javaniceday.com

Different ways to use for loops in Node.js

November 8th, 2023
For many developers, Node.js can be an overwhelming and daunting technology to learn. Fortunately, one simple way to ease into the Node.js world is through the use of for loops. For loops allow you to iterate or repeat certain tasks or code until a certain condition is met. Here we will look at three different types of for loops available in Node.js and how they can be used in your Node.js applications.

Here are three examples of for loops in Node.js:
1. Standard For Loop:
```
for (let i = 0; i < 5; i++) {
  console.log('Iteration:', i);
}
```
In this example, the loop iterates from 0 to 4. During each iteration, the value of i is printed to the console.
1. For…of Loop:
```
const fruits = ['apple', 'banana', 'orange'];
for (const fruit of fruits) {
  console.log('Fruit:', fruit);
}
```
In this example, the loop iterates over each element in the fruits array. The value of fruit represents the current element in each iteration.
1. For…in Loop:
```
const person = {
  name: 'John',
  age: 30,
  city: 'New York'
};
for (const key in person) {
  console.log(key + ':', person[key]);
}
```
In this example, the loop iterates over the properties of the person object. The key variable represents each property name, and person[key] retrieves the corresponding value.

These are just a few examples of the for loop variations you can use in Node.js to iterate and perform tasks.
Share this:
X
LinkedIn
Reddit
Email
Like Loading…
What are AWS Lambda Functions?

November 7th, 2023
AWS Lambda is a serverless computing technology offered by Amazon Web Services (AWS). It allows you to run your code without the need to provision or manage servers. AWS Lambda functions are pieces of code that can be executed in response to certain events or triggers. These functions can be written in various programming languages such as Python, Node.js, Java and more.

The main advantage of using AWS Lambda functions is that you only pay for the actual compute time that your code consumes, rather than paying for servers that might remain idle. This helps in reducing costs and enables automatic scaling based on the demand of your applications.

Lambda functions can be triggered by various events, such as changes to data in an Amazon S3 bucket, updates to a DynamoDB table, API Gateway requests, scheduled AWS CloudWatch events, or custom events produced by other AWS services.

AWS Lambda functions are commonly used in serverless architectures, where different functions can be connected together to build complex applications without the need for managing underlying infrastructure. It provides a highly scalable, event-driven architecture that allows developers to focus on writing code and delivering business value without worrying about managing servers.

AWS Lambda functions support various programming languages such as:
1. Python: You can write Lambda functions using Python, which offers simplicity and flexibility for a wide range of use cases.
2. Node.js: Node.js is a popular JavaScript runtime that allows you to write server-side applications using JavaScript. It offers fast execution and easy integration with other AWS services.
3. Java: Lambda functions can be written in Java, providing the ability to leverage existing Java libraries and frameworks. Java is known for its performance and scalability.
4. C#: If you prefer using C# for your serverless applications, AWS Lambda supports it. You can write Lambda functions in C# using the .NET Core runtime.
5. Custom Runtimes: AWS Lambda also offers support for custom runtimes, which means you can run functions written in other programming languages not natively supported by Lambda. This feature allows you to bring your own runtime and use it to execute your code.
These language options give you the flexibility to choose the programming language that best suits your needs and preferences when developing AWS Lambda functions.

AWS Lambda functions and Amazon Elastic Container Service (ECS) are both powerful services provided by Amazon Web Services (AWS) for running and executing code, but they differ in key aspects.

AWS Lambda is a serverless computing service that allows you to run your code without the need to provision or manage servers. With Lambda, you can write functions in various programming languages, such as Python, Node.js, Java, C#, and more. Lambda functions are event-driven and can be automatically triggered by events, such as changes in data in an S3 bucket or updates to a DynamoDB table. The main advantage of Lambda is its ability to scale automatically and charge you only for the compute time that your code consumes. This enables you to focus on writing code and delivering business value without worrying about managing servers or infrastructure.

