Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...
// see: https://github.com/chadoe/docker-cleanup-volumes
$ docker volume rm $(docker volume ls -qf dangling=true)
$ docker volume ls -qf dangling=true | xargs -r docker volume rm
Picking the right architecture = Picking the right battles + Managing trade-offs
- Clarify and agree on the scope of the system
- User cases (description of sequences of events that, taken together, lead to a system doing something useful)
- Who is going to use it?
- How are they going to use it?
(by @andrestaltz)
If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.
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#! /bin/bash | |
# Author: Shirish Padalkar (https://twitter.com/_Garbage_) | |
if [ "$#" -ne 1 ]; then | |
echo "Usage: $0 infoq_presentation_url" | |
exit 1 | |
fi | |
url_with_spaces=`curl -A "Mozilla/5.0 (iPad; U; CPU OS 3_2 like Mac OS X; en-us) AppleWebKit/531.21.10 (KHTML, like Gecko) Version/4.0.4 Mobile/7B334b Safari/531.21.10" $1 | grep "<source src=" | tr -dc "[:print:]"` |
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Latency Comparison Numbers (~2012) | |
---------------------------------- | |
L1 cache reference 0.5 ns | |
Branch mispredict 5 ns | |
L2 cache reference 7 ns 14x L1 cache | |
Mutex lock/unlock 25 ns | |
Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
Compress 1K bytes with Zippy 3,000 ns 3 us | |
Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |
As configured in my dotfiles.
start new:
tmux
start new with session name:
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import static org.junit.Assert.*; | |
import static org.hamcrest.CoreMatchers.is; | |
import static org.mockito.Mockito.*; | |
import static org.mockito.BDDMockito.*; | |
import org.hamcrest.BaseMatcher; | |
import org.hamcrest.Description; | |
import org.hamcrest.Matcher; |