AldoMX

Installing Windows 10 to an external drive without a Windows host

The long story

We were talking at the office about having a LAN Party and playing some old school games like Age of Empires and Starcraft. The issue is that I have Linux installed. I didn't want to ruin everyone else's fun by having random crashes, out-of-sync errors and similar stuff using Wine, and I didn't want to do the dual boot dance, so I figured out that the best option was to install Windows to an external drive.

bittner

# Set inotify watch limit high enough for IntelliJ IDEA (PhpStorm, PyCharm, RubyMine, WebStorm).
# Create this file as /etc/sysctl.d/60-jetbrains.conf (Debian, Ubuntu), and
# run `sudo service procps start` or reboot.
# Source: https://confluence.jetbrains.com/display/IDEADEV/Inotify+Watches+Limit
# 
# More information resources:
# -$ man inotify  # manpage
# -$ man sysctl.conf  # manpage
# -$ cat /proc/sys/fs/inotify/max_user_watches  # print current value in use

nikic

Why objects (usually) use less memory than arrays in PHP

This is just a small post in response to [this tweet][tweet] by Julien Pauli (who by the way is the release manager for PHP 5.5). In the tweet he claims that objects use more memory than arrays in PHP. Even though it can be like that, it's not true in most cases. (Note: This only applies to PHP 5.4 or newer.)

The reason why it's easy to assume that objects are larger than arrays is because objects can be seen as an array of properties and a bit of additional information (like the class it belongs to). And as array + additional info > array it obviously follows that objects are larger. The thing is that in most cases PHP can optimize the array part of it away. So how does that work?

The key here is that objects usually have a predefined set of keys, whereas arrays don't: