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• javascript: how do I get the number of an item in an array?

  - by jesse

  var fruits = [ 'apple', 'banana', 'orange' ]; how do I find what number the value "banana" is? (which, of course, is "1"). thanks

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• Is there any inflector like library that can return a word based on a number?

  - by stacker

  I'm using inflector Pluralize and Singularize functions. I want to know if there is a ready library that know to decide if a word needs to be Pluralize or Singularize based on a number. Like: 0 articles 1 article 2 articles

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• How do I tag files in a directory in a SVN repository with a global version number that will appear

  - by mithaldu

  I am working on a project that stores multiple versions in the same svn repo but in different directories. For ease of reference for the coders working on the project I'd like to be able to add a commented tag similarly to # $Revision: 144 $ However, instead of the file revision it should contain a simple version number like so: # $Version: 1.63 $ # $Version: 1.64 $ # $Version: 2.0 $ Is there a way to get subversion to do this automatically for a specific directory and all sub-directories as well as for any new files added to those?

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• How to arrange array in decreasing order of frequency of each number?

  - by Rajendra

  Input : {5, 13, 6, 5, 13, 7, 8, 6, 5} Output : {5, 5, 5, 13, 13, 6, 6, 7, 8} Question is to arrange the numbers in the array in decreasing order of their frequency preserving the order of their occurrence. If their is a tie, for example, here 13 and 6 then the number occurring first in input array would come first in output array.

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• What is a magic number, and why is it bad?

  - by Adam Davis

  What is a magic number? Why should it be avoided? Are there cases where it's appropriate?

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• I need to randomize a number between two hex numbers, represented as strings.

  - by eriks

  ...and return the number as string. How can I do that? Is there any library for that?

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• Do you know of a log4net appender which rolls on date, but let's you limit the total number of files

  - by Michal Drozdowicz

  Hi, I need to define an appender for log4net in a way that I get one log file for each day, but the total number of files are limited to, let's say, 30. That is I want to keep only the logs not older then 30 days, delete the older ones. I've tried doing it with RollingFileAppender, but it seems that specifying a limit of files to keep is not supported. Do you know of an alternative solution that I could use?

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• How to reverse a number as an integer and not as a string?

  - by Pritam

  I came across a question "How can one reverse a number as an integer and not as a string?" Could anyone please help me to find out the answer.

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• Is het possible to read the iPhone phone number out of the settings?

  - by Chrizzz

  Hi, I would like to pre-populate a UITextfield with the phone number of the current iPhone device. Can that be done? regards, Christian

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• What's the maximum number of operators you that can be used in an if statement?

  - by DMinGod

  Hi, i'm using jquery and I'm trying to validate a form. My question is - What is the maximum number of tests can you give in a single if statement. function cc_validate () { if ($("#name").val() == "" || $("#ship_name").val() == "" || $("#address").val() == "" || $("#city").val() == "" || $("#ship_city").val() == "" || $("#state").val() == "" || $("#ship_state").val() == "" || $("#postal_code").val() == "" || isNaN($("#postal_code").val()) || $("#phone").val() == "" || $("#ship_phone").val() == "" || isNaN($("#phone").val()) || isNaN($("#ship_phone").val()) || $("#mobile_number").val() == "" || $("#ship_mobile_number").val() == "" || isNaN($("#mobile_number").val()) || isNaN($("#ship_mobile_number").val()) || $("#email").val() == "") { return false; } else { return true; } }

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• Do the speed of the query depends on the number of rows in the table ?

  - by Omu

  let's say I have this query: select * from table1 r where r.x = 5 do the speed of this query depends on the number of rows that are present in table1 ?

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• [R] How to create a data.frame with a unknow number of columns ?

  - by Olivier

  Hello I would like to create, in a function, a boucle to create a data.frame with a variable number of columns. WIth something like : a = c("a","b") b = c(list(1,2,3), list(4,5,6)) data.frame(a,b) I would like to get a data-frame like : a 1 2 3 b 4 5 6 Instead of I obtain : a 1 2 3 4 5 6 b 1 2 3 4 5 6 Thank you ! PS : I also try with rbind, but it's doesn't work...

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• Is HTTP 404 appropriate for out of range page number on paged content?

  - by WooYek

  I have a site that is mainly showing a paged list of content (articles, data element's, etc.), and I'm wondering about returning HTTP 404 when user navigates outside of the available list range. Some sites just display "No results/Page number out of range" and some return additionally return HTTP 404 status. What's your take on that, and why? UPDATE It's not and api response. This question is in regard to user viewed pages that among other things show a list/table in the main area.

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• How to count the number of right children in a binary tree?

