Programmer Group

Maximum sub segment sum Problem: given the sequence a[1],a[2],a[3],..., a[n] composed of N integers (possibly negative numbers), find the maximum value of the sum of sub segments of the sequence such as a[i]+a[i+1] +... + a[j]. When all the given integers are negative, the sub segment sum is defined as 0. According to this definition, the optim ...

ShardingCore ShardingCore is easy to use, simple, high-performance and universal. It is an extended solution for tables and databases under the efcore ecosystem. It supports all versions of efcore2 +, all databases of efcore2 +, custom routing, dynamic routing, high-performance paging and read-write separation, If you like this component or i ...

Before talking about the persistent segment tree, you need to know what the segment tree is. If you still don't know the segment tree, you can take a look at the template I wrote about the segment tree and attach the blog address here: (63 messages) segment tree template_ AC__dream blog - CSDN blog We know that the segment tree supports modifi ...

1. Background In this article, I summarized almost all the extension interfaces of Spring & springboot, as well as the usage scenarios of each extension point. And sorted out the sequential call graph of all extensible points from being loaded to the final initialization of a bean in spring. Thus, we can also see how beans are loaded int ...

Reproduced at: https://www.cnblogs.com/tp1226/p/8453854.html \[QAQ \] We often see the file "_init_. Py" in the module directory of python, so what is its function? 1. Identify that the directory is a python module package If you use python's IDE for development, if the file exists in the directory, the directory will be recognized a ...

1, Localstreaminenvironment Localstreaminenvironment is a subclass of streaminexecutionenvironment. It runs programs locally, multithreaded, and in the JVM that instantiates localstreaminenvironment. It generates an embedded Flink cluster in the background and executes programs on the cluster. When instantiating this environment, it uses the de ...

What is Flyweight concept Flyweight Pattern is a structural pattern, which is mainly used to reduce the performance consumption of object creation and destruction, so as to reduce the occupation of memory. Object oriented language can bring some flexibility and expansibility to our development, and it is more in line with people's way of thin ...

1. The structures in golang can be compared directly. The bottom layer calls the memequal function to compare the memory. Memequal is implemented by assembly.   2. Only values are passed in golang. For example, when a slice is used as a formal parameter of a function, it is also a value transfer. The underlying data structure of the slice is: ...

Principle of Redis implementing distributed lockWe talked about the application of Redis in the actual business scenario. Now let's learn about the application of Redisson functional scenario, that is, the implementation scenario of distributed locks that we often use.The concept of distributed lock will not be described in this paper.• in ...

        gcc compiles a single file. makefile can compile a single file or multiple files according to programming rules. Refer to the videos on the network and the posts of great God, and sort out the following that you will use. makefile basic syntax: 1, Syntax format:         Goal: dependency &nbs ...