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Must Dependency Injection come at the expense of Encapsulation?
...using an OO language as the 'host', but the ideas behind IoC come from component-oriented software engineering, not OO.
Component software is all about managing dependencies - an example in common use is .NET's Assembly mechanism. Each assembly publishes the list of assemblies that it references, a...
How can I initialize a String array with length 0 in Java?
...said,
new String[0]
will indeed create an empty array. However, there's one nice thing about arrays - their size can't change, so you can always use the same empty array reference. So in your code, you can use:
private static final String[] EMPTY_ARRAY = new String[0];
and then just return EMP...
Focus Input Box On Load
...h because Opera is inconsistent about
// whether a carriage return is one character or two.
var len = this.value.length * 2;
this.setSelectionRange(len, len);
} else {
// This might work for browsers without setSelectionRange support.
this.value = this.value;
}
if (this.n...
Referring to the null object in Python
...
In Python, the 'null' object is the singleton None.
The best way to check things for "Noneness" is to use the identity operator, is:
if foo is None:
...
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Android Fragments. Retaining an AsyncTask during screen rotation or configuration change
I'm working on a Smartphone / Tablet app, using only one APK, and loading resources as is needed depending on screen size, the best design choice seemed to be using Fragments via the ACL.
...
How can I drop all the tables in a PostgreSQL database?
...he scope of deletion to only the database you managed and not the system's ones
– Guillaume Gendre
Oct 29 '12 at 16:36
8
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What is the use of hashCode in Java?
... bucket.. then it uses the equals() to evaluate", so what if there is only one hash code matched element found, it returns true directly? but since multiple objects can have the same hash code so it has to run equals() to evaluate if the matched element is equal, else it may give you the unexpected ...
Export specific rows from a PostgreSQL table as INSERT SQL script
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Alright, so far your solution works. One thing missed is I need to add "-U user_name". I also almost succeed with ToraSQL tool, it's just that it has error in date-time data in the script result. If none can give GUI tool solution in 2 days, your answer will be ...
When to use inline function and when not to use it?
...y inlined. The degree of cleverness of a compiler cannot be legislated, so one compiler might generate 720, another 6 * fac(5), and yet another an un-inlined call fac(6).
To make inlining possible in the absence of unusually clever compilation and linking facilities, the definition–and not j...
What's the difference between an exclusive lock and a shared lock?
... them to finish reading before she clears the board to write more => If one or more shared locks already exist, exclusive locks cannot be obtained.
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