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How do you create a read-only user in PostgreSQL?
I'd like to create a user in PostgreSQL that can only do SELECTs from a particular database. In MySQL the command would be:
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Inverse dictionary lookup in Python
Is there any straightforward way of finding a key by knowing the value within a dictionary?
13 Answers
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Python `if x is not None` or `if not x is None`?
... (I'm assuming not), and is there any case where one really doesn't fit (making the other a clear winner for my convention)?*
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What is a Memory Heap?
... don't store a pointer to it anymore), you have what is called a memory leak. This is where the memory has still been allocated, but you have no easy way of accessing it anymore. Leaked memory cannot be reclaimed for future memory allocations, but when the program ends the memory will be free'd up...
How can I escape a double quote inside double quotes?
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Use a backslash:
echo "\"" # Prints one " character.
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Remove characters from NSString?
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Mundi
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answered May 29 '09 at 12:45
Tom JefferysTo...
How do I abort the execution of a Python script? [duplicate]
...it() is the normal way to end a child process created with a call to os.fork(), so it does have a use in certain circumstances.
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Maven project version inheritance - do I have to specify the parent version?
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Notice that there are some cases when this behaviour is actually pretty OK and gives more flexibility you may need. Sometimes you want to use some of previous parent's version to inherit, however that's not a mainstream case.
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Why does C++ rand() seem to generate only numbers of the same order of magnitude?
...31 times more numbers between 2^25 and 2^30 than between 1 and 2^25 :) thanks for the quick answer. I need to rethink the program then. Question answered.
– Tallaron Mathias
Jun 20 '13 at 9:35
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How to elegantly rename all keys in a hash in Ruby? [duplicate]
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ages = { 'Bruce' => 32, 'Clark' => 28 }
mappings = { 'Bruce' => 'Bruce Wayne', 'Clark' => 'Clark Kent' }
ages.transform_keys(&mappings.method(:[]))
#=> { 'Bruce Wayne' => 32, 'Clark Kent' => 28 }
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