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• Accenture question - Find the only unpaired element in the array

  - by karank

  You have been given an array of size 2n+1 that have n pair of integers(can be +ve, -ve or 0) and one unpaired element. How would you find the unpaired element.

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• Interpolating in HSV color space

  - by user146780

  I have an HSV color A at 3/10 of a line and HSV color B at 9/10 of a line. I'm making multistep gradients and for example if I wanted to find the color at 6/10ths of a line, how could I interpolate these HSV colors? I'm firmiliar with the technique for rgb but not HSV. I should also add that my HSV's are integers H(0,360) S(0,100) V(0,100). Thanks

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• JavaScript Question for IE6

  - by Lijo

  Hi Team, I have a javascript requirement. I will pass a comma separated string into a function. I need to ensure that it contains only integers (without decimals) and the value is less than 2147483648. Could you please help me ? Note:: I am working on IE 6 Thanks Lijo

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• Number of different elements in an array.

  - by AB

  Is it possible to compute the number of different elements in an array in linear time and constant space? Let us say it's an array of long integers, and you can not allocate an array of length sizeof(long). P.S. Not homework, just curious. I've got a book that sort of implies that it is possible.

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• How to create, read and write XML C# windows forms?

  - by Audel

  I want to create an XML file through c# and need to read and write on it. The data I need to store are just strings and integers.

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• Display the message depend on time

  - by sairam333

  Hi i am getting current time using the following statements Calendar cal = Calendar.getInstance(); SimpleDateFormat sdf = new SimpleDateFormat(DATE_FORMAT_NOW); String b= sdf.format(cal.getTime()); Now I want to display the message as if time is before 12 Good Morning like that......... for this how can i compare that time with integers 1 , 12,16 like that. Thanks in advance

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• How to translate legacy system colors to (A)RGB?

  - by Paul Sasik

  I have a list of color values encoded as signed integers in a legacy INI file that I need to translate into (A)RGB values with .NET. An INI example: [INI_Section] Color=-2147483633 Doing something like: Color.FromArgb(-2147483633) gives an alpha-blended version of a color that is not at all what I expect. Is there a .NET method for translating these legacy colors properly? Note that pInvoke to OlePro32.dll is not an option.

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• Help me understand this "Programming pearls" bitsort program

  - by ardsrk

  Jon Bentley in Column 1 of his book programming pearls introduces a technique for sorting a sequence of non-zero positive integers using bit vectors. I have taken the program bitsort.c from here and pasted it below: /* Copyright (C) 1999 Lucent Technologies */ /* From 'Programming Pearls' by Jon Bentley */ /* bitsort.c -- bitmap sort from Column 1 * Sort distinct integers in the range [0..N-1] */ #include <stdio.h> #define BITSPERWORD 32 #define SHIFT 5 #define MASK 0x1F #define N 10000000 int a[1 + N/BITSPERWORD]; void set(int i) { int sh = i>>SHIFT; a[i>>SHIFT] |= (1<<(i & MASK)); } void clr(int i) { a[i>>SHIFT] &= ~(1<<(i & MASK)); } int test(int i){ return a[i>>SHIFT] & (1<<(i & MASK)); } int main() { int i; for (i = 0; i < N; i++) clr(i); /*Replace above 2 lines with below 3 for word-parallel init int top = 1 + N/BITSPERWORD; for (i = 0; i < top; i++) a[i] = 0; */ while (scanf("%d", &i) != EOF) set(i); for (i = 0; i < N; i++) if (test(i)) printf("%d\n", i); return 0; } I understand what the functions clr, set and test are doing and explain them below: ( please correct me if I am wrong here ). clr clears the ith bit set sets the ith bit test returns the value at the ith bit Now, I don't understand how the functions do what they do. I am unable to figure out all the bit manipulation happening in those three functions. Please help.

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• Why does sorted list have to have a key value pair?

  - by clawson

  If I just want a sorted list of just dates, integers, or doubles is it really necessary to have to define a SortedList(of Integer, Integer)? Seems intriguing to me, but may just be trival. I'd prefer just to use a SortedList(of Integer). (This question is in relation to the .Net generic collections)

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• PHP: Shortest way to check if a variable contains positive integer?

  - by NAVEED

  I want to check if user input a positive integer number. 1 = true +10 = true .1 = false -1 = false 10.5 = false Just a positive number. No characters. No special character. No dot. No minus sign. I tried is_int() function but it is returning false even on positive integers. Is there a string to int problem? Thanks

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• How does the hash part in hash maps work?