On the other hand, Amazon ECS is a container orchestration service that allows you to run and manage Docker containers. ECS provides a highly scalable and customizable way to deploy and manage your containerized applications. With ECS, you have more control over the underlying infrastructure and can easily manage the cluster, networking, and storage options. You can use ECS to run long-running applications, microservices, and batch workloads. It supports integrations with other AWS services, such as Elastic Load Balancing, Elastic Block Store, and IAM.

When deciding between Lambda functions and ECS, you should consider the following factors:
1. Event-driven vs. Long-running: Lambda functions are ideal for event-driven, short-lived tasks that require rapid scaling and quick response times. ECS is better suited for long-running applications or services that require more control over the infrastructure and the ability to manage containers directly.
2. Scaling and Cost: Lambda automatically scales based on the incoming events and charges you only for the compute time consumed. ECS allows you to manually scale the underlying infrastructure, and you pay for the resources provisioned, regardless of the container utilization.
3. Infrastructure Management: With Lambda, AWS takes care of managing server infrastructure, automatic scaling, and availability. ECS requires you to manage the underlying infrastructure, including the cluster, EC2 instances, load balancers, and scaling policies.
4. Code Flexibility: Lambda supports multiple programming languages and is well-suited for smaller functions. ECS allows you to run any code within a container as long as it is compatible with Docker.
In summary, AWS Lambda is a great choice for event-driven, short-lived tasks where automatic scaling and billing based on usage are important. Amazon ECS provides more flexibility and control over the infrastructure, making it suitable for long-running applications and services that require custom networking and storage configurations.

AWS Lambda be cost-effective for many use cases. One of the key advantages of using Lambda is that you only pay for the actual compute time that your code consumes, rather than paying for servers that might remain idle. This helps in reducing costs and enables automatic scaling based on the demand of your applications.

The pricing for AWS Lambda is based on the number of requests made to your functions and the duration of the execution. There is no charge for idle time, and you are only billed for the time your code takes to execute.

The cost of Lambda functions can vary depending on factors such as the number of requests, the amount of memory allocated to the function, and the execution time. AWS offers a pricing calculator that can help you estimate your costs based on your specific requirements.

It’s important to note that while Lambda functions can be cost-effective for certain workloads, they may not be the most cost-efficient solution for all use cases. If you have long-running or consistently high-traffic workloads, other compute services like
Share this:
X
LinkedIn
Reddit
Email
Like Loading…
How to skip duplicate rules in Salesforce

November 7th, 2023
It is possible to skip or bypass duplicate rules in Apex when using Database.insert sentence.

To bypass duplicate rules in Salesforce using Apex, you can use the Database.DMLOptions class. This class allows you to specify options for your data manipulation language (DML) operations, such as inserting records.

As an example, let’s say you have a rule to avoid inserting two leads with the same email. You can bypass that rule with the following Apex code:
```
// Create an instance of Database.DMLOptions
Database.DMLOptions dml = new Database.DMLOptions();

// Set the Duplicate Rule Header options
dml.DuplicateRuleHeader.allowSave = true;
dml.DuplicateRuleHeader.runAsCurrentUser = true;

// Create a new lead with a duplicate email
Lead duplicateLead = new Lead(Email='existing@email.com');

// Insert the lead and pass the DMLOptions
Database.SaveResult sr = Database.insert(duplicateLead, dml);

// Check if the insertion was successful
if (sr.isSuccess()) {
    System.debug('Duplicate lead has been inserted in Salesforce!');
}
```
By setting dml.DuplicateRuleHeader.allowSave to true, you are overriding the duplicate rule and allowing the record to be saved. Additionally, setting dml.DuplicateRuleHeader.runAsCurrentUser to true ensures that the duplicate rule is evaluated based on the current user’s permissions.

