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.toArray(new MyClass[0]) or .toArray(new MyClass[myList.size()])?
...rray(new MyClass[0]);
I have run a micro benchmark using jmh the results and code are below, showing that the version with an empty array consistently outperforms the version with a presized array. Note that if you can reuse an existing array of the correct size, the result may be different.
Benc...
What is the difference between and ?
What is the difference between <html lang="en"> and <html lang="en-US"> ? What other values can follow the dash?
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What are attributes in .NET?
What are attributes in .NET, what are they good for, and how do I create my own attributes?
11 Answers
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How to delete duplicate lines in a file without sorting it in Unix?
...ay then seen[$0] will evaluate to false. The ! is the logical NOT operator and will invert the false to true. Awk will print the lines where the expression evaluates to true. The ++ increments seen so that seen[$0] == 1 after the first time a line is found and then seen[$0] == 2, and so on.
Awk eval...
Split value from one field to two
I've got a table field membername which contains both the last name and the first name of users. Is it possible to split those into 2 fields memberfirst , memberlast ?
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How do I make Git use the editor of my choice for commits?
... variable: export GIT_EDITOR=vim
If you want to set the editor for Git and also other programs, set the standardized VISUAL and EDITOR environment variables*:
export VISUAL=vim
export EDITOR="$VISUAL"
* Setting both is not necessarily needed, but some programs may not use the more-correct VIS...
How to use underscore.js as a template engine?
...'m trying to learn about new usages of javascript as a serverside language and as a functional language. Few days ago I heard about node.js and express framework. Then I saw about underscore.js as a set of utility functions. I saw this question on stackoverflow
. It says we can use underscore.js a...
Reverting a single file to a previous version in git [duplicate]
... to go through different commits on a file.
Say I modified a file 5 times and I want to go back to change 2, after I already committed and pushed to a repository.
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Best Practice: Initialize JUnit class fields in setUp() or at declaration?
...ayList, with cases like testIndexOutOfBoundException, testEmptyCollection, and the like. The perspective there is of someone writing a class and making sure it works right.
You should probably do the same when testing your own classes: create your object in setUp or in a test method, so that you'll...
Why can't radio buttons be “readonly”?
... Disabled doesn't work, because it doesn't submit the value (or does it?), and it grays out the radio button. Read-only is really what I'm looking for, but for some mysterious reason it doesn't work.
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