This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.
To capture the video (filesize: 19MB), using the free "QuickTime Player" application:
Sometimes you want to have a subdirectory on the master
branch be the root directory of a repository’s gh-pages
branch. This is useful for things like sites developed with Yeoman, or if you have a Jekyll site contained in the master
branch alongside the rest of your code.
For the sake of this example, let’s pretend the subfolder containing your site is named dist
.
Remove the dist
directory from the project’s .gitignore
file (it’s ignored by default by Yeoman).
package com.example; | |
import static java.util.Collections.*; | |
import java.util.Collection; | |
import java.util.HashMap; | |
import java.util.Map; | |
import java.util.Set; | |
import java.util.concurrent.TimeUnit; |
SSL 设计目标:
而翻墙的目标:
license: gpl-3.0 |
I'm writing this up from memory, so errors may appear.
This has been updated to use SHA256 certificates.
When connecting to a remote server via SSH it is often convenient to use SSH agent forwarding so that you don't need a separate keypair on that server for connecting to further servers.
This is enabled by adding the
ForwardAgent yes
option to any of your Host
entries in ~/.ssh/config
(or alternatively with the -A
option). Don't set this option in a wildcard Host *
section since any user on the remote server that can bypass file permissions can now als use keys loaded in your SSH agent. So only use this with hosts you trust.
Producer | |
Setup | |
bin/kafka-topics.sh --zookeeper esv4-hcl197.grid.linkedin.com:2181 --create --topic test-rep-one --partitions 6 --replication-factor 1 | |
bin/kafka-topics.sh --zookeeper esv4-hcl197.grid.linkedin.com:2181 --create --topic test --partitions 6 --replication-factor 3 | |
Single thread, no replication | |
bin/kafka-run-class.sh org.apache.kafka.clients.tools.ProducerPerformance test7 50000000 100 -1 acks=1 bootstrap.servers=esv4-hcl198.grid.linkedin.com:9092 buffer.memory=67108864 batch.size=8196 |
Below are the Big O performance of common functions of different Java Collections. | |
List | Add | Remove | Get | Contains | Next | Data Structure | |
---------------------|------|--------|------|----------|------|--------------- | |
ArrayList | O(1) | O(n) | O(1) | O(n) | O(1) | Array | |
LinkedList | O(1) | O(1) | O(n) | O(n) | O(1) | Linked List | |
CopyOnWriteArrayList | O(n) | O(n) | O(1) | O(n) | O(1) | Array | |
0.0.0.0 | |
1.1.80.147 | |
1.1.127.45 | |
1.33.190.70 | |
1.33.191.58 | |
1.209.208.200 | |
1.234.1.235 | |
1.234.2.155 | |
1.234.4.97 | |
1.234.17.34 |