I introduced to you the @Conditional annotation in Spring with the purpose of allowing us to define conditions for a bean to be initialized in the Spring container. We will need to implement the Condition interface with the abstract method matches() returning true or false… Read More
When working with applications that use the Spring framework, you will need to know how to declare and use Beans in the Spring container. Normally, we just need to declare Bean for a certain class and Spring will automatically create Bean for that class in… Read More
Scoped Value in Java is a Java feature that allows us to get immutable data anywhere in related code we want, without having to pass this data from this method to another method so that it can be used later in a method that needs… Read More
The ThreadLocal class in Java is a class that allows us to store and retrieve the values of variables in the same thread. As long as it’s the same thread, you can store a value and retrieve it whenever we want. You can initialize objects… Read More
Structured Concurrency in Java is an improvement of Java from Java 19, on implementing and maintaining code related to the execution of tasks consisting of many sub-tasks handled by multi-threading. This improvement makes our code easier to read, and controls how the execution of subtasks… Read More
In the previous tutorial, I introduced you how to work with .properties files using the Properties class. There are other needs related to configuration information of applications that this Properties class does not support, for example: Reusing properties that have been declared in other properties… Read More
.properties files are files used to configure information for the application. This is information that can change during the process of developing and deploying the application to the production environment. This information will be defined with key and value pairs in the .properties file, for… Read More
In the previous tutorial, I showed you how to type Query in GraphQL and also used Spring GraphQL together with Spring Data R2DBC to implement GraphQL request to query student information. To add, edit, or delete student information with GraphQL, we need to use type… Read More
Suppose I have a list of student information as follows:
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const students: Student[] = [ { id: "1", name: "Khanh" }, { id: "2", name: "Quan" }, ]; |
with the Student class with the following content:
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interface Student { id: string; name: string; } |
If I now define another class StudentInfo that also contains student information with more information about the class as follows:
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interface StudentInfo { id: string; studentName: string; className: string; } |
To convert the list… Read More
To convert a JSON data list string to a list of objects in TypeScript, you can use the parse() method of the JSON object. For example, I have a list of classes returned from the backend as a GraphQL response as follows:
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const response: any = `{ "data": { "clazzes": [ { "id": "1", "name": "A1" }, { "id": "2", "name": "A2" }, { "id": "3", "name": "B1" }, { "id": "4", "name": "B2" } ] } }`; |
On the… Read More