  - by sub

  So there is this nice picture in the hash maps article on Wikipedia: Everything clear so far, except for the hash function in the middle. How can a function generate the right index from any string? Are the indexes integers in reality too? If yes, how can the function output 1 for John Smith, 2 for Lisa Smith, etc.?

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• haskell recursive function

  - by snorlaks

  Hello, Please help me with writing function which takes two arguments : list of ints and index (int) and returns list of integers with negative of value on specified index position in the table MyReverse :: [Int]-Int-[Int] for example myReverse [1,2,3,4,5] 3 = [1,2,-3,4,5] if index is bigger then length of the list or smaller then 0 return the same list. Thanks for help

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• x86 assembly abs() implementation?

  - by Greg C.

  I need to get the difference of 2 signed integers. Is there an ABS() function in x86 assembly language so I can do this. Any help would be greatly appreciated.

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• Combine two numbers into one. Example: 123 and 456 become 123456

  - by Bei337

  In C++, how do I combine (note: not add) two integers into one big integer? For example: int1 = 123; int2 = 456; Is there a function to take the two numbers and turn intCombined into 123456?

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• Question on First Order Logic formula

  - by none

  Hi, Can someone validate the following. I am supposed to 'write a formula asserting that for every number there's a unique next number...true for integers for instance' L(x,y) means x is smaller than y the intended Domain is the Integer numbers Can I give ∀x ∀y [ x<y ⇒ ( ∃z : z<x ∨ y<z ) ] Thanks

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• best algorithm for swapping?

  - by ashish yadav

  i have heard from a friend of mine that the best algorithm for swapping is " (a^=b^=a^=b)" where a and b are two integers to be swapped. but when i applied this using c language it resulted in crashing. can anyone of you fine people explain the possible reason for that? please suggest the best algorithm for swapping. thank you!!!!

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• Read more numbers in a line in Python

  - by VaioIsBorn

  Let say i want to read the integers a, b and c from stdin (in one line, do not need to press return after each number). In c++, i would just do: cin a b c; How to do this in Python ?

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• number of comparisons of binary search

  - by user307496

  What is the total number of comparisons necessary to locate all the n sorted distinct integers in an array using binary search, I think it is nlogn, but I am not sure. What do u guys think?

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• How do I cast a string to integer and have 0 in case of error in the cast with PostgreSQL?

  - by silviot

  In postgres I have a table with a varchar column. The data is supposed to be integers and I need it in iteger type in a query. Some values are empty strings. The following: SELECT myfield::integer FROM mytable yields ERROR: invalid input syntax for integer: "" How can I query a cast and have 0 in case of error during the cast in postgres?

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• Can primary index be a CHAR in MySQL?

  - by FFish

  My primary indexes are unique reference numbers like 002345 and 000023. If I format them as integers I loose my zero's. They need to be 6 digits. Can I use CHAR? I don't need any auto increments.

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• How to store different site parameters in database with Rails?

  - by Igor Alexandrov

  Hello. There are a lot of ways to store site preferences in database. But what if I need to manage datatypes. So some preferences will be boolean, others strings, others integers. How can I organize such store?

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• For what else I can use MySQL?

  - by ilhan

  I know how to store data in MySQL. Shortly, I know the basics: design, storing strings, integers, date. Is there something else that could be done/achieve with MySQL? Like some kind of functions, temprory bla blas? I don't know. (I know PHP)

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• How to convert a table column to another data type

  - by holden

  I have a column with the type of Varchar in my Postgres database which I meant to be integers... and now I want to change them, unfortunately this doesn't seem to work using my rails migration. change_column :table1, :columnB, :integer So I tried doing this: execute 'ALTER TABLE "table1" ALTER COLUMN "columnB" TYPE integer USING CAST(columnB AS INTEGER)' but cast doesn't work in this instance because some of the column are null... any ideas?

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• how to write a program in c

  - by user292489

  how to write a program that reads in a list of integers from a text file, print them out to another file in a formatted fashion?

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• PHP: Shortest way to check if a textbox contains positive integer (not float)?

  - by NAVEED

  I want to check if user input a positive integer number. 1 = true +10 = true .1 = false -1 = false 10.5 = false Just a positive number. No characters. No special character. No dot. No minus sign. I tried is_int() function but it is returning false even on positive integers. Is there a string to int problem? Thanks

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