Please note that bypassing duplicate rules should be used with caution and only when necessary. Make sure to carefully consider the implications before implementing this in your code.
Share this:
X
LinkedIn
Reddit
Email
Like Loading…
How to generate Database.SaveResult mocks in Salesforce

November 7th, 2023
In Salesforce, Database.SaveResult is a class that represents the result of a database operation, such as inserting, updating, deleting, or upserting records. It provides information about the success or failure of the operation, along with any error messages or error codes associated with it.

When performing DML (Data Manipulation Language) operations, such as inserting or updating records, the Database.SaveResult class can be used to retrieve detailed information about each record’s status. It contains properties such as isSuccess to indicate if the operation was successful, getErrors to retrieve any error messages associated with the operation, and getStatusCode to fetch the error code, among others.

By analyzing the Database.SaveResult objects, developers can handle errors, perform custom logic, and provide appropriate feedback to users. This allows for better error handling and ensures data integrity in Salesforce applications.

Let’s say you have a method that processes database errors and you want to add some coverage
```
public static void processDatabaseSaveResults(Database.SaveResult sr){
   // do something
}
```
Now you need to cover that method but you realized that Database.SaveResult cannot be instantiated due to the error Type cannot be constructed: Database.SaveResult. One way to generate instances of that class can be:
```
Database.SaveResult sr = (Database.SaveResult) JSON.deserialize('{"success":false,"errors":[{"message":"test error message","statusCode":"DUPLICATES_DETECTED"}]}', Database.SaveResult.class);
```
And then you can test it as:
```
@isTest 
static void shouldTestSomething() {
        // given
        Database.SaveResult sr = (Database.SaveResult) JSON.deserialize('{"success":false,"errors":[{"message":"test error message","statusCode":"DUPLICATES_DETECTED"}]}', Database.SaveResult.class);
        
        // when
        processDatabaseSaveResults(sr);
        
        // then 
        System.assert(...);
        
    }
```
Share this:
X
LinkedIn
Reddit
Email
Like Loading…
Por qué mi BYD carga hasta 6.2 kw/h?

November 4th, 2023
La capacidad de carga de un vehículo eléctrico, como tu BYD Dolphin, puede verse limitada por varios factores. Si estás obteniendo una capacidad de carga de hasta 6.2 kW/h en lugar de los 20 kW/h esperados, esto podría estar relacionado con algunas posibles razones:
1. Limitaciones del cargador: Es posible que los cargadores que has estado utilizando no sean capaces de suministrar más de 6.2 kW/h. En este caso, revisar las especificaciones del cargador y asegurarte de que sea compatible con una capacidad de carga mayor podría ayudar a resolver el problema.
2. Limitaciones del vehículo: Algunos vehículos eléctricos tienen una capacidad de carga máxima predeterminada por el fabricante. Verifica el manual del propietario o ponte en contacto con el soporte técnico de BYD para conocer si el Dolphin tiene alguna limitación de carga.
3. Problemas de infraestructura: Dependiendo de dónde se encuentre la infraestructura de carga, es posible que la capacidad de carga esté limitada por la capacidad de suministro eléctrico de la ubicación. Si ha utilizado diferentes cargadores en diferentes lugares y ha experimentado la misma capacidad de carga limitada, esto puede ser un factor a considerar.
Mi experiencia: Noté que mi auto cargaba solo a 6.2 kw/h a pesar de que lo conectaba a cargadores de mucho más potencia. Esto me paso con tres cargadores en dos días. Le comente a quien me vendió el auto, quien muy amable me respondió que es una configuración que viene de fabrica para cuidar la batería cuando enchufamos a los cargadores de corriente alterna.

Con los cargadores de corriente continua es otra historia, vamos a poder cargar mucho mas rápido. En el caso de algunos BYD Dolphin, hasta 60 kw/h. Para otras marcas y modelos podría llegar hasta 120 kw/h.

