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Choosing between std::map and std::unordered_map [duplicate]
Now that std has a real hash map in unordered_map , why (or when) would I still want to use the good old map over unordered_map on systems where it actually exists? Are there any obvious situations that I cannot immediately see?
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Calculate difference in keys contained in two Python dictionaries
Suppose I have two Python dictionaries - dictA and dictB . I need to find out if there are any keys which are present in dictB but not in dictA . What is the fastest way to go about it?
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Best way to check if object exists in Entity Framework?
What is the best way to check if an object exists in the database from a performance point of view? I'm using Entity Framework 1.0 (ASP.NET 3.5 SP1).
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How do I get the current date in JavaScript?
How do I get current date in JavaScript?
56 Answers
56
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Getting pids from ps -ef |grep keyword
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Determine if 2 lists have the same elements, regardless of order? [duplicate]
Sorry for the simple question, but I'm having a hard time finding the answer.
4 Answers
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querySelector and querySelectorAll vs getElementsByClassName and getElementById in JavaScript
I would like to know what exactly is the difference between querySelector and querySelectorAll against getElementsByClassName and getElementById ?
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How do you get a string to a character array in JavaScript?
How do you convert a string to a character array in JavaScript?
13 Answers
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Pipe output and capture exit status in Bash
I want to execute a long running command in Bash, and both capture its exit status, and tee its output.
15 Answers
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How do I get the first element from an IEnumerable in .net?
I often want to grab the first element of an IEnumerable<T> in .net, and I haven't found a nice way to do it. The best I've come up with is:
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