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• Remove a single non-unique value from a sequence in F#

  - by mavnn

  I have a sequence of integers representing dice in F#. In the game in question, the player has a pool of dice and can choose to play one (governed by certain rules) and keep the rest. If, for example, a player rolls a 6, 6 and a 4 and decides to play one the sixes, is there a simple way to return a sequence with only one 6 removed? Seq.filter (fun x -> x != 6) dice removes all of the sixes, not just one.

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• Python references

  - by hekevintran

  Can someone explain why the example with integers results in different values for x and y and the example with the list results in x and y being the same object? x = 42 y = x x = x + 1 print x # 43 print y # 42 x = [ 1, 2, 3 ] y = x x[0] = 4 print x # [4, 2, 3] print y # [4, 2, 3] x is y # True

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• sort an array such that one half of the array has even numbers in ascending order and the other half

  - by nd81

  Design an algorithm with min time and space here is my solution - assume a array of N elements with 32 bit integers use a bit array to set the appropriate bits the array is sorted now assign even numbers to the first half of the array in ascending order assign odd numbers to the second half of the array in descending order any better solution ?

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• How can I find the dimensions of a matrix in Python?

  - by PBD10017

  How can I find the dimensions of a matrix in Python. Len(A) returns only one variable. Edit: Hi Thanks. close = dataobj.get_data(timestamps, symbols, closefield) Is (I assume) generating a matrix of integers (less likely strings). I need to find the size of that matrix, so I can run some tests without having to iterate through all of the elements. As far as the data type goes, I assume it's an array of arrays (or list of lists).

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• Parallel computation of the median of a large array

  - by recipriversexclusion

  I got asked this question once and still haven't been able to figure it out: You have an array of N integers, where N is large, say, a billion. You want to calculate the median value of this array. Assume you have m+1 machines (m workers, one master) to distribute the job to. How would you go about doing this? Since the median is a nonlinear operator, you can't just find the median in each machine and then take the median of those values.

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• Is there a 128 or 256 bit double class in .net?

  - by AKRamkumar

  I have an application that I want to be able to use large numbers and very precise numbers. For this, I needed a precision interpretation and IntX only works for integers. Is there a class in .net framework or even third party(preferably free) that would do this? Is there another way to do this?

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• Haskell and random numbers

  - by John D.

  Hi, I've been messing with Haskell few days and stumbled into a problem. I need a method that returns a random list of integers ( Rand [[Int]] ). So, I defined a type: type Rand a = StdGen -> (a, StdGen). I was able to produce Rand IO Integer and Rand [IO Integer] ( (returnR lst) :: StdGen -> ([IO Integer], StdGen) ) somehow. Any tips how to produce Rand [[Int]]?

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• Finding the product of each of the (n-1) subsets of a given array

  - by guirgis

  Hey everybody. Given an array of n integers, i need to find the product of each of the (n-1) subsets i.e: ith subset = the product of all the elements except the ith element itself. e.g: S = {1,0,3,2}; subset_product(1) = 0*3*2=0; subset_product(2) = 1*3*2=6; etc. So Any help?

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• how to pass an array from a asp.net mvc controller action back to javascript using jquery / ajax

  - by oo

  Here is my jQuery code: $.get('/Home/GetList', function(data) { debugger; $('#myMultiSelect').val(values); }); Here is my controller code: public ActionResult GetList(int id) { int[] bodyParts = _repository.GetList(id); //how do i return this as an array back to javascript ?? } if I have the GetList function return an array of integers, how do I return this to the jQuery function?

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• Is this SQL is valid?

  - by Beck

  UPDATE polls_options SET `votes`=`votes`+1, `percent`=ROUND((`votes`+1) / (SELECT voters FROM polls WHERE poll_id=? LIMIT 1) * 100,1) WHERE option_id=? AND poll_id=? Don't have table data yet, to test it properly. :) And by the way, in what type % integers should be stored in database? Thanks for the help!

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• Intger encoding and decoding problem

  - by aASDASD

  I have a long list of integers, and i need to reduce this down to a single integer. The integer list can be anywhere from 0 to 300 ints long (about). I need to be able to encode/decode. Is there a better option than a lookup table?

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• MYSQL autoincrement a column or just have an integer, difference?

