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【shell script】シェルスクリプトで最も簡単に文字列をsplitする方法

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シェルスクリプトで文字列を,で区切って配列を作りたい!

"wine,beer,vodka,tequila,highball"
# ↓↓↓
("wine" "beer" "vodka" "tequila" "highball")

以外と調べても出てこない…

方法

カンマをスペースに置換する→スペースで区切り配列に格納する
IFS(区切り文字)を変更するより、元々の区切り文字であるスペースに置換した方が簡単です。

alcohol="wine,beer,vodka,tequila,highball"
alcohol=(${alcohol//,/ })

説明

カンマをスペースに置換する

"wine,beer,vodka,tequila,highball"
# ↓↓↓
"wine beer vodka tequila highball"

bashの機能を使う

alcohol="wine,beer,vodka,tequila,highball"
alcohol=${alcohol//,/ }

sedを使う方法もありますが、今回は紹介しません。

スペースで区切り配列に格納する

"wine beer vodka tequila highball"
# ↓↓↓
("wine beer vodka tequila highball")

()で括る

alcohol="wine beer vodka tequila highball"
alcohol=($alcohol)

参考文献

bashの変数内文字列置換まとめ
スペース区切りの文字列を配列に格納する方法

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