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Difference between HashSet and HashMap?
... does not allow duplicate values, what is the difference between HashMap and HashSet ?
19 Answers
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Group query results by month and year in postgresql
...m("Sales") as "Sales" : The SUM() function adds up all the "Sales" values, and supplies a case-sensitive alias, with the case sensitivity maintained by using double-quotes.
group by 1,2 : The GROUP BY function must contain all columns from the SELECT list that are not part of the aggregate (aka, al...
Can promises have multiple arguments to onFulfilled?
I'm following the spec here and I'm not sure whether it allows onFulfilled to be called with multiple arguments. For example:
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i18n Pluralization
... }
}
}
}
}
Native speakers may enjoy cases such as 111 and 121.
And here the test results:
zero: 0 запросов/куриц/яблок
one: 1 запрос/курица/яблоко
few: 3 запроса/курицы/яблока
many: 5 запросов/куриц/яблок...
What's the pythonic way to use getters and setters?
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What's the pythonic way to use getters and setters?
The "Pythonic" way is not to use "getters" and "setters", but to use plain attributes, like the question demonstrates, and del for deleting (but the names are changed to protect the innocent... builtins):
valu...
Is there a way to 'uniq' by column?
...eed the ,1 in -k1,1? why not just -k1?
– hello_there_andy
Nov 24 '14 at 20:10
19
@hello_there_and...
How do I use JDK 7 on Mac OSX?
...Apple's Java 1.6, I had to run /Library/Java/JavaVirtualMachines/1.7.0.jdk and drag "Java SE 7" to the top of the list on the "General" tab. This will also make javac point to the Java 1.7 version when running the terminal.
– sschuberth
Jun 1 '12 at 8:19
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Jquery mouseenter() vs mouseover()
...ter reading a recently answered question i am unclear if i really understand the difference between the mouseenter() and mouseover() . The post states
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Is there a way of having git show lines added, lines changed and lines removed?
"git diff --stat" and "git log --stat" show output like:
5 Answers
5
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When to use Common Table Expression (CTE)
I have begun reading about Common Table Expression and cannot think of a use case where I would need to use them. They would seem to be redundant as the same can be done with derived tables. Is there something I am missing or not understanding well? Can someone give me a simple example of limitati...