  - by David19801

  Hi, If I have a column, set as primary index, and set as INT. If I don't set it as auto increment and just insert random integers which are unique into it, does that slow down future queries compared to autincrementing? Does it speed things up if I run OPTIMIZE on a table with its primary and only index as INT? (assuming only 2 columns, and second column is just some INT value) (the main worry is the upper limit on the autoincrement as theres lots of adds and deletes in my table)

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• new Integer vs valueOf

  - by LB

  Hi, I was using Sonar to make my code cleaner, and it pointed that I'm using new Integer(1) instead of Integer.valueOf(1). Because it seems that valueOf does not instantiate a new object so is more memory-friendly. How can valueOf not instantiate a new object ? How does it work ? Is this true for all integers ? thanks.

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• What are the standard practices for throwing Javascript Exceptions?

  - by T.R.

  w3schools says that exceptions can be strings, integers, booleans, or objects, but the example given doesn't strike me as good practice, since exception type checking is done through string comparison. Is this the preferred method of exception handling in Javascript? Are there built-in exception types (like NullPointerException)? (if so, what are they, what kind of inheritance do they use, and are they preferred over other options?)

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• java random percentages

  - by erw

  I need to generate n percentages (integers between 0 and 100) such that the sum of all n numbers adds up to 100. If I just do nextInt() n times, each time ensuring that the parameter is 100 minus the previously accumulated sum, then my percentages are biased (i.e. the first generated number will usually be largest etc.). How do I do this in an unbiased way?

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• finding middle element of an array

  - by senthil

  Hi all, I came cross a question in my interview. Question: Array of integers will be given as the input and you should find out the middle element when sorted , but without sorting. For Example. Input: 1,3,5,4,2 Output: 3 When you sort the given input array, it will be 1,2,3,4,5 where middle element is 3. You should find this in one pass without sorting. Any solutions for this?

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• [C++] Converting Integer to a Byte Representation

  - by bobber205

  How can I convert a integer to it's byte representation. I want to take an integer and return a vector that has contains 1's and 0's of the integers byte representation. I'm having a heck of a time trying to do this myself so I'd thought I would ask to see if there was a built in library function that could help. Thanks!

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• Performance difference between labels and frames with gotoAndPlay/Stop()?

  - by Typeoneerror

  Title pretty much is the question. Is there a performance difference between using string labels in gotoAndStop/Play [gotoAndStop("fire")] and integers [gotoAndStop(5)]?

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• Converting a string number into sequence of digits - .Net 2.0

  - by NLV

  Given a string string result = "01234" I've want to get the separate integers 0,1,2,3,4 from the string. How to do that?

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• What are the standard practices for throwing JavasScript Exceptions?

  - by T.R.

  w3schools says that exceptions can be strings, integers, booleans, or objects, but the example given doesn't strike me as good practice, since exception type checking is done through string comparison. Is this the preferred method of exception handling in JavaScript? Are there built-in exception types (like NullPointerException)? (if so, what are they, what kind of inheritance do they use, and are they preferred over other options?)

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• How to extract List<int> from Dictionary<int, string>?

  - by DaveDev

  I have a method that takes a List<int>, which is a list of IDs. The source of my data is a Dictionary<int, string> where the integers are what I want a list of. Is there a better way to get this than the following code? var list = new List<int>(); foreach (var kvp in myDictionary) { list.Add(pair.Key); } ExecuteMyMethod(list);

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• Does this definition create an array in Javascript?

  - by As

  in my jQuery code, i am using var a = [23, 34, 45, 33]; is 'a' considered an array of integers?

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• How can i optimize this python code

  - by RandomVector

  def maxVote(nLabels): count = {} maxList = [] maxCount = 0 for nLabel in nLabels: if nLabel in count: count[nLabel] += 1 else: count[nLabel] = 1 #Check if the count is max if count[nLabel] > maxCount: maxCount = count[nLabel] maxList = [nLabel,] elif count[nLabel]==maxCount: maxList.append(nLabel) return random.choice(maxList) nLabels contains a list of integers. The above function returns the integer with highest frequency, if more than one have same frequency then a randomly selected integer from them is returned. E.g. maxVote([1,3,4,5,5,5,3,12,11]) is 5

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• Performance of vector::size() : is it as fast as reading a variable?

  - by zoli2k

  I have do an extensive calculation on a big vector of integers. The vector size is not changed during the calculation. The size of the vector is frequently accessed by the code. What is faster in general: using the vector::size() function or using helper constant vectorSize storing the size of the vector? I know that compilers usually able to inline the size() function when setting the proper compiler flags, however, making a function inline is something that a compiler may do but can not be forced.

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• Permutation of Strings in C++

  - by cam

  I'm looking for just a simple method for permutating strings/integers in C++. I can easily do it in C#, but I'm just learning C++ and can't seem to find the right methods. Can someone show me a simple example that will find all permutations of an integer? And then the exact same for a string?

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