numbers

I have strings like AS_!SD 2453iur ks@d9304-52kasd I need to get the 2 frist numbres of the string: for that case will be: 2453 and 9304 I don't have any delimiter in the string to try a split, and the length of the numbers and string is variable, I'm working in C# framework 4.0 in a WPF. thanks for the help, and sorry for my bad english This solution will take two first numbers, each can have any number of digits string s = "AS_!SD 2453iur ks@d9304-52kasd"; MatchCollection matches = Regex.Matches(s, @"\d+"); string[] result = matches.Cast<Match>() .Take(2) .Select(match => match.Value)

I want capture Rank from this code : $RankStr = 'var trafficstatsSnippet = "/site/trafficstats;pysa1bpbPOVl6Wm5d4Zv4nKXKdM%3D /aahoonet.com/?adult=&category=&rank=1234567";' I use this code : $NewPOS = strpos($RankStr, "rank="); $SRank = substr($RankStr, $NewPOS + 5, 10); echo $SRank; because of RANK code variable from (1 - 25,000,000) , i use above code by selecting maximum 10 charachters after starting position of rank= plus 5 further index. so this function return 1234567"; and after that i want to grab this number from string. trying preg_match_all or regex but becasue of nofamiliarity

I am trying to write to an Excel 2003 spreadsheet using c# 3.5. However I am unable to get this to function correctly across different country settings. The country settings are either English or German. These two settings have different decimal and thousands settings. Everything works fine unless a user has changed the decimal and thousands separators in the International settings of the Options screen. Can anybody help as I feel I can no longer see the wood for the trees and am missing something obvious. Summary: Data retrieved from an access database. Read by c# application and written to

My web application deals with strings that need to be converted to numbers a lot - users often put commas, units (like cm, m, g, kg) and currency symbols in these fields so what I want to do is create a string extension method that cleans the field up and converts it to a decimal. For example: decimal myNumber = "15 cm".ToDecimal(); Are you expecting users of different 'cultures' to use your application? If so it's better to factor in the user's regional settings: static decimal ToDecimal(this string str) { return Decimal.Parse(str, CultureInfo.CurrentCulture); } Or you could replace every

I want to manipulate really big numbers and I am trying to work with arrays. I have already implemented the multiplication operation, but now I want to implement the division operation. I was wondering which algorithm(s) should I use? Is it possible to use the Newton–Raphson division algorithm or maybe should I use the algorithm that we learned in the school? PS: I know that there are many libraries that work with big numbers, but I want to do this for practice. Spektre These are my favorite algorithms I use: Binary division Look here: http://courses.cs.vt.edu/~cs1104/BuildingBlocks/divide.030

I've written code in Python to calculate sum of amicable numbers below 10000: def amicable(a, b): total = 0 result = 0 for i in range(1, a): if a % i == 0: total += i for j in range(1, b): if b % j == 0: result += j if total == b and result == a: return True return False sum_of_amicables = 0 for m in range (1, 10001): for n in range (1, 10001): if amicable(m, n) == True and m != n: sum_of_amicables = sum_of_amicables + m + n Code is running more than 20 minutes in Python 2.7.11. Is it ok? How can I improve it? optimized to O(n) def sum_factors(n): result = [] for i in xrange(1, int(n**0.5) + 1