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Search found 26530 results on 1062 pages for 'number formatting'.

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• dropping characters from regular expression groups

  - by tcurdt

  The goal: I want to convert a number from the format "10.234,56" to "10234.56" Using this simple approach almost gets us there /([\d\.]+),(\d\d)/ => '\1.\2' The problem is that the first group of the match (of course) still contains the '.' character. So questions are: Is it possible to exclude a character from the group somehow? How would you solve this with a single regexp (I know this is a trivial problem when not using a single regexp)

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• MySQL Order By Problem, Why is 1000 being seen as Smaller than 2?

  - by Jack

  I have a strange problem, I am trying to order the output of a set of records by a field called displayOrder. Now even though record A has a displayOrder of 2 and record B has a displayOrder of 1000, record B still shows up before record A. Here's my select statement: SELECT * FROM items ORDER BY displayOrder ASC It works fine until I have a record greater than 9, then 10, 11, 12, etc are seen as smaller than 2, 3, 4 because they start with the number 1. Any way to fox this?

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• If I divide 3 by 2 I want the answer to be 2 (ie 1.5 rounded to 2)

  - by Srinivasa Varadan

  How to get he upper limit of a number in C? If I divide 3 by 2 I want the answer to be 2 (ie 1.5 rounded to 2).

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• How do I create spaces between every four integers in Ruby?

  - by Trip

  I am trying to take the following number: 423523420987 And convert it to this: 4235 2342 0987 It doesn't necessarily have to be an integer either. In fact, I would prefer it to be a string.

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• question about heapsearch order

  - by davit-datuashvili

  ia have meet following problem suppose we have sorted array of size 2^k-1 where k is given number we should copy this array into heapsearch array b the elements in odd positions of a go in order into last half of the positions of b positions congruent to 2 modul0 4 go into b's secodn quarter and so on this is not homework and please nobody tag it as homework it is from programming pearls please any ideas

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• how to log failures in php unit?

  - by user187809

  How to log only failures in an external file, from php unit? I want the complete information, including actual value, expected value, line number etc. Right now I am using fwrite and logging all pass and fail tests into a file, is there a better way to do it?

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• What is time complexity for find method in a set in c++?

  - by tsubasa

  set<int> s; s.insert(1); s.insert(2); ... s.insert(n); I wonder how much time it takes for s.find(k) where k is a number from 1..n? I assume it is log(n). Is it correct?

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• Is there any way to trigger some macro after build in visual studio

  - by uzay95

  I want to count how many times i built on VS.NET . I have a plan. If i run svn commit when i build to project, i would have build count on revision number :) I didn't write any macro which can execute a command. And i don't know visual studio is allowing to prebuild event for this kind of request.

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• TCP Connection Persistent State

  - by TripShock

  Is there any field/option/anything that I can put in a TCP packet (be it a syn or an ack or just plain data) that I can be sure will be returned by the other end intact? For eg. I want to "tag" a particular connection (src, srcport, dst, dstport) with a number that I can always read from a packet belonging to that connection. That means I can identify the connection without using the 4-tuple (as given above).

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• Unicode escaping in C/C++

  - by Geo

  Hi guys! I'm having a dispute with a colleague of mine. She says that the following: char* a = "\x000aaxz"; will/can be seen by the compiler as "\x000aa". I do not agree with her, as I think you can have a maximum number of 4 hex characters after the \x. Can you have more than 4 hex chars? Who is right here?

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• ruby sortby 3rd element in a multidimential array npot working properly

  - by Steven

  Hi, I'm using ruby to sort an array where each element in the array is another array. I have this: Data = Data.SortBy { |Info| info[3] } example data in this column: 3.1 2 5.65 -1 0.4 -9.43 -10.87 -2.3 It should sort this into: 5.65 3.1 2 0.4 -1 -2.3 -9.43 -10.87 But it comes out like this: 5.65 3.1 2 0.4 -1 -10.87 -2.3 -9.43 It's only comparing the first char of the float... not the whole number?

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• Counting the instances of customers

  - by Mikae Combarado

  Say that I have a table with one column named CustomerId. The example of the instance of this table is : CustomerId 14 12 11 204 14 204 I want to write a query that counts the number of occurences of customer IDs. At the end, I would like to have a result like this : CustomerId NumberOfOccurences 14 2 12 1 11 1 204 2 14 1 I cannot think of a way to do this.

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• Install python 2.6 in CentOS

  - by tehryan

  I have a shell that runs CentOS For a project I'm doing I need python 2.5+ but centOS is pretty dependent on 2.4 From what I've read a number of things will break if you upgrade to 2.5 I wan't to install 2.5 separately from 2.4 but I'm not sure how to do it. So far I've downloaded the source tarball, untarred it and did a ./configure --prefix=/opt which is where I want it to end up. can I now just make, make install ? or is there more?

