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Java 8: performance of Streams vs Collections
... the middle of the list using iterator.
Stop writing benchmarking code by hand, use JMH.
Proper benchmarks:
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@BenchmarkMode(Mode.AverageTime)
@OperationsPerInvocation(StreamVsVanilla.N)
public class StreamVsVanilla {
public static final int N = 10000;
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Can constructors be async?
...onstructor acts very similarly to a method returning the constructed type. And async method can't return just any type, it has to be either “fire and forget” void, or Task.
If the constructor of type T actually returned Task<T>, that would be very confusing, I think.
If the async constru...
How to convert int[] to Integer[] in Java?
I'm new to Java and very confused.
13 Answers
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“Insufficient Storage Available” even there is lot of free space in device memory
The total space of my app is 10 MB, and after installation it will take less than 20 MB. In Galaxy Note I , while updating my app, it's saying "Insufficient Storage Available", where there is 214 MB of free space in device memory (internal). It happens even trying to download a new app.
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Remove a HTML tag but keep the innerHtml
...I was sitting there writing out a near identical answer regarding unwrap() and couldn't remember how to get the text part, forgot about .contents() - excellent.
– Orbling
Nov 20 '10 at 13:38
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Guava: Why is there no Lists.filter() function?
...such as #get(index) on the returned List view (inviting performance bugs). And ListIterator would be a pain to implement as well (though I submitted a patch years ago to cover that).
Since indexed methods can't be efficient in the filtered List view, it's better to just go with a filtered Iterable,...
AngularJS does not send hidden field value
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Great. And also you can use ng-value="modelName" to do it without brackets.
– Jonathan
Mar 12 '14 at 21:00
2
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Java: Get last element after split
I am using the String split method and I want to have the last element.
The size of the Array can change.
12 Answers
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Is there a way to get a collection of all the Models in your Rails app?
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EDIT: Look at the comments and other answers. There are smarter answers than this one! Or try to improve this one as community wiki.
Models do not register themselves to a master object, so no, Rails does not have the list of models.
But you could st...
How to display pandas DataFrame of floats using a format string for columns?
I would like to display a pandas dataframe with a given format using print() and the IPython display() . For example:
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