替换

1.    "abcd" -replace "a", "x"

xbcd

 

2.    "abcd" -replace "bc"

ad

 

3.    "aaabcde" -replace "^a*"

bcde

 

4.    "dfaq-adfdfsafd-asdfadf" -replace "-.*-","-xxx-"

dfaq-xxx-asdfadf