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In Objective-C Check an array of Boolean Values and see if at least ONE is YES

由 ￡可爱￡侵袭症＋ 提交于 2020-01-02 03:48:26
问题 I have a mutable array of Boolean values and I want to check to see if ANY of the values are YES. At present I am creating another array alongside this one which is always ALL False like so; [MyArray addObject:[NSNumber numberWithBool:switchInput]]; [MyAllNoArray addObject:[NSNumber numberWithBool:NO]]; The user does some bits and the some of the objects in MyArray may become YES, I then use the below to see if ANY are true or not. if([MyArray isEqualToArray:MyAllNoArray]) I am just wondering

Where is the inconsistency in this Icomparer that is causing a null reference?

由 为君一笑 提交于 2020-01-02 01:56:42
问题 I'm receiving a null object in my custom IComparer implementation despite no null entries in the collection it is being applied to. My understanding is this can be caused by inconsistencies in the IComparer implementation. I cannot spot where this could be happening in the following code. For reference the intent is that these are sorted by the 'correct' property first, then if they are the same, it sorts based on the 'tiebreakerDelta' property, which sorts closest to zero without going over.

Comparing long strings by their hashes

由 久未见 提交于 2020-01-02 01:54:48
问题 Trying to improve the performance of a function that compares strings I decided to compare them by comparing their hashes. So is there a guarantee if the hash of 2 very long strings are equal to each other then the strings are also equal to each other? 回答1: While it's guaranteed that 2 identical strings will give you equal hashes, the other way round is not true : for a given hash, there are always several possible strings which produce the same hash. This is true due to the PigeonHole

C# compare different Encoding pattern between UTF8 and UTF32 based on Md5

由 吃可爱长大的小学妹 提交于 2020-01-01 22:45:26
1 using System; 2 using System.Text; 3 using System.IO; 4 using System.Security.Cryptography; 5 6 static void Main(string[] args) 7 { 8 CompareFileGetBytes("lyf.txt"); 9 Console.ReadLine(); 10 } 11 12 static void CompareFileGetBytes(string fileFullName) 13 { 14 byte[] fileReadAllBytes = File.ReadAllBytes(fileFullName); 15 string fileReadAllBytesMd5 = GetBytesMd5(fileReadAllBytes); 16 17 string utf8Md5 = string.Empty; 18 using (StreamReader reader = new StreamReader(fileFullName)) 19 { 20 string textResult = reader.ReadToEnd(); 21 byte[] utf8Bytes = Encoding.UTF8.GetBytes(textResult); 22

How to compare two text files for the same exact text using BASH?

由 爷，独闯天下 提交于 2020-01-01 10:14:45
问题 Let's say I have two text files that I need to extract data out of. The text of the two files is as follows: File 1: 1name - randomemail@email.com 2Name - superrandomemail@email.com 3Name - 123random@email.com 4Name - random123@email.com File 2: email.com email.com email.com anotherwebsite.com File 2 is File 1's list of domain names, extracted from the email addresses. These are not the same domain names by any means, and are quite random. How can I get the results of the domain names that

Comparing objects in ruby

由 好久不见. 提交于 2020-01-01 10:07:05
问题 Consider this: class Aaa attr_accessor :a, :b end x = Aaa.new x.a, x.b = 1,2 y = Aaa.new y.a, y.b = 1,2 puts x == y #=>false Is there some way to check if all public attributes are equal in classes of same type? 回答1: class Aaa attr_accessor :a, :b def ==(other) return self.a == other.a && self.b == other.b end end x = Aaa.new x.a,x.b = 1,2 y = Aaa.new y.a,y.b = 1,2 y = Aaa.new y.a,y.b = 1,2 z = Aaa.new z.a,z.b = 1,3 x == y # => true x == z # => false 回答2: Aaa = Struct.new(:a, :b) x = Aaa.new

Comparing objects in ruby

由 霸气de小男生 提交于 2020-01-01 10:07:03
问题 Consider this: class Aaa attr_accessor :a, :b end x = Aaa.new x.a, x.b = 1,2 y = Aaa.new y.a, y.b = 1,2 puts x == y #=>false Is there some way to check if all public attributes are equal in classes of same type? 回答1: class Aaa attr_accessor :a, :b def ==(other) return self.a == other.a && self.b == other.b end end x = Aaa.new x.a,x.b = 1,2 y = Aaa.new y.a,y.b = 1,2 y = Aaa.new y.a,y.b = 1,2 z = Aaa.new z.a,z.b = 1,3 x == y # => true x == z # => false 回答2: Aaa = Struct.new(:a, :b) x = Aaa.new

Compare array values with others values from the same array

由 余生长醉 提交于 2020-01-01 09:16:45
问题 What I’m trying to achieve is that, it will loop trough the array. Then it will look if the items in the array are the same on three points: product_id, the size value and the color value. I want to create a new array where the items are listed, the only thing I don’t want is the duplicated values. I want that the duplicated values if they are the same on those three points that the quantity will be count together. Like if I have 3 items same product id same size and same color and both of

best way to compare between two-dimension integer arrays in java

由 ⅰ亾dé卋堺 提交于 2020-01-01 09:04:53
问题 I would like to know what is the best, fastest and easiest way to compare between 2-dimension arrays of integer. the length of arrays is the same. (one of the array's is temporary array) 回答1: Edan wrote: just need to see if the value is the same If you want to check that a[i][j] equals b[i][j] for all elements, just use Arrays.deepEquals(a, b) . 回答2: Look at java.util.Arrays; it has many array utilities that you should familiarize yourself with. import java.util.Arrays; int[][] arr1; int[][]

Check if current time is between two times, with the possibility of lapping days

由 泪湿孤枕 提交于 2020-01-01 05:43:07
问题 I have a system that accepts user submissions, and upon receiving a submission the system will go through all timeslots to find the appropriate timeslot. The problem is that it needs to be able to check against the start & end times if the end time laps to the next day. Take the following example: A timeslot begins at 10:30 PM on the current day and ends at 4:00 PM the next day. If the current time is between 10:30 PM and 11:59:59 PM, the submission will be assigned to that timeslot. However,
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