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PHP Fatal error: Cannot redeclare class
Does anyone know what can cause this problem?
18 Answers
18
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How to serialize an Object into a list of URL query parameters?
...!= "") {
str += "&";
}
str += key + "=" + encodeURIComponent(obj[key]);
}
Example: http://jsfiddle.net/WFPen/
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Is there a difference between foreach and map?
... some operation with side effects to each list member (such as saving each one to the database for example)
map iterates over a list, transforms each member of that list, and returns another list of the same size with the transformed members (such as converting a list of strings to uppercase)
...
Argument list too long error for rm, cp, mv commands
...certain it will delete what you expect:
for f in *.pdf; do echo rm "$f"; done
And execute it:
for f in *.pdf; do rm "$f"; done
Also this is a portable approach as glob have strong and consistant behavior among shells (part of POSIX spec).
Note: As noted by several comments, this is indeed sl...
How to jump to a particular line in a huge text file?
...
linecache:
The linecache module allows one to get any line from a Python source file, while attempting to optimize internally, using a cache, the common case where many lines are read from a single file. This is used by the traceback module to retrieve source line...
Does Java have a HashMap with reverse lookup?
...ch class in the Java API. The Apache Commons class you want is going to be one of the implementations of BidiMap.
As a mathematician, I would call this kind of structure a bijection.
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JUnit test with dynamic number of tests
... testEveryFileInDirectory method in the TestCase this shows up as only one test that may fail or succeed. But I am interested in the results on each individual file. How can I write a TestCase / TestSuite such that each file shows up as a separate test e.g. in the graphical TestRunner of Ecl...
Can enums be subclassed to add new elements?
... with numbers, with no automatic validation or anything. IMO enums are the one bit of Java which is actually better than C#.
– Jon Skeet
Nov 13 '10 at 13:21
21
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Design Patterns: Factory vs Factory method vs Abstract Factory
...uit: Apple and Orange.
Factory
Factory is "fixed", in that you have just one implementation with no subclassing. In this case, you will have a class like this:
class FruitFactory {
public Apple makeApple() {
// Code for creating an Apple here.
}
public Orange makeOrange() {
// Cod...
What are the differences between “=” and “
...vel (e.g.,
in the complete expression typed at the command prompt) or as one
of the subexpressions in a braced list of expressions.
Let’s not put too fine a point on it: the R documentation is (subtly) wrong [1]. This is easy to show: we just need to find a counter-example of the = operator ...