R language modeling for multivariate statistical analysis

Characteristic: It includes several indicators, and the variation shows different aspects of the evaluation object To make an overall evaluation of the evaluated object, use a general indicator to explain the general level of the evaluated object Principles of index system construction System comprehensiveness Stable com ...

Posted on Wed, 15 Apr 2020 09:05:06 -0700 by jsim

From Delphi to Go -- Method

Method of structure Delphi The method of Delphi structure is almost the same as that of class. The main difference is the memory management and visibility. //Definition type TMyStruct = record No: Integer; Name: string; function ToString: string; end; //Realization function TMyStruct.ToString: string; begin Result := Format('N ...

Posted on Tue, 03 Dec 2019 16:02:58 -0800 by NoDoze

How to load dynamic link library (DLL) written by oneself in C ා

This paper mainly talks about how to gradually load the dynamic link library written in C + + language in C ා and how to match the data types of C ා and C + + language when importing I. background In the development of new projects, new languages are used to develop C ා and new technical solutions web services. However, in new projects, some ol ...

Posted on Fri, 22 Nov 2019 11:22:25 -0800 by dan_t

About the pit of TField.DataSize

When querying data from the database, sometimes it is necessary to obtain the size of the field content in advance, and then process it according to the situation. For things like ADO that return TField, you can use the DataSize property, but!!! There is a deep pit here! First look at the following code: if ADOQuery.FieldByName('Test').DataSize ...

Posted on Wed, 30 Oct 2019 07:46:52 -0700 by GeorgeMoney

Delphi - Create SuperDll Continuous Updates

Delphi SuperDll As a 5-year Delphi, Delphi has always been regarded as the king of desktop applications, and I believe other Delphis also think so. However, slowly I found that the common way of Delphi development can cause a serious bloated code, especially in the case of large MDI projects, multi-person development at the same time. For ex ...

Posted on Wed, 04 Sep 2019 23:19:30 -0700 by Rodders

# Learning Notes: CentOS 7 Learning Twenty: The Basis of shell Scripting

Catalog Learning Notes: CentOS 7 Learning Twenty: The Basis of shell Scripting 20.1 shell Basic Grammar 20.1.1 What is shell? 20.1.2 Programming Language Classification 20.1.3 What is shell script 20.2 SHELL Variables and Their Application 20.2.1 shell variable 20.2.2 User Defined ...

Posted on Tue, 25 Jun 2019 11:54:47 -0700 by yodasan000

JAVA Quick Start-Object-Oriented Three Characteristics-Polymorphism

Tips: Polymorphism literally means "multiple states". In object-oriented languages, many different implementations of interfaces are polymorphism. Referring to Charlie Calverts'description of polymorphism, polymorphism is a technique that allows you to set a parent object to one or more of its children as ...

Posted on Wed, 15 May 2019 16:24:45 -0700 by samip1983

Delphi's interface-based multicast listener mode (observer mode)

This article is from: http://www.cnblogs.com/hezihang/p/6083555.html. Delphi uses interface to design modules, which can reduce the coupling between modules and facilitate expansion and maintenance. This paper provides a monitor mode based on IInterface (observer mode, subscriber mode) to implement an automatic multicast. The following program ...

Posted on Wed, 20 Mar 2019 22:39:26 -0700 by tablex