4370

  How to combine these two sql queries into one? SELECT DISTINCT * FROM rss WHERE MATCH(content,title) AGAINST ('$filter') SELECT COUNT(content) FROM rss WHERE MATCH(content,title) AGAINST ('$filters') And if the result is 0 from the above query - SELECT DISTINCT * FROM rss WHERE content LIKE '%$filters%' OR title LIKE '%$filters%'; $filter .= $row['filter']; $filters = $row['filter']; $filters may be more than one keyword

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• Is there a way to store a one (unique) data element in SQLite?

  - by prosseek

  I need to use SQLite database file as a file for storing information, and I want to store the version of the file in the SQLite database file. How can I do this? I mean, how to store unique (only one) data in SQLite? I don't want to use store the info by making table for this, as the version info is just one number.

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• why two date classes one in java.util.Date and java.sql.Date?

  - by giri

  HI I like to know why there are two Date classes in two different packages one in java.util.Date and one in java.sql.Date? Whats the use of having two Date classes?

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• How to fill one UItableViewCell with odd and even entries from an NSMutableArray?

  - by user134282

  I have an uitableview with UITableViewCellSTyleValue1 so i have a textlabel and a detail text label. The second thing i've got is a NSMutableArray. Now i want to fill the textLabels with the even items and the detailTextlabels with the odd entries. So for example cell one(zero) gets entry 0 and 1 cell one gets 2 and 3 and so on. I didn't get it working until now. :(

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• How do can I have a dropdown list(select HTML) where i want to have one of the options where i allow

  - by Mo

  Hi I want to have a drop down menu where a user can select from several predefined options but i also want to give him the option of inserting a user specific value, i was thinking having one of the options as "user specific" which will in turn allow the user to insert a user specif entry in a text box that appears or is editable when user selects the "user specific" option. any one have any ideas how i can implement this is HTML and Javascript? thank you

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• Is it possible that one of the mysql queries would interrupt?

  - by Donator

  I really didn't know how to call the topic, but I will try to explain it here. So, for example, I have 6 queries in one page. Is it possible, that first five of them would be completed and the last one wouldn't be? Is there any possibilities? If there is, what should I do? Hope you understood smth. Thanks.

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• Why to use local pipes instead of sockets for programs communication inside one computer?

  - by Ole Jak

  Why to use local pipes instead of sockets for programs communication inside one computer? Has Any one FRESH stats on who is faster and how nmuch, what is more sequre or less?

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• How to get only one record for each duplicate rows of the id in oracle?

  - by Psychocryo

  suppose i have this table: group_id | image | image_id | ----------------------------- 23 blob 1 23 blob 2 23 blob 3 21 blob 4 21 blob 5 25 blob 6 25 blob 7 how to get results of only 1 of each group id? in this case,there may be multiple images for one group id, i just want one result of each group_id i tried distinct but i will only get group_id. max for image also would not work.

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• Can Mac have more than one client using its desktop?

  - by Phil

  I have one Server Mac OSX and have 5 windows PC's in my team. So I have this program on the MAC but I want two users in my team to be able to use this program, is there any way more than one person can VNC or remote desktop or something to the MAC server? Then those two users could both use the program on the mac server. I would need two legal licenses, I guess.

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• How do you make one line bold in a TreeView Class in WPF/C#?

  - by xarzu

  How do you make one line bold in a TreeView Class in WPF/C#? I mean, how do you make just one line in a Tree View bold at runtime?

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• Is there any way to connect more then one PPC to ActiveSync ?

  - by Gold

  hi Is there any way to connect more then one PPC to ActiveSync in one Computer ? (that i can work on 2 PPC as parallel) thank's in advance

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