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What is the Scala annotation to ensure a tail recursive function is optimized?
...on of the bytecode, to work out whether a method has been optimised.
Example:
you could add a @tailrec annotation so that you can be sure that your changes have worked.
import scala.annotation.tailrec
class Factorial2 {
def factorial(n: Int): Int = {
@tailrec def factorialAcc(acc: ...
Compare equality between two objects in NUnit
...o the guidelines here: msdn.microsoft.com/en-us/library/336aedhh(VS.80).aspx
– Michael Haren
Nov 25 '08 at 17:50
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How do I uninstall nodejs installed from pkg (Mac OS X)?
...here. Also, being a n00b to running .sh scripts myself, I had to $ chmod u+x uninstall-node.sh and then $ ./uninstall-node.sh before it worked for me. :)
– mhulse
Feb 19 '13 at 18:32
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How can I start an interactive console for Perl?
...ugger on a trivial program, like so:
perl -de1
Alternatively there's Alexis Sukrieh's Perl Console application, but I haven't used it.
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Pipe output and capture exit status in Bash
I want to execute a long running command in Bash, and both capture its exit status, and tee its output.
15 Answers
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Is it safe to parse a /proc/ file?
...code if you assume too much about the consistency of a file in /proc. For example, see this bug which came from assuming that /proc/mounts was a consistent snapshot.
For example:
/proc/uptime is totally atomic, as someone mentioned in another answer -- but only since Linux 2.6.30, which is less t...
Linux环境离线安装docker&docker-compose - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
Linux环境离线安装docker&docker-composelinux_docker_install一、docker离线安装1、下载docker离线安装包下载最新版本的 docker （或者选择自己想要安装的版本）到本地。1）docker下载地址：Docker版本下载 ||Docker-compose版本下载备注...
一、docker...
Running Python on Windows for Node.js dependencies
...e.
The error clearly says this:
gyp ERR! stack Error: Can't find Python executable "python", you can set the PYTHON env variable.
And in your comment, you say you did this:
set PYTHONPATH=%PYTHONPATH%;C:\My_python_lib
That's nice, but that doesn't set the PYTHON variable, it sets the PYTHONPA...
What is the LD_PRELOAD trick?
... across a reference to it recently on proggit and (as of now) it is not explained.
9 Answers
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Why should I use the keyword “final” on a method parameter in Java?
...riable, or argument/parameter variable, the effect is entirely the same.
Example
Let’s see the effect in action.
Consider this simple method, where the two variables (arg and x) can both be re-assigned different objects.
// Example use of this method:
// this.doSomething( "tiger" );
void do...