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What are the differences between a HashMap and a Hashtable in Java?
...ces), or using a ConcurrentMap implementation (and exploiting its extended API for concurrency). Bottom line: the only reason to use Hashtable is when a legacy API (from ca. 1996) requires it.
– erickson
Mar 16 '12 at 17:19
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What is the benefit of using Fragments in Android, rather than Views?
...n developing for Android , you can set your target (or minimum) sdk to 4 (API 1.6) and add the android compatibility package (v4) to add support for Fragments . Yesterday I did this and successfully implemented Fragments to visualize data from a custom class.
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How Should I Declare Foreign Key Relationships Using Code First Entity Framework (4.1) in MVC3?
... PK name you must either use ForeignKeyAttribute data annotation or fluent API to map the relation
Data annotation:
// The name of related navigation property
[ForeignKey("Parent")]
public int ParentId { get; set; }
Fluent API:
modelBuilder.Entity<Child>()
.HasRequired(c =>...
How to Iterate over a Set/HashSet without an Iterator?
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Call requires API 24
– djdance
Jan 24 at 9:38
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Is there any way to kill a Thread?
...peError("Only types can be raised (not instances)")
res = ctypes.pythonapi.PyThreadState_SetAsyncExc(ctypes.c_long(tid),
ctypes.py_object(exctype))
if res == 0:
raise ValueError("invalid thread id")
elif res != 1:
# "if...
jQuery find events handlers registered with an object
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As of jQuery 1.8, the event data is no longer available from the "public API" for data. Read this jQuery blog post. You should now use this instead:
jQuery._data( elem, "events" );
elem should be an HTML Element, not a jQuery object, or selector.
Please note, that this is an internal, 'priva...
What is the difference between “Class.forName()” and “Class.forName().newInstance()”?
...il runtime, making your code more dynamic.
A typical example is the JDBC API which loads, at runtime, the exact driver required to perform the work. EJBs containers, Servlet containers are other good examples: they use dynamic runtime loading to load and create components they don't know anything ...
Obtain form input fields using jQuery?
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According to the jQuery API docs, .serialize() (api.jquery.com/serialize) puts all of the form's elements in a single string ready for appending to a URL in a query string, essentially mimicking a GET form request. This would not accomplish what nic...
How do I programmatically shut down an instance of ExpressJS for testing?
...en call process.exit(0).
Links:
app.close: http://nodejs.org/docs/latest/api/http.html#server.close (same applies for)
process.exit:
http://nodejs.org/docs/latest/api/process.html#process.exit
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How to wait until an element exists?
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I've always found MutationObserver api a bit complex so I've built a library, arrive.js, to provide a simpler api to listen for elements creation/removal.
– Uzair Farooq
Apr 17 '14 at 18:23
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