Esto debemos tenerlo en cuenta a la hora de planificar un viaje ya que con los cargadores de corriente alterna vamos a tener una espera considerablemente más larga.
Share this:
X
LinkedIn
Reddit
Email
Like Loading…
Cómo instalar apps en un BYD Dolphin

November 4th, 2023
Un automóvil BYD Dolphin es un vehículo eléctrico compacto diseñado para conducir en ciudad. Tiene un diseño elegante y moderno con una autonomía de hasta 400 kilómetros con una sola carga. El automóvil cuenta con características de seguridad avanzadas, que incluyen múltiples bolsas de aire, control electrónico de estabilidad y una cámara de visión trasera y otra delantera. El interior es espacioso y confortable, con amplio espacio para las piernas y la cabeza tanto para el conductor como para los pasajeros. El sistema de infoentretenimiento incluye una pantalla táctil, conectividad Bluetooth y navegación. En general, el automóvil BYD Dolphin es una opción confiable y ecológica para quienes desean reducir su huella de carbono sin sacrificar el estilo o la comodidad.

Si eres un orgulloso propietario de un automóvil BYD Dolphin y deseas mejorar tu experiencia de navegación, instalar Waze puede ser una excelente opción. Waze es una popular aplicación de navegación que proporciona actualizaciones de tráfico en tiempo real y funciones útiles. La hermosa pantalla que tienes en tu auto BYD Dolphin es solo una tableta con sistema operativo Android, por lo que instalar aplicaciones sería fácil, pero no es el caso. Sería bueno tener Google Play para instalar fácilmente aplicaciones en el sistema de información y entretenimiento de nuestro automóvil, pero lamentablemente no es el caso cuando se trata de automóviles BYD, así que aquí hay una guía paso a paso sobre cómo instalar Waze y otras apps en su automóvil BYD Dolphin.

A falta de Apple Carplay y Android Auto…

Hasta al menos hoy, Septiembre de 2023, BYD, el fabricante de automóviles chino, no ha adoptado Apple CarPlay o Android Auto en sus vehículos. Sin embargo, la disponibilidad de funciones como Apple CarPlay puede variar de un modelo de automóvil y de un mercado a otro. La decisión de admitir o no Apple CarPlay (o cualquier otro sistema de información y entretenimiento) en un automóvil generalmente la toma el fabricante del automóvil y puede depender de varios factores.

Consideraciones de costos: la implementación de Apple CarPlay o Android Auto puede implicar tarifas de licencia, requisitos de hardware adicionales o costos continuos de desarrollo y mantenimiento, que podrían no alinearse con la estrategia comercial de BYD.

Regulaciones y licencias: puede haber problemas regulatorios o de licencia que puedan afectar la inclusión de Apple CarPlay. Los fabricantes de automóviles deben cumplir varios requisitos legales y de licencia al integrar software de terceros.

Actualizaciones y mantenimiento: los fabricantes de automóviles son responsables de mantener y actualizar el software y los sistemas de sus vehículos. Es posible que algunos prefieran tener control total sobre el software de sus automóviles en lugar de depender de sistemas externos como Apple CarPlay.

Prioridades y asociaciones: BYD puede haber tomado decisiones estratégicas para centrarse en otras características o asociaciones, priorizando diferentes funcionalidades u opciones de conectividad para sus clientes.

Es esencial consultar el sitio web oficial de BYD o comunicarse con su atención al cliente para obtener la información más actualizada sobre su soporte para Apple CarPlay o Android Auto, ya que la situación puede haber cambiado desde mi última actualización en Septiembre de 2023. Los fabricantes de automóviles pueden actualizar sus modelos y características con regularidad, por lo que lo que era cierto en el pasado puede no serlo hoy.

