# equivalence

##### 如何在 Golang 中测试地图的等价性？(How to test the equivalence of maps in Golang?)

2021-06-10 15:25:18    分类:技术分享    testing   maps   go   equivalence   table-driven

##### “冲突可序列化”和“冲突等效”有什么区别？(What is the difference between “conflict serializable” and “conflict equivalent”?)

2021-06-09 09:47:35    分类:技术分享    database   conflict   serializable   equivalence

##### What is the difference between equivalence and equality?

What is the difference between equivalence and equality in C++? There is a very similar question here. However, this question is tagged with math, while I am interested in the meaning in C++ context. To see the terms in context: Scott Meyers uses them in an example in this video.

2021-05-24 12:27:06    分类:问答    c++   equality   equivalence

##### How should one proceed to prove (or find) if two regular expressions are same or equivalent?

For example, in an assignment given to me, we were asked to find out if two regular expressions are equal or not. (a+b+c)* and ((ab)**c*)* My question is how is one supposed to do that? If I draw the transition graphs for both and then run a few strings through it and show that both of the TGs are able to accept it, is that a sufficient proof ? If not, how do I do it? Is there a mathematical/axiomatic approach towards this? Thanks in advance. EDIT: There is another thing that I'd like to clear which is kind of related to this question. Are the two FAs depicted in the photo below the same? i.e

2021-05-18 01:04:27    分类:问答    regex   finite-automata   regular-language   equivalence

##### What is the difference between “conflict serializable” and “conflict equivalent”?

In database theory, what is the difference between "conflict serializable" and "conflict equivalent"? My textbook has a section on conflict serializable but glosses over conflict equivalence. These are probably both concepts I am familiar with, but I am not familiar with the terminology, so I am looking for an explanation.

2021-05-17 04:22:04    分类:问答    database   conflict   serializable   equivalence

##### How to test the equivalence of maps in Golang?

I have a table-driven test case like this one: func CountWords(s string) map[string]int func TestCountWords(t *testing.T) { var tests = []struct { input string want map[string]int }{ {"foo", map[string]int{"foo":1}}, {"foo bar foo", map[string]int{"foo":2,"bar":1}}, } for i, c := range tests { got := CountWords(c.input) // TODO test whether c.want == got } } I could check whether the lengths are the same and write a loop that checks if every key-value pair is the same. But then I have to write this check again when I want to use it for another type of map (say map[string]string). What I ended

2021-05-15 07:55:56    分类:问答    testing   maps   go   equivalence   table-driven

Is it possible to overload equivalence (==) operator for a custom class inside that custom class. However I know that it is possible to have this operator overloaded outside class scope. Appreciate any sample code. Thanks in advance.

##### 盒装原语和对等(Boxed Primitives and Equivalence)

2021-04-29 09:07:00    分类:技术分享    java   autoboxing   equivalence

##### 等效类测试与边界值测试(Equivalence Class Testing vs. Boundary Value Testing)

2021-04-28 16:31:05    分类:技术分享    testing   equivalence   black-box

##### Is JavaScript's double equals (==) always symmetric?

There are many cases in which JavaScript's type-coercing equality operator is not transitive. For example, see "JavaScript equality transitivity is weird." However, are there any cases in which == isn't symmetric? That is, where a == b is true and b == a is false?

2021-04-24 12:58:19    分类:问答    javascript   ecma262   comparison-operators   equivalence   symmetric