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JavaScript. How to Compare Input Arrays

由 我怕爱的太早我们不能终老 提交于 2019-12-01 07:34:09
问题 I'm stuck with this problem for 3 days now... Someone please help me. Challenge 5 Construct a function intersection that compares input arrays and returns a new array with elements found in all of the inputs. function intersection(arrayOfArrays) { } console.log(intersection([[5, 10, 15, 20], [15, 88, 1, 5, 7], [1, 10, 15, 5, 20]])); // should log: [5, 15] 回答1: You could reduce the array by filtering with just checking if the other array contains the value. This works for arrays with unique

Java Comparator given the name of the property to compare

由 烂漫一生 提交于 2019-12-01 07:15:43
My problem is this; I have to order a table of data. Each row of the table is an object (lets call it TableObject) stored in a List. Each column of data is a property of the class (usually a String). I have to do the typical ordering of data when the user clicks on any column. So I thought about changing the List to a TreeSet and implementing Comparator in my TableObject. The problem comes when I try to reorder the TreeSet. The compare is fairly easy at first (cheeking for exceptions in parseInt have been omitted): public int compare(TableObject to1, TableObject to2){ TableObject t1 = to1;

How do I Compare two char[] arrays for equivalency?

由 醉酒当歌 提交于 2019-12-01 07:05:04
问题 Right now, I have two char arrays, foo1[] and foo2[] . When I convert them to string and output to the console, they BOTH appear as bar . I know that I can do something like this: int g; for (int i=0;i<length.foo1;i++) { // loop from 0 to length of array if (foo1[i]=foo2[i]) { // if foo1[0] and foo2[0] are the same char g++; // increment a counter by 1 } else // otherwise... { i=100; // set i to something that will halt the loop } if (g = length.foo1) { // if the incremented counter = length

How to write a compare function for qsort from stdlib?

由 前提是你 提交于 2019-12-01 06:22:15
I have a structure: struct pkt_ { double x; double y; double alfa; double r_kw; }; typedef struct pkt_ pkt; A table of these structures: pkt *tab_pkt; tab_pkt = malloc(ilosc_pkt * sizeof(pkt)); What I want to do is to sort tab_pkt by tab_pkt.alfa and tab_pkt.r : qsort(tab_pkt, ilosc_pkt, sizeof(pkt), porownaj); Where porownaj is a compare function, but how to write it? Here is my "sketch" of it: int porownaj(const void *pkt_a, const void *pkt_b) { if (pkt_a.alfa > pkt_b.alfa && pkt_a.r_kw > pkt_b.r_kw) return 1; if (pkt_a.alfa == pkt_b.alfa && pkt_a.r_kw == pkt_b.r_kw) return 0; if (pkt_a.alfa

How to compare A to Á on the iPhone

由 吃可爱长大的小学妹 提交于 2019-12-01 06:22:12
问题 I need to compare 2 strings, looking at the first letter only. Is there a method to compare A to Á, and recognize it as A, without the ´ ? 回答1: NSString has a diacritic-insensitive comparison mode which will do what you're after. // should return NSOrderedSame, i.e. identical [@"Apple" compare:@"Ápple" options:NSDiacriticInsensitiveSearch] If you want it to be case-insensitive as well: // ditto [@"APPLE" compare:@"Ápple" options:NSDiacriticInsensitiveSearch | NSCaseInsensitiveSearch] 来源：

ActionScript Comparing Arrays

由 生来就可爱ヽ(ⅴ＜●) 提交于 2019-12-01 06:15:34
how can i evaluate whether my test array is equal to my static constant DEFAULT_ARRAY? shouldn't my output be returning true? public class myClass extends Sprite { private static const DEFAULT_ARRAY:Array = new Array(1, 2, 3); public function myClass() { var test:Array = new Array(1, 2, 3); trace (test == DEFAULT_ARRAY); } //traces false Macke has already pointed out the problem. The == operator will tell you (for reference types such as Array objects) if two variables point to the same object. That's clearly not the case here. You have 2 different objects, that happen to have the same content

Join two hashtables to make one

由 被刻印的时光 ゝ 提交于 2019-12-01 06:04:22
I have two hash tables and I need to compare them. Let me explain my problem : [hashtable]$User = @{ "Jack" = "AdminLA, AdminUSA"; "John" = "AdminAustralia"; "Sarah" = "AdminIceland"; "Arnold" = "AdminUSA"; "Maurice" = "AdminAustralia, AdminCanada"; } [hashtable]$Profil = @{ "AdminLA" = "P1"; "AdminIceland" = "P2"; "AdminUSA" = "P3"; "AdminCanada" = "P4"; "AdminAustralia" = "P5" ; "AdminCroatia" = "P6"; } I want to have this kind of result : Key Value --- ----- Jack P1, P3 John P5 Sarah P2 Arnold P3 Maurice P5, P4 Actually, I have only one value (I haven't succeeded to have multiple values.

How to compare two data frames/tables and extract data in R?

由 你说的曾经没有我的故事 提交于 2019-12-01 05:38:50
In attempt to extract mismatches between the two data frames below I've already managed to create a new data frame in which mismatches are replaced. What I need now is a list of mismatches: dfA <- structure(list(animal1 = c("AA", "TT", "AG", "CA"), animal2 = c("AA", "TB", "AG", "CA"), animal3 = c("AA", "TT", "AG", "CA")), .Names = c("animal1", "animal2", "animal3"), row.names = c("snp1", "snp2", "snp3", "snp4"), class = "data.frame") # > dfA # animal1 animal2 animal3 # snp1 AA AA AA # snp2 TT TB TT # snp3 AG AG AG # snp4 CA CA CA dfB <- structure(list(animal1 = c("AA", "TT", "AG", "CA"),

ActionScript Comparing Arrays

由 不羁岁月 提交于 2019-12-01 05:29:54
问题 how can i evaluate whether my test array is equal to my static constant DEFAULT_ARRAY? shouldn't my output be returning true? public class myClass extends Sprite { private static const DEFAULT_ARRAY:Array = new Array(1, 2, 3); public function myClass() { var test:Array = new Array(1, 2, 3); trace (test == DEFAULT_ARRAY); } //traces false 回答1: Macke has already pointed out the problem. The == operator will tell you (for reference types such as Array objects) if two variables point to the same

How to write a compare function for qsort from stdlib?

由 主宰稳场 提交于 2019-12-01 05:27:27
问题 I have a structure: struct pkt_ { double x; double y; double alfa; double r_kw; }; typedef struct pkt_ pkt; A table of these structures: pkt *tab_pkt; tab_pkt = malloc(ilosc_pkt * sizeof(pkt)); What I want to do is to sort tab_pkt by tab_pkt.alfa and tab_pkt.r : qsort(tab_pkt, ilosc_pkt, sizeof(pkt), porownaj); Where porownaj is a compare function, but how to write it? Here is my "sketch" of it: int porownaj(const void *pkt_a, const void *pkt_b) { if (pkt_a.alfa > pkt_b.alfa && pkt_a.r_kw >
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