All Questions

How do I create a regular expression that validates if a String is:

• a number
• [optional] ,decimal point
• [required if you eat] another number

Also:

• It does NOT have a dot .as a symbol for thousands.

I have tried to create it:

[0-9,]+[^.]

Debugx Demo

But the results:

22,33        CORRECTO
33.44        INCORRECTO
22,33...     CORRECTO // PERO DEBERIA SER INCORRECTO!!!
232.33dfdfd  CORRECTO // PERO DEBERIA SER INCORRECTO!!!

Expected results:

22,33        CORRECTO
225,3432     CORRECTO
33.44        INCORRECTO
22,33...     INCORRECTO
23,          INCORRECTO

Recently, with the departure of ECMAScript 2015 , the use of the reserved word was introduced, constwhich I understand is for constants.

I have tried it with some variables and everything works very well, like this:

'use strict';
const PI = 3.141516;
PI = 3.14;
console.log(PI);

Which returns the following error:

TypeError: Assignment to constant variable.

That is completely expected in a constant, but my doubt arises when I do the same thing with an object, like so:

const empleado = {
  nombre: 'Juan',
  profesion: 'Programador'
};
empleado.nombre = 'Pedro';
console.log(empleado);

Which to my surprise returns the object with the nombremodified node, like this:

{ nombre: 'Pedro', profesion: 'Programador' }

Ask

Shouldn't I get the same error when trying to modify an object that has been declared as a constant?

I am developing an android application and I don't want the screen to be rotated.

How do I disable the screen rotation option in android so that when the phone is rotated it stays vertical?

Let me explain, I want the regular expression to \wfind the characters [a-zA-Z_0-9áéíóúüñÁÉÍÓÚÜÑ]that, as you know, are part of what is considered a word in the Spanish language.

I thought it depended on the locale, but it doesn't, since even changing the CurrentCulture before executing the regular expression, it still doesn't give me the results with accented letters.

Thread.CurrentThread.CurrentCulture = New CultureInfo("es-ES")

I have also used the alternative \p{L}with the same result.

I have looked at the options that can be put when executing regular expressions in .NET and there is one called RegexOptions.CultureInvariant, but it does not work for me because it is intended for case-sensitive string comparisons.

https://msdn.microsoft.com/en-us/library/yd1hzczs(v=vs.110).aspx#Anchor_11

I could use an ad-hoc expression [a-zA-Z_0-9áéíóúüñÁÉÍÓÚÜÑ], but it's longer, less readable, and I want to support more languages ​​in the future so I'd have to create a different one for each language.

What I am asking is if .NET has a list of languages ​​with the characters that are part of a word and only passing the locale for example "es-ES" would already interpret \wor \p{L}as[a-zA-Z_0-9áéíóúüñÁÉÍÓÚÜÑ]

I would like to know how I can do this as I could implement a caching mechanism for a sample application written in C# . This implementation is intended to end up as a library.

I know that EntityFramework has a somewhat similar mechanism to Auto Refresh and that NHibernate has cache levels. But I have a vague idea of ​​the concept and no idea how they work internally.

From the little research I know it has something to do with SQL Server Broker Service , where the service sends messages to MSMQ and from my application I pool against MSMQ but I never saw an implementation example.

Update

Well, to contextualize where this applies to, it is an industry-wide Warehouse Management System . The system has about 15 services running at the same time and asking the database all the time about the movement of the products and containers that are in the respective storage areas.

For what reason are there 15 services running?

The warehouse that uses this management system has several lines with barcode scanners reading about 10 labels per minute at peak times, and each of these lines has a particular service because the logic varies in each line and in each logic makes a verification to different services and the existence of said barcode in the database.

In addition, it has 10 AGVs (Automated Guided Vehicles) that have services such as: Task issuer for AGV , Task Scheduler , etc. and these are constantly pooling against the database looking for new tasks to perform. The same happens with the terminals of forklift operators who constantly pool the database in search of new container movement orders.

It remains to add that reception, dispatch and storage are also automated and each of these has its own service(s).

Why doesn't the system have middleware ?

I must clarify that this system, of such magnitude, does not have middleware (which would be a glory because it would solve many architectural problems) since it is a system adapted to an old system from around 1995. and other systems where production was limited for those dates. Today, it had to be upgraded and we are having scalability issues to increase production.

To understand this, the BL and the DAL are on the same server and, therefore, it does not give me the possibility to distribute the data query load.

I clarify that the application has the client made in WinForms where they connect to the services (console application).