Delete pattern from a variable with sed

问题

I am working with a script that has a variable called PRODUCT_VERSION. The version comes with a dot (for example 6.0). I need to remove the dot and save the result in another variable.

So far I come with this, but it does not work correctly

PRD_VER=$(sed "s/$PRODUCT_VERSION/\.//g")

回答1:

$ PRODUCT_VERSION=6.0

$ PRD_VER=${PRODUCT_VERSION/.}

$ echo $PRD_VER
60

Bash String Manipulation Examples

回答2:

This might work for you (GNU sed & bash):

NEW=$(sed 's/\.//g' <<<"$OLD")

or

NEW=$(echo "$OLD" | sed 's/\.//g')

However Mr Penny's answer is by far the best approach.

来源：https://stackoverflow.com/questions/16048316/delete-pattern-from-a-variable-with-sed