更新 'shell/shell变量提取赋值.md'
This commit is contained in:
parent
89d7859681
commit
7317fb3f38
1 changed files with 6 additions and 7 deletions
|
@ -1,5 +1,4 @@
|
||||||
|
|-|-|
|
||||||
|--|--|
|
|
||||||
|表达式|含义|
|
|表达式|含义|
|
||||||
|${var:-aa}|若var为空或未设定, 返回aa, var值不变|
|
|${var:-aa}|若var为空或未设定, 返回aa, var值不变|
|
||||||
|${var:=aa}|若var为空或未设定, 返回aa, var=aa|
|
|${var:=aa}|若var为空或未设定, 返回aa, var=aa|
|
||||||
|
|
Loading…
Add table
Add a link
Reference in a new issue