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log4j logging hierarchy order
...000;
public final static int ALL_INT = Integer.MIN_VALUE;
or the log4j API for the Level class, which makes it quite clear.
When the library decides whether to print a certain statement or not, it computes the effective level of the responsible Logger object (based on configuration) and compare...
Scala: write string to file in one statement
...recommended since the scala.tools.nsc.io package is not part of the public API but used by the compiler.
– Giovanni Botta
Feb 4 '14 at 20:48
3
...
What is the difference between Builder Design pattern and Factory Design pattern?
... is worth adding is: 1) Builder is mainly used to build POJOs using Fluent API (e.g. Person.builder().withName("Sam").withAge(38).build(). 2) In my experiene, builder is useful for POJO creation for domain objects, whereas factory is useful for creating a service objects like PdfGeneratorFactory cla...
Difference between Destroy and Delete
...troy runs any callbacks on the model while delete doesn't.
From the Rails API:
ActiveRecord::Persistence.delete
Deletes the record in the database and freezes this instance to reflect that no changes should be made (since they can't be persisted). Returns the frozen instance.
The row is ...
When and how should I use a ThreadLocal variable?
...en using them to avoid unwanted side-effects and memory leaks. Design your APIs so that the ThreadLocal values will always be automatically cleared when they are not needed anymore and that incorrect use of the API won't be possible (for example like this). ThreadLocals can be used to make the code ...
Add context path to Spring Boot application
...rked (Spring Boot 2.1.2), but did worked this: server.servlet.contextPath=/api
– lospejos
Feb 3 '19 at 20:31
2
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JdbcTemplate queryForInt/Long is deprecated in Spring 3.2.2. What should it be replaced by?
...n2002: Indeed your observation is true! However, from the viewpoint of the API design, if the query just return one NULL value, I believe it is better to return it as is, instead of asumming that (as queryForInt do) a NULL is equivalent to 0. It is the job of the API user to evaluate that kind of co...
How does HTTP file upload work?
... the file is (most likely) uploaded with a HTML form or using the FormData API. The file is only a part of the data sent in the request, hence the multipart/form-data Content-Type header.
If you want to send the file as the only content then you can directly add it as the request body and you set t...
How to Display blob (.pdf) in an AngularJS app
...urn {
downloadPdf: function () {
return $http.get('api/downloadPDF', { responseType: 'arraybuffer' }).then(function (response) {
return response;
});
}
};
});
Java REST Web Services - Spring MVC:
@RequestMapping(value = "/downloadPDF...
Type definition in object literal in TypeScript
...tal null/undefined access:
const state = {
instance: null as null | ApiService,
// OR
// instance: undefined as undefined | ApiService,
};
const useApi = () => {
// If I try to use it here, the type system requires a safe way to access it
// Simple lazy-initialization
...