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IllegalArgumentException or NullPointerException for a null parameter? [closed]
...nally, I accept the argument given by other answers that parts of the Java API use NPE in this manner. However, the Java API is inconsistent with everything from exception types to naming conventions, so I think just blindly copying (your favorite part of) the Java API isn't a good enough argument ...
Wrapping synchronous code into asynchronous call
...else that is I/O-bound, then the best solution is to write an asynchronous API for it.
I'll proceed with the assumption that your "service" is a CPU-bound operation that must execute on the same machine as the web server.
If that's the case, then the next thing to evaluate is another assumption:
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Why doesn't Java Map extend Collection?
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From the Java Collections API Design FAQ:
Why doesn't Map extend Collection?
This was by design. We feel that
mappings are not collections and
collections are not mappings. Thus, it
makes little sense for Map to extend
the Collection ...
jQuery, simple polling example
...ing jQuery, and I'm trying to find a simple code example that will poll an API for a condition. (ie, request a webpage every few seconds and process the results)
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Get integer value of the current year in Java
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Using Java 8's time API (assuming you are happy to get the year in your system's default time zone), you could use the Year::now method:
int year = Year.now().getValue();
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Enabling HTTPS on express.js
...rypt v2 is ACME draft 11
version: 'draft-11'
, server: 'https://acme-v02.api.letsencrypt.org/directory'
// You MUST change these to valid email and domains
, email: 'john.doe@example.com'
, approveDomains: [ 'example.com', 'www.example.com' ]
, agreeTos: true
, configDir: "/path/to/project/acme...
Android 4.1: How to check notifications are disabled for the application?
...sEnabled(), from support library, to check if notifications are blocked on API 19+. The versions below API 19 will return true (notifications are enabled).
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Clearing localStorage in javascript?
...e log localstorage in the chrome devtools we see that it has the following APIs:
We can use the following API's for deleting items:
localStorage.clear(): Clears the whole localstorage
localStorage.removeItem('myItem'): To remove individual items
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Django Rest Framework: Dynamically return subset of fields
...ommended in the blogpost Best Practices for Designing a Pragmatic RESTful API , I would like to add a fields query parameter to a Django Rest Framework based API which enables the user to select only a subset of fields per resource.
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How to render a PDF file in Android
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Since API Level 21 (Lollipop) Android provides a PdfRenderer class:
// create a new renderer
PdfRenderer renderer = new PdfRenderer(getSeekableFileDescriptor());
// let us just render all pages
final int pageCount = renderer.g...