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Does JSON syntax allow duplicate keys in an object?
...o according to the specification I would safely assume that means they are allowed.
That most implementations of JSON libraries do not accept duplicate keys does not conflict with the standard, because of the first quote.
Here are two examples related to the C++ standard library. When deserializin...
Is memcached a dinosaur in comparison to Redis? [closed]
...ould not care too much about performances. Redis is faster per core with small values, but memcached is able to use multiple cores with a single executable and TCP port without help from the client. Also memcached is faster with big values in the order of 100k. Redis recently improved a lot about bi...
Interview question: Check if one string is a rotation of other string [closed]
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@Jon Concentrate on s1+s1. Clearly, all of its substrings with size s1.length are rotations of s1, by construction. Therefore, any string of size s1.length that is a substring of s1+s1 must be a rotation of s1.
– Daniel C. Sobral
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NOT IN vs NOT EXISTS
...be the same at the moment but if either column is altered in the future to allow NULLs the NOT IN version will need to do more work (even if no NULLs are actually present in the data) and the semantics of NOT IN if NULLs are present are unlikely to be the ones you want anyway.
When neither Products...
Test a weekly cron job [closed]
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This really shouldn't have been upvoted and accepted, beyond running the script it does nothing to tell you whether the script will actually work when run from cron. Use the excellent crontest script in one of the other answers to t...
Bytecode features not available in the Java language
...case of the invokespecial bytecode is handled for this class. It is set by all modern Java compilers (where "modern" is >= Java 1.1, if I remember correctly) and only ancient Java compilers produced class files where this was un-set. This flag exists only for backwards-compatibility reasons. Note...
Parsing JSON with Unix tools
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There are a number of tools specifically designed for the purpose of manipulating JSON from the command line, and will be a lot easier and more reliable than doing it with Awk, such as jq:
curl -s 'https://api.github.com/users/lambda' | jq -r '.name'
You can...
CA2202, how to solve this case
Can anybody tell me how to remove all CA2202 warnings from the following code?
12 Answers
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Protected in Interfaces
Why are all methods in an interface definition implicitly public ? Why does it not allow a protected method?
13 Answer...
How to unzip a list of tuples into individual lists? [duplicate]
...l))
[(1, 3, 8), (2, 4, 9)]
The zip() function pairs up the elements from all inputs, starting with the first values, then the second, etc. By using *l you apply all tuples in l as separate arguments to the zip() function, so zip() pairs up 1 with 3 with 8 first, then 2 with 4 and 9. Those happen t...