compare

What's the best way to determine whether two List<T> objects contain the same set of values, even if they are not in the same order? [duplicate]

由 拥有回忆 提交于 2019-12-04 06:32:13
问题 This question already has answers here : Compare two List<T> objects for equality, ignoring order [duplicate] (9 answers) Closed 4 years ago . I have two List<T> objects (where T is the same type for both objects), and I need to be able to determine whether they contain the same set of values, even if the values aren't in the same order. Do the objects have any built-in mechanisms to accomplish this, or do I need to write my own algorithm? Or perhaps, should I be using a different type of

NSString search whole text for another string

由 那年仲夏 提交于 2019-12-04 05:27:36
问题 I would like to search for an NSString in another NSString, such that the result is found even if the second one does not start with the first one, for example: eg: I have a search string "st". I look in the following records to see if any of the below contains this search string, all of them should return a good result, because all of them have "st". Restaurant stable Kirsten At the moment I am doing the following: NSComparisonResult result = [selectedString compare:searchText options:

几款程序员常用的辅助编程工具

由 不羁的心 提交于 2019-12-04 05:23:07
工欲善其事，必先利其器。对于每一个程序员来说，实用的编程辅助工具将会大大的提高编程速度，从而更加高效的完成工作。现在各大网络平台上，编程必备软件和工具泛滥成灾。初级开发人员要么找不到合适的工具，要么在寻找过程中浪费了大量的时间。下面小编结合用户推荐和软件下载量，给大家推荐五款程序员专用的辅助编程工具。 1 、Beyond Compare Beyond Compare是一款智能化的 文件比较工具 ，使用Beyond Compare只需用简单的命令和操作，即可开启最优质的对比体验，找出您感兴趣的差异，合并变化，然后同步文件，并生成报告。 Beyond Compare软件可以高效对比整个驱动器和文件夹，检查文件大小和修改时间。它可以逐字节完整验证每个文件，确保精确查找文件之间的差异部分，并且软件自带强大的过滤功能可以忽略次要差异，允许您只看到自己感兴趣的内容。 Beyond Compare注册码 获取地址。 2.NOTEPAD++ NOTEPAD++是一款优秀的文本编辑器，支持在MS Windows环境下运行的多种编程语言。NOTEPAD++支持超过50种编程、脚本和标记语言的语法高亮显示和代码折叠，能让用户迅速减小或扩大代码段以便查阅整个文档。用户也可以手动设置当前语言，覆盖默认语言。该程序还支持自动完成某些编程语言的API子集。 3 、Sublime Text Sublime

Fastest way of comparing strings in C

由 自古美人都是妖i 提交于 2019-12-04 05:16:12
问题 I wanted to know if there are even faster ways of comparing strings in C than using strcmp() , especially when I have to compare a string with multiple pre-defined strings in a switch statement fashion. In my application, the string to be compared can sometimes go as big as 1000 chars, so was just thinking if strcmp() is sufficient enough or if there exists better and efficient way which I am not familiar with. I am actually working on a low power embedded IoT project where more CPU cycles

find common elements in >2 files

由 筅森魡賤 提交于 2019-12-04 05:13:39
I have three files as shown below file1.txt "aba" 0 0 "aba" 0 0 1 "abc" 0 1 "abd" 1 1 "xxx" 0 0 file2.txt "xyz" 0 0 "aba" 0 0 0 0 "aba" 0 0 0 1 "xxx" 0 0 "abc" 1 1 file3.txt "xyx" 0 0 "aba" 0 0 "aba" 0 1 0 "xxx" 0 0 0 1 "abc" 1 1 I want to find the similar elements in all the three files based on first two columns. To find similar elements in two files i have used something like awk 'FNR==NR{a[$1,$2]++;next}a[$1,$2]' file1.txt file2.txt But, how can we find similar elements in all the files, when the input files are more than 2? Can anyone help? With the current awk solution, the output

Compare two NSDates

由 无人久伴 提交于 2019-12-04 05:08:04
How can I compare two NSDates and return the amount of time between them. For example: 2010-06-20 14:29:41 -0400 2010-06-20 14:53:29 -0400 should return something like: 23 or 24 (minutes), rounding the seconds because I don't really need the seconds. try something like: int intervall = (int) [date1 timeIntervalSinceDate: date2] / 60; Here the complete snippet to compare two NSDate which you may find more useful based on your query. NSCalendar *myCal = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]; NSString *str =@"12:15, 01 15 2012 AM"; NSDateFormatter *formatter = [

How does this comparator work?

由 跟風遠走 提交于 2019-12-04 04:27:54
问题 package vehicles_order; import java.util.ArrayList; import java.util.Collections; import java.util.Iterator; public class vehicles implements Comparable { String Vehicle; String Make; String Type; double Cost; public static void main(String[] args){ ArrayList cars = new ArrayList(); cars.add(new vehicles ("CAR","Peugot","3008",12500.00)); cars.add(new vehicles ("CAR","BMW","316",4995.00)); cars.add(new vehicles ("CAR","Ford","Fiesta",2995.00)); Collections.sort(cars); Iterator itr = cars

All-to-all setdiff on two numeric vectors with a numeric threshold for accepting matches

由 最后都变了- 提交于 2019-12-04 03:34:07
问题 What I want to do is more or less a combination of the problems discussed in the two following threads: Perform non-pairwise all-to-all comparisons between two unordered character vectors --- The opposite of intersect --- all-to-all setdiff Merge data frames based on numeric rownames within a chosen threshold and keeping unmatched rows as well I have two numeric vectors: b_1 <- c(543.4591, 489.36325, 12.03, 896.158, 1002.5698, 301.569) b_2 <- c(22.12, 53, 12.02, 543.4891, 5666.31, 100.1, 896

Compare List and return matches in c#

由 柔情痞子 提交于 2019-12-04 03:26:22
问题 What is the fastest and best way to compare 2 lists and return a match. Only one match is possible. List1 contains dynamic data from a database. The way I do it now : foreach (var item1 in List1) { foreach (var item2 in List2 ) { if(item2 == item1) string match = item1; } } I have a feeling like it can be done a lot faster. 回答1: Use Enumerable.Intersect. var matchItem = List1.Intersect(List2).First(); Not really sure how much it is faster to your current code, you can measure it using

Check to see if all variable are equal to the same value in c++ [duplicate]

由 試著忘記壹切 提交于 2019-12-04 03:15:14
问题 This question already has an answer here : Why comparing three variables together with == evaluates to false? (1 answer) Closed last month . What is the easiest way to compare multiple variable to see if they are all the same value? For example if var1 = 53 and I want to check if var2 or var3 is equal to var1 and each other? So far I have done this: if(row1==row2==row3==row4==col1==col2==col3==col4==diag1==diag2) cout << "It is a magic square"; else cout << "Not a magic square"; However this
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