  - by flopex

  How to count the number of right children in a binary tree? This means that I only want the children marked as right. Ex. (Left | Right) F(Root) G | H T U | I J The right children would be U,H,and J. What would be the algorithm to find these.

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• UI design for screen which has number of data entry textFields.

  - by shilpa

  Hi all, my app is an e-commerce application. During the checkout process, I have "recipient" and "credit card" screens. In the recipient screen, there are number of fields for address entry, which makes it very clumsy. Same in the case of the credit card screen, where the user is asked to enter their credit card info and billing address. Can anyone suggest how to design these two pages?

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• How to efficiently count the number of keys/properties of an object in JavaScript?

  - by mjs

  What's the fastest way to count the number of keys/properties of an object? It it possible to do this without iterating over the object? i.e. without doing var count = 0; for (k in myobj) if (myobj.hasOwnProperty(k)) count++; Firefox provides a magic __count__ property, but this isn't available in other implementations.

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• How to specify number of headers in section UITableView.

  - by Mr. McPepperNuts

  if ([tempArray containsObject: [sectionInfo indexTitle]]) { return nil; }else { [tempArray addObject: [sectionInfo indexTitle]]; return [sectionInfo indexTitle]; } return [sectionInfo indexTitle]; The code above groups the cells in alphabetical order but displays a blank header instead of the appropriate title. Could this possibly be because I did not specify the number of headers? This would naturally be a single header for every letter in the alphabet.

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• Does the concept of "magic number" change from language to language?

  - by Gerardo Marset

  Take the following code in C/C++, for example: int foo[] = {0, 0, 0, 0}; No magic numbers, right? Now, the Python "equivalent" of that would be: foo = [0, 0, 0, 0] Still no magic numbers. However, in Python, that same thing can be written like this: foo = [0] * 4 And now we DO have a magic number. Or do we? I'm guessing this and other similar things are present on these and other languages.

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• How can you replicate each row of an R data.frame and specify the number of replications for each ro

  - by wkmor1

  df <- data.frame(var1=c('a', 'b', 'c'), var2=c('d', 'e', 'f'), freq=1:3) What is the simplest way to expand the first two columns of the data.frame above, so that each row appears the number of times specified in the column 'freq'? In other words, go from this: >df var1 var2 freq 1 a d 1 2 b e 2 3 c f 3 To this: >df.expanded var1 var2 1 a d 2 b e 3 b e 4 c f 5 c f 6 c f

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• How can I get the position of rows relative to total number of rows based on a field?

  - by Arms

  I have a scores table that has two fields: user_id score I'm fetching specific rows that match a list of user_id's. How can I determine a rank for each row relative to the total number of rows, based on score? The rows in the result set are not necessarily sequential (the scores will vary widely from one row to the next). I'm not sure if this matters, but user_id is a unique field.

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• C++: how can I test if a number is power of ten?

  - by Helltone

  I want to test if a number double x is a power of 10. I could perhaps use cmath's log10 and then test if x == (int) x?

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• How to determine whether a spread-sheet cell contains a date, or a real number?

  - by Everyone

  When a cell in a spreadsheet contains a simple date (mm/dd/yyyy) the poi API flags the cell-type as 'numeric'. This is probably because spreadsheets ( IMO ) historically recognize only strings and real numbers. It is possible to hard-code the cell-index, and use it conditionally to call 'getDateCellValue'. But this feels like a hack. What other ways are there in the poi API to determine whether the content in a cell is a Date rather than a real number?

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• Ruby on Rails: How do you add add zeros in front of a number if it's under 10?

  - by sjsc

  I'm looking to convert single digit numbers to two-digit numbers like so: 9 ==> 09 5 ==> 05 12 == 12 4 ==> 04 I figure I could put a bunch of if-else statements (if number is under 10, then do a gsub) but figure that's horrible coding. I know Rails has number_with_precision but I see that it only applies to decimal numbers. Any ideas on how to convert single-digits to two-digits?

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• Does the number of rows in mysql table matter?

  - by 1s2a3n4j5e6e7v

  I'm coming up with a web app which will want me to store more than 80 Lakh (8 million) rows. Will it be fine to handle those many number of rows with MySQL without having any performance degradation? Assume my RAM to be 4 GB and Infinity GB Harddisk space. Also, the main fields have been indexed.

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• A programmatic way to discover the number of CPUs and spec for each CPU/Core in Ubuntu Karmic?

  - by Viet

  A programmatic way to discover the number of CPUs and spec for each CPU/Core in Ubuntu Karmic? Bash or C/C++, Python, Perl are fine. Thanks!

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