set-operations

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Set operations in DBIx::Class

What is the best way to perform set operations using DBIx::Class? I saw that one solution would be to create a Result Source based on my query, but my c开发者_StackOverflowonditions will be defined by[详细]

2023-03-26 13:46 分类：问答
Performing "Optimized" set Operations on java.util.ArrayList or in SQL

This is the first time I need to ask question to get my query solved before today previous threads were able to solve my queries.[详细]

2023-03-19 19:50 分类：问答
A generic set operations class i.e. intersection, union, minus etc

I want to write a C++ class that offers set operations that work on vectors of strings and vectors of my own data type.Are there any easy ways of doing this rather than writing a different function fo[详细]

2023-03-11 21:55 分类：问答
Need to find Basic Operations Sets Union/Intersect/Symmetric Difference JAVA

Need to finish implementing this to use UseSet class. Not sure if what I have implemented is 100% correct.[详细]

2023-02-23 18:45 分类：问答
How to perform set subtraction on arrays in C#?

What\'s the simplest way to perform a set subtraction given two arrays in C#? Apparently this is dead easy in Ruby. Basically I just want to remove the elements from array a that are in array b:[详细]

2023-02-12 19:11 分类：问答
What does `**` mean in the expression `dict(d1, **d2)`?

I am intrigued by the following python expression: d3 = dict(d1, **d2) The task is to merge 2 dictionaries into a third one, and the above expression accomplishes the task just fine. I am intereste[详细]

2022-12-20 14:05 分类：问答
Quickest way to find the complement of two collections in C#

I have two collections of type ICollection<MyType> called c1 and c2. I\'d like to find the set of items that are in c2 that are not in c1, where the heuristic for equality is the Id pro开发者_Py[详细]

2022-12-19 15:14 分类：问答
Finding Set Complement in Unix

Given this two files: $ cat A.txt$ cat B.txt 311 51 112 23 42 I want to find lines number that is in A \"BUT NOT\" in B.[详细]

2022-12-18 05:55 分类：问答