回答編集履歴
3
Update
test
CHANGED
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@@ -18,3 +18,18 @@
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18
18
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M11 M12 M13 M14
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19
19
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```
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20
20
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21
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+
**追記**
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22
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+
```bash
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23
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$ declare -a A=($(tail -n +2 source4.csv | cut -d, -f1))
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24
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$ echo "${A[@]}"
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25
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M11 M12 M13 M14
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26
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+
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27
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# GNU grep
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28
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$ grep --version
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29
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grep (GNU grep) 3.7
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30
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+
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31
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$ declare -a B=($(grep -Pzo -e '\n\s*\K(.+?)(?=\s*,)' source4.csv | tr '\0' '\n'))
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32
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$ echo "${B[@]}"
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33
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M11 M12 M13 M14
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34
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```
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35
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+
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2
Update
test
CHANGED
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@@ -4,15 +4,13 @@
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4
4
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#!/bin/bash
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5
5
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6
6
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function extract_first_item {
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7
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-
# skip header
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8
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-
[[ $1 == 0 ]] && return
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9
7
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local -a c
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10
8
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IFS=, read -r -a c <<< "$2"
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11
9
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A+=("${c[0]}")
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12
10
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}
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13
11
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14
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declare -a A
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15
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-
mapfile -t -c 1 -C extract_first_item < source4.csv
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13
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+
mapfile -t -c 1 -s 1 -C extract_first_item < source4.csv
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16
14
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15
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echo "${A[@]}"
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18
16
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1
Update
test
CHANGED
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@@ -6,9 +6,9 @@
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6
6
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function extract_first_item {
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7
7
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# skip header
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8
8
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[[ $1 == 0 ]] && return
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9
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-
local c
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9
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+
local -a c
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10
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-
IFS=, read -r c
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10
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IFS=, read -r -a c <<< "$2"
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11
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-
A+=("$c")
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11
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+
A+=("${c[0]}")
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12
12
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}
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13
13
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14
14
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declare -a A
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