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Factory pattern in C#: How to ensure an object instance can only be created by a factory class?
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Ah, you could also throw an exception instead of returning null.
– Ricardo Nolde
Nov 30 '10 at 15:03
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Automatically capture output of last command into a variable using Bash?
I'd like to be able to use the result of the last executed command in a subsequent command. For example,
22 Answers
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What is a JavaBean exactly?
...ically do things with class instances you define in a predefined way. For example, if a library wants to stream any object you pass into it, it knows it can because your object is serializable (assuming the lib requires your objects be proper JavaBeans).
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Declaration/definition of variables locations in ObjectiveC?
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I can understand your confusion. Especially since recent updates to Xcode and the new LLVM compiler changed the way ivars and properties can be declared.
Before "modern" Objective-C (in "old" Obj-C 2.0) you didn't have a lot of choices. Instance variables used to be declared in the header be...
How can I see the request headers made by curl when sending a request to the server?
...k curl -v is the easiest. It will spit out the request headers (lines prefixed with '>') without having to write to a file:
$ curl -v -I -H "Testing: Test header so you see this works" http://stackoverflow.com/
* About to connect() to stackoverflow.com port 80 (#0)
* Trying 69.59.196.211... co...
Python pandas Filtering out nan from a data selection of a column of strings
...l Graham NaN
4 lob NaN NaN
5 lob NaN NaN
[5 rows x 3 columns]
In [89]:
nms = nms.dropna(thresh=2)
In [90]:
nms[nms.name.notnull()]
Out[90]:
movie name rating
0 thg John 3
3 mol Graham NaN
[2 rows x 3 columns]
EDIT
Actually looking at what you o...
How is std::function implemented?
According to the sources I have found, a lambda expression is essentially implemented by the compiler creating a class with overloaded function call operator and the referenced variables as members. This suggests that the size of lambda expressions varies, and given enough references variables tha...
Dependency injection with Jersey 2.0
Starting from scratch without any previous Jersey 1.x knowledge, I'm having a hard time understanding how to setup dependency injection in my Jersey 2.0 project.
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How do I use the lines of a file as arguments of a command?
Say, I have a file foo.txt specifying N arguments
10 Answers
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What does the “|” (single pipe) do in JavaScript?
...nce bitwise operations only make sense on integers, 0.5 is truncated.
0 | x is x, for any x.
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