I have a string in a file like this:
"Value1=[random number]"
After this string I want to add another string, specifically:
"Value2=100"
If I try to use:
sed '/Value1=/a Value2=100' myfile.txt
It will fail because I have not included the fact that Value1=[some random number].
How do I add the condition that Value1=random number and Value2 should be added to this string?
sed '/Value1=[0-9]\+/a Value2=100' myfile.txt
The [0-9]\+ will match any string of digits. For example, on my cygwin, GNU sed 4.2.2,
echo Value1=42 | sed '/Value1=[0-9]\+/a Value2=43'
produces
Value1=42
Value2=43
Edit: If the number may or may not be in double-quotes, use:
sed '/Value1="\?[0-9]\+"\?/a Value2=43'
The "\? is an optional double-quote.
Something like this:
$ sed 's,\(Value1=200\),\1 Value2=100,' myfile.txt
Result:
Value1=200 Value2=100
echo '"Value1=400"' | sed 's/"Value1=.*"/&\n"Value2=100"/'
Output:
"Value1=400" "Value2=100"
Or:
echo '"Value1=400"' | sed 's/"Value1=.*"/& "Value2=100"/'
Output:
"Value1=400" "Value2=100"