Para instalar Waze en un automóvil BYD Dolphin, siga estos pasos:
- Consigue un pendrive. Idealmente vacío.
- Consigue el APK de Waze, GBox y cualquier otra que quieras instalar.
- Crea una carpeta llamada third party apps en pendrive. Es importante respectar el nombre third party apps, de lo contrario no detectará nuestras apps
- Copiar el APK a la carpeta third party apps
- Conectar el pendrive en el puerto USB de su automóvil.
- Apagar y encender el auto.
- Te pedirá una contraseña, escribe: 20211231
- Navegar a la carpeta de pases de terceros
- Selecciona el APK de Waze y toque instalar
- Espere unos segundos para instalar la aplicación.
- Después de eso, verás Waze instalado como cualquier otro. otra aplicación
Notas importantes: si no te pide la contraseña cuando conectas el pendrive, intenta apagar y encender tu BYD Car. El nombre de la carpeta DEBE SER third party apps; de lo contrario, no funcionará.

Complete la configuración de Waze: siga el proceso de configuración dentro de la aplicación Waze, que puede implicar crear una cuenta, otorgar los permisos necesarios y configurar los ajustes deseados.

Si Waze no te pide permiso para utilizar tu GPS, tendrás que hacerlo manualmente desde los ajustes del dispositivo de infoentretenimiento.

Disfrute de Waze en su automóvil BYD Dolphin: una vez completada la configuración, ahora puede usar Waze para la navegación en su automóvil BYD Dolphin.

Tenga en cuenta que la disponibilidad y compatibilidad de Waze pueden variar según el modelo específico de su automóvil BYD Dolphin y su sistema de información y entretenimiento. Para obtener orientación o soporte adicional, recomendamos consultar el manual del automóvil o comunicarse con el servicio de atención al cliente del representante de BYD en tu pais.
Share this:
X
LinkedIn
Reddit
Email
Like Loading…
How to disable parallel tests in Salesforce

October 19th, 2023
Running tests in parallel can consume more system resources and potentially hit governor limits more frequently. By running tests sequentially, you may be less likely to exceed these limits, which can lead to test failures and complications.

To disable parallel tests in Salesforce, you can follow these steps:
1. Log in to your Salesforce organization.
2. Click on the Setup gear icon in the top-right corner.
3. In the Quick Find box, type “Apex Test Execution” and select the “Apex Test Execution” option.
4. On the Apex Test Execution page, you will see the “Options…”
5. In the Test Options dialog box, deselect the “Disable Parallel Apex Testing” option.
6. Click on the “Save” button to apply the changes.
Here is a screenshot that illustrates this process:

How to disable parallel apex testing execution

By following these steps, you have successfully disabled parallel tests in Salesforce. Now, when running the tests, they will execute sequentially instead of running in parallel across classes.

Parallel test execution can provide significant time savings and speed up the testing process, especially for large test suites. Salesforce introduced parallel test execution to improve overall development efficiency. Therefore, you should carefully consider whether to disable parallel execution based on the specific needs and characteristics of your Salesforce environment and your test suite. It may be necessary in some cases but unnecessary in others.
Share this:
X
LinkedIn
Reddit
Email
Like Loading…
Switch between different Node versions

October 13th, 2023
To switch between different Node versions using nvm (Node Version Manager), you can follow the next steps.

List all the available installed versions:
```
$ nvm list
->     v14.20.1
       v18.16.0
        v19.9.0
         system
default -> 14 (-> v14.20.1)
```
Select the one you want to use
```
$ nvm use 18.16.0
```
Also it is possible to just say:
```
$ nvm use 18
```
Set the default one:
```
$ nvm alias default 18.16.0
```
Make sure it worked:
```
$ nvm list
       v14.20.1
->     v18.16.0
        v19.9.0
```
Or:
```
$ node -v
v18.16.0
```
Share this:
X
LinkedIn
Reddit
Email
Like Loading…
No puedo desconectar el cargador de mi vehículo eléctrico BYD.

