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What do the different readystates in XMLHttpRequest mean, and how can I use them?
XMLHttpRequest has 5 readyState s, and I only use 1 of them (the last one, 4 ).
5 Answers
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Why is creating a Thread said to be expensive?
The Java tutorials say that creating a Thread is expensive. But why exactly is it expensive? What exactly is happening when a Java Thread is created that makes its creation expensive? I'm taking the statement as true, but I'm just interested in mechanics of Thread creation in JVM.
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When should I use double instead of decimal?
...cal) discussion of floating-point numbers/operations at machine level, try reading the oft-quoted article What Every Computer Scientist Should Know About Floating-Point Arithmetic.
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What exception classes are in the standard C++ library
...nction_call is thrown when you attempt to invoke std::function that is not ready (aka, default constructed or explicitly cleared via nullptr). future_error is used when you violate one of the many preconditions of the functions for the promise and future. And domain_error is (in theory) for cases ...
what is the difference between OLE DB and ODBC data sources?
I was reading a MS Excel help article about pivotcache and wonder what they mean by OLE DB and ODBC sources
11 Answers
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Cannot use ref or out parameter in lambda expressions
... It doesn't; question is why you can not reference an existing variable, already defined ref or out, inside a lambda. It is clear if you read the example code (try again to read it again). The accepted answer clearly explain why. Your answer is about using ref or out parameter to the lambda. Totally...
Difference between a Seq and a List in Scala
... LinkedList. In fact, Java has no equivalent to immutable collections (the read only thing only guarantees the new object cannot be changed, but you still can change the old one, and, therefore, the "read only" one).
Scala's List is highly optimized by compiler and libraries, and it's a fundamental...
With bash, how can I pipe standard error into another process?
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From reading the docs, that does both standard error and output as opposed to just stderr, but it's nice to know. Time to start looking at bash 4, I think.
– paxdiablo
Oct 2 '09 at 7:11
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Position an element relative to its container
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It is certainly defined in the specification. Read section 9.4.3 and check the initial values for the properties.
– Jim
Sep 19 '08 at 20:31
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Why do people say that Ruby is slow? [closed]
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@ZelphirKaltstahl I am late to this thread, but I would like to comment on your comment :) I agree interpreters and compilers play a major role on how a program performs, but the language is very important too. Dynamic languages like Ruby and Python are slower th...