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Why can lambdas be better optimized by the compiler than plain functions?
... whose definition is visible, and using gcc v5.3, std::find_if(b, e, pred) does not inline pred, but std::find_if(b, e, [](int x){return pred(x);}) does. Clang manages to inline both, but doesn't produce code as fast as g++ with the lambda.
– rici
Feb 1 '16 at ...
How to achieve function overloading in C?
... No. printf is not function overloading. it uses vararg !!! And C doesn't support Function Overloading.
– hqt
Jul 29 '12 at 9:49
53
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What is the expected syntax for checking exception messages in MiniTest's assert_raises/must_raise?
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Minitest does not provide (yet) you a way to check the actual exception message. But you could add a helper method that does it and extend ActiveSupport::TestCase class to use everywhere in your rails test suite, e.g.:
in test_helper....
How to redirect output of an entire shell script within the script itself?
...nswer is of the "I/O only" variant — it only changes the redirection and does not replace the script that's running. (The set command is similarly multi-purpose.)
– Jonathan Leffler
Nov 15 '16 at 14:05
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ActiveMQ or RabbitMQ or ZeroMQ or [closed]
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The question doesn't mention requiring AMQP, but this answer is focused on AMQP. If we were to assume JMS as a requirement then the answer would basically be the reverse: ActiveMQ is most popular, RabbitMQ has some support that should pro...
Limiting the number of records from mysqldump?
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What does the "1" before limit do?
– Phob
Jul 14 '11 at 23:29
31
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When should I use a NoSQL database instead of a relational database? Is it okay to use both on the s
...ver? Do complex analyses have to be performed from existing data (OLAP) or does the application have to be able to process many transactions (OLTP)? What is the data structure? That is far from the end of question time.
In my view, it is wrong to make technology decisions on the basis of bold buzzw...
Is there a date format to display the day of the week in java?
... be around, let alone java would finally get around to bailing on Date. It does technically answer the OPs question. However, I can probably add a new section on how the new java.time stuff works
– Nathan Feger
Jun 20 '19 at 21:28
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Factors in R: more than an annoyance?
...fferent: see this email or ?"[.data.frame". Using drop=TRUE on data.frames does not work as you'd imagine:
x <- subset(iris, Species == 'setosa', drop=TRUE) # susbetting with [ behaves the same way
x$Species
# [1] setosa setosa setosa setosa setosa setosa setosa setosa setosa setosa
# [11] set...
Visual Studio, debug one of multiple threads
...between them. Switching to a thread is fine, but as soon as another thread does something, then debugger jumps to it. If I can't freeze the other thread because it needs to do stuff, then how do I stay locked to just the thread I'm concerned with?
– bubbleking
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