October 10th, 2023
Si no puedes desenchufar el cargador de tu vehículo eléctrico BYD, no debes forzarlo, podrías dañarlo. Debería poder desconectar el cargado casi sin ningún esfuerzo. Esto puede deberse a problemas de software, como una falta de comunicación entre el vehículo eléctrico (EV) y la estación de carga.

Algunos pasos que puede intentar para resolver el problema:

Encender y apagar el vehículo: esto es de la vieja escuela y la primera acción que debes realizar.

Desbloquear el vehículo: algunos vehículos eléctricos requieren que el vehículo esté desbloqueado para liberar el cargador. Intente desbloquear las puertas manualmente o usando el llavero asociado con su vehículo eléctrico BYD. En ocasiones requiere una especie de “doble clic” en el botón de desbloqueo, desde la llave o desde el propio coche.

Desbloqueo alternativo o de emergencia: muchos vehículos eléctricos tienen un botón o palanca de liberación cerca del puerto de carga. Localice este mecanismo de liberación y presiónelo o tire de él para desbloquear el cargador de su vehículo eléctrico.

Revisar el manual: siempre hay un mecanismo alternativo, normalmente algo oculto que debe activarse.

Comunícate con el servicio de atención al cliente: si los pasos anteriores no funcionan y aún no puedes desconectar el cargador, se recomienda comunicarse con el servicio de atención al cliente de BYD o consultar el manual del usuario para obtener más orientación. Ellos podrán ayudarle a resolver el problema.

Mi experiencia: hace unos días me enfrenté a este problema en un cargador público, no podía desconectar el cargador del auto. Intenté todos los pasos anteriores y nada funcionó hasta que me comuniqué con atención al cliente. Me dijeron que mi BYD tiene un cable de desconexión debajo del capó que debes tirar hacia atrás en estos casos.

Recuerda, la seguridad siempre debe ser una prioridad. Si no está seguro o no se siente cómodo con alguno de los pasos mencionados anteriormente, lo mejor es buscar asistencia profesional para desconectar el cargador de su vehículo eléctrico BYD.
Share this:
X
LinkedIn
Reddit
Email
Like Loading…
BYD charger got stuck and cannot be unplugged

October 10th, 2023
If you are unable to unplug the charger from your BYD electric vehicle, you mustn’t force it, you could damage it. You should be able to unplug the charger without almost any effort if everything is working well but sometimes there could be even software issues such as a miscommunication between the electric vehicle (EV) and the charging station.

Let’s see first some generic solutions and then we may go for more specific ones related to BYD cars. A few steps you can try to resolve the issue.

Turn on and off the vehicle: this is old school and the first action you have to make.

Unlock the vehicle: Some electric vehicles require the vehicle to be unlocked to release the charger. Try unlocking the doors either manually or using the key fob associated with your BYD electric vehicle. Sometimes it requires kind of a “double click” on the unlock button, even from the key or from the car itself.

Press the release button: Many electric vehicles have a release button or lever near the charging port. Locate this release mechanism and press or pull it to unlock the charger from your electric vehicle.

Read the manual. There’s always a fallback mechanism, typically something under the hood that needs to be triggered.

Contact customer support: If the above steps do not work and you are still unable to unplug the charger, it is recommended to contact BYD customer support or refer to the user manual for further guidance. They will be able to assist you in resolving the issue.

My experience: a couple of days ago I faced this issue, I was unable to unplug the charger from the car. I tried all the steps above and nothing worked for me until I contacted customer support. They told me my BYD card has a think cord under the hood that you need to pull up in these cases.

Remember, safety should always be a priority. If you are uncertain or uncomfortable with any of the steps mentioned above, it is best to seek professional assistance to disconnect the charger from your BYD electric vehicle.
Share this:
X
LinkedIn
Reddit
Email
Like Loading…

Share this:

Share this:

Share this:

Share this:

Share this:

A falta de Apple Carplay y Android Auto…

Share this:

Share this:

Share this:

Share this:

Share this: