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Referencing another schema in Mongoose
...ake your query, you can populate references like this:
Post.findOne({_id: 123})
.populate('postedBy')
.exec(function(err, post) {
// do stuff with post
});
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Ruby combining an array into one string
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what if you were joining digits? [1,2,3] => 123?
– stevenspiel
Dec 9 '13 at 19:08
3
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Swift equivalent for MIN and MAX macros
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min and max are already defined in Swift:
func max<T : Comparable>(x: T, y: T, rest: T...) -> T
func min<T : Comparable>(x: T, y: T, rest: T...) -> T
See this great writeup on documented & undocumented built-in functions in Swift.
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.gitignore and “The following untracked working tree files would be overwritten by checkout”
... I thought it would only remove it from git.
– tyegah123
Sep 29 '14 at 8:37
25
The -x option hurt...
How can I pass a parameter to a setTimeout() callback?
...net Explorer is only supported in versions >=10, be carefull as in many sites ie8 and ie9 still gets some relevant share.
– le0diaz
Jun 3 '15 at 16:09
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How can I remove duplicate rows?
...cient than NOT EXISTS sqlinthewild.co.za/index.php/2010/03/23/… The same site also compares NOT IN vs NOT EXISTS. sqlinthewild.co.za/index.php/2010/02/18/not-exists-vs-not-in Out of the 3 I think NOT EXISTS performs best. All three will generate a plan with a self join though that can be avoided.
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filter for complete cases in data.frame using dplyr (case-wise deletion)
... passing it to the filter.
Another benchmark with more columns:
set.seed(123)
x <- sample(1e5,1e5*26, replace = TRUE)
x[sample(seq_along(x), 1e3)] <- NA
df <- as.data.frame(matrix(x, ncol = 26))
library(microbenchmark)
microbenchmark(
na.omit = {df %>% na.omit},
filter.anonymous = ...
Android - Launcher Icon Size
...This is all explained on the Iconography page of the Android Developers website:
http://developer.android.com/design/style/iconography.html
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This Handler class should be static or leaks might occur: IncomingHandler
...lass implements MessageHandler {
private static final int DO_IT_MSG = 123;
private MainThreadHandler<MyClass> mHandler = new MainThreadHandler<>(this);
private void start() {
// Do it in 5 seconds.
mHandler.sendEmptyMessageDelayed(DO_IT_MSG, 5 * 1000);
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Why does Google +1 record my mouse movements? [closed]
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123
+500
It app...