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• Python: convert 2 ints to 32 float

  - by bugspy.net

  How can I combine 2 ints to a single 32bit IEEE floating point ? (each of the 2 ints represent 16 bit) And in the opposite direction: How can I transform a python float into 2 16 bit ints? (I need this because of modbus protocol - where 2x16 bit registers are treated as single 32 floating point number)

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• Help with sql query

  - by user225269

  I have two tables: subject and student. I'm trying to count the number of subjects enrolled by each student. How do I do that?I'm trying the code below but it doesn't give the answer I need. Please help. SELECT COUNT( subject.SUBJECT ) , student.IDNO, student.FIRSTNAME, subject.SUBJECT FROM student, subject GROUP BY subject.SUBJECT LIMIT 0 , 30

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• question about combinatorical

  - by davit-datuashvili

  here is task How many ways are there to choose from the set {1, 2, . . . , 100} three distinct numbers so that their sum is even? first of all sum of three numbers is even if only if 1.all number is even 2.two of them is odd and one is even i know that (n) = n!/(k!*(n-k)! (k) and can anybody help me to solve this problem

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• MySQL - generate numbers for groups of a result

  - by FreeIX

  I need a query to return this result: +---------+-----+-------+ | ref_nid | nid | delta | +---------+-----+-------+ | AA | 97 | 1 | | BB | 97 | 2 | | CC | 97 | 3 | | DD | 98 | 1 | | EE | 98 | 2 | | FF | 98 | 3 | +---------+-----+-------+ However, I do not have the delta column. I need to generate it for each nid group. In other words, I need an auto incremented number for each group of the result.

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• Computing e^(-j) in C..

  - by Erkan H

  I need to compute imaginary exponential in C. As far as I know, there is no complex number library in C. It is possible to get e^x with exp(x) of math.h, but how can I compute the value of e^(-j), where j = sqrt(-1)?

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• Find fields with certain characters

  - by Kemo

  I'm trying to SELECT fields with multiple dots ( . ) in their value. Exactly, I'm trying to find fields with a subdomain as an entry in domain column, e.g.; SELECT * FROM domains WHERE ( number of dots in domain value bigger than 1 ). Any suggestions ?

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• C# Dictionary Performance

  - by derek

  I am using a Dictionary to store data, and will be caching it. I would like to avoid server memory issues, and have good performance by limiting the size of the Dictionary<, either in size or number of entries. What is the best method of doing this? Is there another class I should be considering other than a Dictionary?

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• Doubling binary digits

  - by psihodelia

  How to double a number of binary digits in an integer? For example, if bin(x)="1001" then bin(y) must be "11000011". Is there any smart and fast algorithm ?

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• mySQL: How many rows in a table before performance is affected?

  - by Industrial

  Hi everybody, Is there a "known limit" for columns & rows in a mySQL table that when passed, it can be safe to say that performance is severely affected? I've think that I had heard that there is a "golden number" that you really dont want to exceed in either columns or rows in a table. - Or is it all about the size of the index and available RAM + CPU on the server? Thanks!

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• Reduce Triangle in DirectX 9

  - by Himadri

  Hello everyone, I have a 3D object with about 2000 or 3000 triangles. I want to reduce the number of triangle without affecting shape of object. for eg, I have two triangles, (1,1.5,2) (1.5,1.5,2) (1.7,2,2) (1.5,1.5,2) (1.7,2,2) (2,1.5,2) In this case these two triangle is same as a single triangle - (1,1.5,2) (2,1.5,2) (1.7,2,2) I dont want the manual method, But if there is any direct function or such thing which will reduce my triangle list. Thank You.

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• How can I select the required records?

  - by simple

  Tables: Product: [id, name, brand_id, is_published] Brand: [id, name, is_published] Awards: [id, name] ProductAwards [product_id, award_id] How do I select the list of PUBLISHED brands along with the number of AWARDS of brand's products that are Published. I am cool with all the part except issuing the "is_published" restriction when counting Awards. I hope this is clear; can anyone just suggest where to dig?

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• Haskell Input & Passing Values to Functions

  - by Pradeep

  putStrLn "Enter the Artist Name" art <- getLine putStrLn "Enter the Number of CD's" num <- getLine let test= buyItem currentStockBase art num printListIO (showcurrentList test) the values i have to pass for buyItem is buyItem currentStockBase "Akon" 20 but i want to send "Akon" to art and for 20 i want to send num it gives me this error ERROR file:.\Project2.hs:126 - Type error in application *** Expression : buyItem currentStockBase art num *** Term : num *** Type : [Char] *** Does not match : Int please help me

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