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Do I need to heartbeat to keep a TCP connection open?
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The connection should remain open regardless but yes it's often common to see protocols implement a heartbeat in order to help detect dead connections, IRC with the PING command for example.
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How can I find the length of a number?
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edited Jun 8 '12 at 16:34
answered Jun 8 '12 at 16:26
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How to get exit code when using Python subprocess communicate method?
How do I retrieve the exit code when using Python's subprocess module and the communicate() method?
5 Answers
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What is the reason why “synchronized” is not allowed in Java 8 interface methods?
In Java 8, I can easily write:
2 Answers
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What is the difference between statically typed and dynamically typed languages?
...r a lot that new programming languages are dynamically typed but what does it actually mean when we say a language is dynamically typed vs. statically typed?
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How do I pronounce “=>” as used in lambda expressions in .Net
...or which". For example,
Func f = x => x * 2;
Func test = c => c.City == "London";
reads as "x becomes x * 2" and "c for which c.City equals London"
As far as 'goes to' - that's never made sense to me. 'p' isn't going anywhere.
In the case of reading code to someone, say, over the phon...
How do you cast a List of supertypes to a List of subtypes?
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Simply casting to List<TestB> almost works; but it doesn't work because you can't cast a generic type of one parameter to another. However, you can cast through an intermediate wildcard type and it will be allowed (since you can cast to and from wildcard types, just with a...
How to import a class from default package
I am using Eclipse 3.5 and I have created a project with some package structure along with the default package. I have one class in default package - Calculations.java and I want to make the use of that class in any of the package (for instance in com.company.calc ). When I try to make the use of...
Pointers vs. values in parameters and return values
... channels, strings, function values, and interface values are implemented with pointers internally, and a pointer to them is often redundant.
Elsewhere, use pointers for big structs or structs you'll have to change, and otherwise pass values, because getting things changed by surprise via a pointer ...
Fluent Validation vs. Data Annotations [closed]
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I prefer Fluent Validation:
It gives me far better control of my validation rules
Doing conditional validation on different properties is so much easier compared to Data Annotations
It separates the validation from my view models
Unit testing is far eas...