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Random record from MongoDB
I am looking to get a random record from a huge (100 million record) mongodb .
26 Answers
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How do I do top 1 in Oracle?
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If you want just a first selected row, you can:
select fname from MyTbl where rownum = 1
You ...
PHP Function with Optional Parameters
I've written a PHP function that can accepts 10 parameters, but only 2 are required. Sometimes, I want to define the eighth parameter, but I don't want to type in empty strings for each of the parameters until I reach the eighth.
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The tilde operator in Python
...complement representation of the integer are reversed (as in b <- b XOR 1 for each individual bit), and the result interpreted again as a twos-complement integer. So for integers, ~x is equivalent to (-x) - 1.
The reified form of the ~ operator is provided as operator.invert. To support this o...
How do I use a custom Serializer with Jackson?
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Ruby: How to turn a hash into HTTP parameters?
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Get the name of the currently executing method
... name as a string, call __method__.to_s instead.
Note: This requires Ruby 1.8.7.
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How do you read CSS rule values with JavaScript?
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jQuery deferreds and promises - .then() vs .done()
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