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Automatically create an Enum based on values in a database lookup table?
...way of defining integer constants (even if System.Enum has some additional functionality). Instead of writing const int Red=0, Green=1, Blue=3; You write enum { Red, Green, Blue }. A constant is by definition constant and not dynamic.
– Olivier Jacot-Descombes
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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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.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...
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 = ...
What issues should be considered when overriding equals and hashCode in Java?
...flow when the implementation class doesn't override the equals method. not fun.
– Ran Biron
Dec 6 '10 at 19:16
2
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How can I measure the speed of code written in PHP? [closed]
...you want to benchmark a couple of instructions ; like compare two types of functions, for instance -- it's better if done thousands of times, to make sure any "perturbating element" is averaged.
Something like this, so, if you want to know how long it take to serialize an array :
$before = microti...
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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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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Why does Google +1 record my mouse movements? [closed]
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123
+500
It app...