equivalence

Doesnt stl sort require a strict weak ordering to work?

由 ﹥＞﹥吖頭↗ 提交于 2019-12-10 17:56:05
问题 From http://stdcxx.apache.org/doc/stdlibref/less-equal.html -- You can pass a less_equal object to any algorithm that requires a binary function. For example, the sort() algorithm can accept a binary function as an alternate comparison object to sort a sequence. less_equal would be used in that algorithm in the following manner: vector<int> vec1; sort(vec1.begin(), vec1.end(),less_equal<int>()); -- Now I am confused, is the documentation above correct ? 回答1: You are right, std::sort requires

Are “unit-relevant” CSS property values with prepended zeroes equivalent to the corresponding “no-zeroes-prepended” values?

由 耗尽温柔 提交于 2019-12-10 16:23:56
问题 I was scanning some stylesheets when I noticed one which used a linear-gradient with rgba() color-stops in which the rgba numbers used multiple instances of 0 instead of just a single 0 : background-image:linear-gradient(to top left, rgba(000,000,000,0.1),rgba(100,100,100,1)); I hadn't seen multiple zeroes (instead of a single zero) occupying a single slot in the rgb/a color space before, but confirmed on CodePen this is valid. I then looked up the W3C definition of number here. To make a

What is the difference between equivalence and equality?

由 限于喜欢 提交于 2019-12-09 05:06:56
问题 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. 回答1: On cppreference.com i found the following quote: For the types that are both EqualityComparable and LessThanComparable, the C++ standard library makes a distinction between equality, which is the value of the

String.Format (.NET) equivalent in Java?

由 ≯℡__Kan透↙ 提交于 2019-12-07 02:20:08
问题 The String.Format in .NET (maybe just VB.NET) convert {0}, {1}, ... into determined String, for example: Dim St As String = "Test: {0}, {1}" Console.WriteLine(String.Format(St, "Text1", "Text2")) I've tried to search in both Google and StackOverflows, but they all return number-string format. 回答1: The other suggestions are certainly good, but are more in the style of printf and its lineage which are more recent additions to Java. The code you posted looks to be inspired by MessageFormat.

String.Format (.NET) equivalent in Java?

由 泄露秘密 提交于 2019-12-05 09:30:25
The String.Format in .NET (maybe just VB.NET) convert {0}, {1}, ... into determined String, for example: Dim St As String = "Test: {0}, {1}" Console.WriteLine(String.Format(St, "Text1", "Text2")) I've tried to search in both Google and StackOverflows, but they all return number-string format. The other suggestions are certainly good, but are more in the style of printf and its lineage which are more recent additions to Java. The code you posted looks to be inspired by MessageFormat . String format = "Test: {0}, {1}" System.out.println(MessageFormat.format(format, "Text1", "Text2")) I'm not

Equivalence between two automata

由 空扰寡人 提交于 2019-12-04 21:47:29
问题 Which is the best or easiest method for determining equivalence between two automata? I.e., if given two finite automata A and B, how can I determine whether both recognize the same language? They are both deterministic or both nondeterministic. 回答1: Two nondeterministic finite automota (NFA's) are equivalent if they accept the same language. To determine whether they accept the same language, we look at the fact that every NFA has a minimal DFA, where no two states are identical. A minimal

Equivalence between two automata

由 情到浓时终转凉″ 提交于 2019-12-04 06:14:44
Which is the best or easiest method for determining equivalence between two automata? I.e., if given two finite automata A and B, how can I determine whether both recognize the same language? They are both deterministic or both nondeterministic. Two nondeterministic finite automota (NFA's) are equivalent if they accept the same language. To determine whether they accept the same language, we look at the fact that every NFA has a minimal DFA, where no two states are identical. A minimal DFA is also unique. Thus, given two NFA's, if you find that their corresponding minimal DFA's are equivalent,

Overloading equivalence (==) operator for custom class in Swift

由 人走茶凉 提交于 2019-12-03 23:37:57
问题 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. 回答1: Add global functions. For example: class CustomClass { var id = "my id" } func ==(lhs: CustomClass, rhs: CustomClass) -> Bool { return lhs == rhs } func !=(lhs: CustomClass, rhs: CustomClass) -> Bool { return !(lhs == rhs) } To conform Equatable protocol in

What is the difference between equivalence and equality?

由 僤鯓⒐⒋嵵緔 提交于 2019-12-03 04:46:49
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 . On cppreference.com i found the following quote: For the types that are both EqualityComparable and LessThanComparable, the C++ standard library makes a distinction between equality, which is the value of the expression a == b and equivalence, which is the value of the expression !(a < b) && !(b < a). 来源： https:/

How to test the equivalence of maps in Golang?

由 穿精又带淫゛_ 提交于 2019-12-03 02:42:45
问题 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
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