equals

How to check if two ranges value is equal

大憨熊 提交于 2019-12-02 08:33:26
I want to merge cells in columns, if there is the same value in whole row. Eg. If A1:G1 range is the same as A2:G2 I want to merge A1:A2 cells, B1:B2 to G1:G2. With my code below I get run time error 13: type mismatch. I'm assuming, that problem is with checking equality of two ranges. Dim i As Long, j As Long, row as Long row = Cells(Rows.Count, 6).End(xlUp).row For i = row To 7 Step -1 If Range(Cells(i, 7), Cells(i, 24)).Value = Range(Cells(i - 1, 7), Cells(i - 1, 24)).Value Then For j = 7 To 24 Step 1 Range(Cells(i, j), Cells(i - 1, j)).Merge Next j End If Next i The question is, how to

Overriding equals for CopyOnWriteArraySet.add and remove

我们两清 提交于 2019-12-02 08:20:39
I have classes like below class A { @Override public boolean equals(Object other) { return true } } Class B extends A { } Class C extends A { @Override public boolean equals(Object other) { if ((other != null) || (other instanceOf B)) return false; } } In my main() I have this following code Set<A> mySet = new CopyOnWriteArraySet<A>(); mySet.add(C); I want mySet to contain C at this point mySet.add(B); // #1 I want mySet to contain C & B at this point mySet.remove(B); // #2 I want mySet to contain C at this point I want to create a global queue where if object C exists in the queue B should be

How to implement IEquatable<T> when mutable fields are part of the equality - Problem with GetHashCode

假装没事ソ 提交于 2019-12-02 07:27:05
I am using Entity Framework in my application. I implemented with the partial class of an entity the IEquatable<T> interface: Partial Class Address : Implements IEquatable(Of Address) 'Other part generated Public Overloads Function Equals(ByVal other As Address) As Boolean _ Implements System.IEquatable(Of Address).Equals If ReferenceEquals(Me, other) Then Return True Return AddressId = other.AddressId End Function Public Overrides Function Equals(ByVal obj As Object) As Boolean If obj Is Nothing Then Return MyBase.Equals(obj) If TypeOf obj Is Address Then Return Equals(DirectCast(obj, Address

Should Equality Comparison of Float / Double Instance Variables in an Equals Method be Exact?

断了今生、忘了曾经 提交于 2019-12-02 04:12:18
问题 I'm overriding an equality method for an object. Let's say an odometer with a km variable stored as a double (along with some other variables not important for the example). public class Odometer { private double km; @Override public int hashCode() { final int prime = 31; int result = 1; long temp; temp = Double.doubleToLongBits(km); result = prime * result + (int) (temp ^ (temp >>> 32)); return result; } @Override public boolean equals(Object obj) { if (this == obj) return true; if (obj ==

Consistent Equals() results, but inconsistent TreeMap.containsKey() result

末鹿安然 提交于 2019-12-02 02:53:51
问题 I have the following object Node : private class Node implements Comparable<Node>(){ private String guid(); ... public boolean equals(Node o){ return (this == o); } public int hashCode(){ return guid.hashCode(); } public int compareTo(Node o){ return (this.hashCode() - o.hashCode()); } ... } And I use it in the following TreeMap : TreeMap<Node, TreeSet<Edge>> nodes = new TreeMap<Node, TreeSet<Edge>>(); Now, the tree map is used in a class called Graph to store nodes currently in the graph,

how does String.equals() work

自古美人都是妖i 提交于 2019-12-02 02:01:57
I have been trying to understand how some of API methods work below is a snippet of equals method of java.lang.String class Can someone out there tell me how actually the code is comparing two strings. I get the significance of count, but what does offset signify. how are these variables getting values ? Like when i create a String. how are these initialized. a detailed line by line description and also how and when the instance variables, value, count, offset etc are initialized ?? public boolean equals(Object anObject) { 1014 if (this == anObject) { 1015 return true; 1016 } 1017 if (anObject

how does String.equals() work

爷,独闯天下 提交于 2019-12-02 01:48:53
问题 I have been trying to understand how some of API methods work below is a snippet of equals method of java.lang.String class Can someone out there tell me how actually the code is comparing two strings. I get the significance of count, but what does offset signify. how are these variables getting values ? Like when i create a String. how are these initialized. a detailed line by line description and also how and when the instance variables, value, count, offset etc are initialized ?? public

Check objects equality without equals overriding in java [closed]

人走茶凉 提交于 2019-12-02 01:39:25
Are there any utils in java which allow to check objects equality without equals overriding? For some reasons I don't want to provide my class with equals method. I need something like SomeUtils.equals(a,b) in my unit test which compares all object fields (via reflection I guess). You could use EqualsBuilder.reflectionEquals(this, obj); in Apache Commons EqualsBuilder 来源: https://stackoverflow.com/questions/30195291/check-objects-equality-without-equals-overriding-in-java

overriding equals method when dealing with inheritance

ⅰ亾dé卋堺 提交于 2019-12-02 01:33:55
I have been reading about how best to override the equals method when dealing with subclasses and here I have found quite a few posts. They recommend different ways of implementing a solution using instanceof or getClass() to compare objects of different sub classes. However with reference to Effective Java, my understanding is (and I am new to this so I may well be wrong!) Bloch argues that in the end both can be problematic, “There is no way to extend an instantiable class and add a value component while preserving the equals contract, unless you are willing to forgo the benefits of object

Equals, GetHashCode, EqualityComparers and fuzzy equality

最后都变了- 提交于 2019-12-02 01:28:43
问题 For an object with properties A, B, C, D, StartDate and EndDate if I wanted to implement something where any two objects are equal if they have identical A, B and C and overlapping date range, how would that be done? I have tried creating an EqualityComparer like so public override bool Equals(RateItem x, RateItem y) { bool equal = true; if ((x.A != y.A || x.B != y.B || x.C != y.C || (x.StartDate < y.StartDate && x.EndDate <= y.StartDate) || (x.StartDate > y.StartDate && y.EndDate <= x