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mongodb group values by multiple fields
...takes an "pipeline" expression as an argument instead of the "localFields" and "foreignFields" options. This then allows a "self-join" with another pipeline expression, in which we can apply $limit in order to return the "top-n" results.
db.books.aggregate([
{ "$group": {
"_id": "$addr",
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How to sort the result from string_agg()
...he question was about string_agg. Postgres was incidental to his question and he mentioned it last. The question is useful to others as well.
– nomen
Mar 5 at 17:42
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How to quit scala 2.11.0 REPL?
...y did this so you can distinguish between exiting the scala console in sbt and exiting sbt itself, though I could be wrong.
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Appending an element to the end of a list in Scala
...tried with myList ::= myElement but it seems it creates a strange object and accessing to myList.last always returns the first element that was put inside the list. How can I solve this problem?
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How to write one new line in Bitbucket markdown?
...ot seeing the special characters on your browser/platform: → is an arrow and should represent a blank space
– auco
Jun 25 '16 at 19:53
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Android get current Locale, not default
How do I get the user's current Locale in Android?
7 Answers
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Best way of invoking getter by reflection
...will always have a getter method. I know that I can use setAccesible(true) and get its value (when there is no PermissionManager), though I prefer to invoke its getter method.
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Using a remote repository with non-standard port
... for a remote repository. The remote repository is being served on a non-standard port (4019).
5 Answers
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How is Python's List Implemented?
Is it a linked list, an array? I searched around and only found people guessing. My C knowledge isn't good enough to look at the source code.
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JavaScript get element by name
...rror is because document.getElementsByName returns a NodeList of elements. And a NodeList of elements does not have a .value property.
Use this instead:
document.getElementsByName("acc")[0].value
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