1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
set -- "abc" "def ghi" "jkl"
A=("$@")
IFS=':'
echo 'IFS=: ${var-$*}'
unset var; printf '%s\n' ${var-$*}
printf '%s\n' ${var-${A[*]}}
echo "----"
echo 'IFS=: ${var=$*}'
unset var; printf '%s\n' ${var=$*}
printf 'var=%s\n' "$var"
unset var; printf '%s\n' ${var=${A[*]}}
printf 'var=%s\n' "$var"
echo "----"
echo 'IFS=: ${var+$*}'
printf '%s\n' ${var+$*}
printf '%s\n' ${var+${A[*]}}
echo "----"
echo 'IFS= ${var-$*}'
IFS=''
unset var; printf '%s\n' ${var-$*}
unset var; printf '%s\n' ${var-${A[*]}}
echo "----"
echo 'IFS= ${var=$*}'
unset var
printf '%s\n' ${var=$*}
printf 'var=%s\n' "$var"
unset var
printf '%s\n' ${var=${A[*]}}
printf 'var=%s\n' "$var"
echo "----"
echo 'IFS= ${var+$*}'
printf '%s\n' ${var+$*}
printf '%s\n' ${var+${A[*]}}
|
