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2017-04-01 シェル芸 LT
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2017-04-01 シェル芸 LT
1.
シェル芸 渡邉 浩平 2017年4月1日(土) Maker Faire
Tokyo 2016
2.
去年のニュース ほぼ全てのパソコン向けOSでbashが動く https://blogs.msdn.microsoft.com/commandline/learn-about-bash-on-windows-subsystem-for-linux/
3.
シェルスクリプトの魅力 ✓豊富なコマンド ✓シンプルなデータ構造 ✓並列処理
4.
【魅力1】 豊富なコマンド # Ubuntu
14.04 apt search | grep ^[0-9a-zA-Z] | wc -l 48184 コマンド=あらゆる言語の実行可能なファイル Etc..
5.
【魅力2】 シンプルなデータ構造 パイプ「|」で標準入出力を自在に操る プログラマーの君! 騙されるな!
シェルスクリプトはそう書いちゃ駄目だ!! という話 – Qiita http://qiita.com/piroor/items/77233173707a0baa6360
6.
【魅力3】 並列処理 seq 3
| xargs -P0 -I{} sleep {} プロセス単位で非同期に実行可能 1s 2s 3s 6s 3s-P0 W/O -P0
7.
100未満の素数を列挙せよ #!/usr/bin/env ruby def primes(max) l
= [*2..max] pl = [] while val = l.shift pl << val l.delete_if {|num| num % val == 0} end return pl end p primes(99)
8.
100未満の素数を列挙せよ :()(read i&&(echo $i;awk
¥$1%$i|:));seq 2 99|: git.io/vSZiR
9.
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