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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",
"...
Is there a CSS selector by class prefix?
...hecks any other classes after the first if multiple classes are specified, and adds a bonus of checking the first class in case the attribute value is space-padded (which can happen with some applications that output class attributes dynamically).
Naturally, this also works in jQuery, as demonstra...
Mysql order by specific ID values
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You can use ORDER BY and FIELD function.
See http://lists.mysql.com/mysql/209784
SELECT * FROM table ORDER BY FIELD(ID,1,5,4,3)
It uses Field() function, Which "Returns the index (position) of str in the str1, str2, str3, ... list. Returns 0 i...
Unexpected character encountered while parsing value
...sing JsonConvert.DeserializeObject to deserialize response which is string and not json. Hence it was throwing the above error.
– Bijay Nandagiri
Sep 14 at 7:29
add a comment
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Resetting generator object in Python
...ls.tee) - this uses lazy load strategy, so items to list copied only on demand
– Dewfy
Aug 13 '09 at 13:23
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Changing the interval of SetInterval while it's running
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I assume that is what he meant. I just tried that and it seems to be working. Thanks, guys!
– Joe Di Stefano
Aug 14 '09 at 21:32
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How to present popover properly in iOS 8
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Okay, A housemate took a look at it and figured it out:
func addCategory() {
var popoverContent = self.storyboard?.instantiateViewControllerWithIdentifier("NewCategory") as UIViewController
var nav = UINavigationController(rootViewController: popover...
Why is Python 3.x's super() magic?
...as kicked off by Guido, who initially envisioned super becoming a keyword, and the idea of using a cell to look up the current class was also his. Certainly, the idea to make it a keyword was part of the first draft of the PEP.
However, it was in fact Guido himself who then stepped away from the ke...
Git on Windows: How do you set up a mergetool?
I've tried msysGit and Git on Cygwin. Both work just fine in and of themselves and both run gitk and git-gui perfectly.
19 ...
Side-by-side plots with ggplot2
...ut as an alternative to grid.arrange. See the answer by @claus-wilke below and this vignette for an equivalent approach; but the function allows finer controls on plot location and size, based on this vignette.
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