87 lines
887 B
Text
87 lines
887 B
Text
# basic cases
|
|
a=1
|
|
a+=4
|
|
echo $a
|
|
|
|
x=(1 2 3)
|
|
x+=(4 5 6)
|
|
|
|
echo ${x[@]}
|
|
|
|
x[4]+=1
|
|
echo ${x[@]}
|
|
|
|
# trickier cases
|
|
# post-bash-4.2: bash understands += in environment assignments preceding
|
|
# command names
|
|
a+=5 printenv a
|
|
echo $a
|
|
|
|
# if the integer flag is set, ksh93 appears to do arithmetic += and evaluate
|
|
# old value as an arithmetic expression
|
|
a=
|
|
typeset -i a
|
|
a+=7
|
|
echo $a
|
|
|
|
b=4+1
|
|
typeset -i b
|
|
b+=37
|
|
|
|
echo $b
|
|
|
|
unset x
|
|
x=(1 2 3 4 5)
|
|
|
|
typeset -i x
|
|
|
|
x[4]+=7
|
|
|
|
echo ${x[@]}
|
|
|
|
unset x
|
|
typeset -i x
|
|
|
|
x=([0]=7+11)
|
|
echo ${x[@]}
|
|
|
|
unset x
|
|
x=(1 2 3 4 5)
|
|
|
|
typeset -i x
|
|
|
|
#x[4]=7+11
|
|
|
|
x=(1 2 3 4 [4]=7+11 )
|
|
echo ${x[@]}
|
|
|
|
x=( 1 2 [2]+=7 4 5 )
|
|
echo ${x[@]}
|
|
|
|
x+=( [3]+=9 [5]=9 )
|
|
echo ${x[@]}
|
|
|
|
unset a
|
|
a=1
|
|
export a+=4
|
|
printenv a
|
|
printenv a+
|
|
|
|
unset x
|
|
typeset -i x=4+5
|
|
echo $x
|
|
|
|
unset x
|
|
typeset x+=4
|
|
echo $x
|
|
|
|
typeset -i x+=5
|
|
echo $x
|
|
|
|
readonly x+=7
|
|
echo $x
|
|
|
|
x+=5
|
|
|
|
${THIS_SH} ./appendop1.sub
|
|
${THIS_SH} ./appendop2.sub
|