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insert vs emplace vs operator[] in c++ map
I'm using maps for the first time and I realized that there are many ways to insert an element. You can use emplace() , operator[] or insert() , plus variants like using value_type or make_pair . While there is a lot of information about all of them and questions about particular cases, I sti...
What is the difference between String.Empty and “” (empty string)?
In .NET, what is the difference between String.Empty and "" , and are they interchangable, or is there some underlying reference or Localization issues around equality that String.Empty will ensure are not a problem?
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Find all records which have a count of an association greater than zero
I'm trying to do something that I thought it would be simple but it seems not to be.
10 Answers
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CSS '>' selector; what is it? [duplicate]
I've seen the "greater than" ( > ) used in CSS code a few times, but I can't work out what it does. What does it do?
7 A...
docker mounting volumes on host
I have successfully been able to share folders between a docker container with volumes using
5 Answers
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Count all occurrences of a string in lots of files with grep
I have a bunch of log files. I need to find out how many times a string occurs in all files.
15 Answers
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Safe integer parsing in Ruby
I have a string, say '123' , and I want to convert it to the integer 123 .
8 Answers
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Java 8 stream reverse order
General question: What's the proper way to reverse a stream? Assuming that we don't know what type of elements that stream consists of, what's the generic way to reverse any stream?
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Select multiple columns in data.table by their numeric indices
How can we select multiple columns using a vector of their numeric indices (position) in data.table ?
5 Answers
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What are the best practices for catching and re-throwing exceptions?
Should caught exceptions be re-thrown directly, or should they be wrapped around a new exception?
5 Answers
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