Christian Hick

Asked: 2020-08-17 21:58:42 +0800 CST2020-08-17 21:58:42 +0800 CST 2020-08-17 21:58:42 +0800 CST

如何有效地将 bash 变量拆分为两个变量

我有一个变量 $b，我想将它分成两个变量 $startt 和 $finisht。

#!/bin/bash

b='08:10:00','11:12:00'

b=$(echo "$b" | tr -d "'")

IFS=',' read -r _ startt finisht _ <<<"$b"

echo "$startt"
echo "$finisht"

以下是所需的输出。开始 = 08:10:00 和结束 = 11:12:00。但是，当我运行此脚本时，我只得到 11:12:00。我想尽可能有效地拆分变量。任何人都可以帮忙吗？

Best Answer

xenoid

startt=${b%,*}  # cut off the comma and everything that follows
finisht=${b#*,} # cut off the comma and everything that precedes

>>>b='08:10:00','11:12:00'
>>>echo $b
08:10:00,11:12:00
>>>startt=${b%,*}
>>>finisht=${b#*,}
>>>echo $startt
08:10:00
>>>echo $finisht
11:12:00

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