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Retrieving a List from a java.util.stream.Stream in Java 8
I was playing around with Java 8 lambdas to easily filter collections. But I did not find a concise way to retrieve the result as a new list within the same statement. Here is my most concise approach so far:
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What is the advantage of using abstract classes instead of traits?
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I can think of two differences
Abstract classes can have constructor parameters as well as type parameters. Traits can have only type parameters. There was some discussion that in future even traits can have constructor parameters
Abstract classes are fully interoperable with Java. You can...
How to use mongoimport to import csv
Trying to import a CSV with contact information:
21 Answers
21
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How to revert uncommitted changes including files and folders?
Is there a git command to revert all uncommitted changes in a working tree and index and to also remove newly created files and folders?
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Rails: FATAL - Peer authentication failed for user (PG::Error)
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If you installed postresql on your server then just host: localhost to database.yml, I usually throw it in around where it says pool: 5. Otherwise if it's not localhost definitely tell that app where to find its database.
development:
adapter: postgresql
encoding: unicode
database: ki...
SQLite UPSERT / UPDATE OR INSERT
I need to perform UPSERT / INSERT OR UPDATE against a SQLite Database.
7 Answers
7
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How to return PDF to browser in MVC?
...tion/pdf");
If you are generating this PDF dynamically, it may be better to use a MemoryStream, and create the document in memory instead of saving to file. The code would be something like:
Document document = new Document();
MemoryStream stream = new MemoryStream();
try
{
PdfWriter pdfWri...
Struct like objects in Java
Is it completely against the Java way to create struct like objects?
20 Answers
20
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When use getOne and findOne methods Spring Data JPA
...relies on EntityManager.find() that performs an entity eager loading.
T getOne(ID id) relies on EntityManager.getReference() that performs an entity lazy loading. So to ensure the effective loading of the entity, invoking a method on it is required.
findOne()/findById() is really more clear and si...
Android Endless List
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One solution is to implement an OnScrollListener and make changes (like adding items, etc.) to the ListAdapter at a convenient state in its onScroll method.
The following ListActivity shows a list of integers, starting with 40, adding items...