Specify the number, sum, and minimum of arrays to get a set of random numbers
The original requirements are as follows:
Given sum SUM(A), given minimum number M, given length S of sequence, and precision P of each number in sequence,
It is required that each number in the sequence must meet the requirements of a > = m, accur ...
In web applications, generally, some small-scale data and business changes, and other relevant business data also need to change. In this case, observer pattern is very suitable.
Observer mode is usually implemented by using an interface called observer. If other classes want to introduce observers, they need to implement this interface
For e ...
Jenkins is easy to get cramped sometimes. I configured the code in tomcat, which is not easy to use. I started because of the problem of nginx's reverse proxy, but later found out that Tomcat became a demon. The solution is to copy my Tomcat configuration, and then add parameters and modify on my basis.
Posted by rfrid on Thu, 02 Apr 2020 22:30:04 +0200
The derivation expression is actually to simplify some loop judgment operations, etc
How many ways can you generate a list of numbers 1-10?
>>> l = [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 ]
[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
>>> l = 
>>> for x in range( 1, 11 ):
... l.append( x )
Posted by tinuviel on Thu, 02 Apr 2020 21:38:33 +0200
Title gate: http://www.lydsy.com/JudgeOnline/problem.php?id=4710
Topic analysis: at first, I didn't have a clue at all. Later, I found out that this is just like the second kind of stirling number?
First of all, consider how to do without the condition that everyone should take at least one specialty. Because different speci ...
Posted by Paulkirkewalker on Tue, 31 Mar 2020 19:10:03 +0200
With PHP7.4, there is an extension that I think is very useful: PHP FFI (Foreign Function interface), which refers to a description in PHP FFI RFC:
For PHP, FFI provides a way to write PHP extensions and bindings to C libraries in pure PHP.
Yes, FFI provides high-level languages to call each other directly. For PH ...
Posted by Johan Beijar on Mon, 30 Mar 2020 12:07:14 +0200
PHP Clean Code (Part I)
Use default parameters instead of short circuit operation or condition judgment
This is not good because $breweryName can be NULL
function createMicrobrewery($breweryName = 'Hipster Brew Co.'): void
This approach is easier to understand than the above, but it needs to contr ...
Posted by Kiubbo on Fri, 27 Mar 2020 11:33:02 +0100
Software Engineer Guidelines for Robert C.Martin's Clean Code The same applies to PHP.It is not a guide to coding style, it guides us to write readable, reusable, and decomposable code in PHP.
Not all guidelines must be strictly followed, even some have become common conventions.This is just a guideline, many of which are years of ex ...
Posted by Kalland on Fri, 27 Mar 2020 09:16:14 +0100
Posted by Demonic on Thu, 26 Mar 2020 04:11:33 +0100
Posted by scheols on Thu, 26 Mar 2020 03:33:25 +0100