How do I replace the first string pattern in a variable using a bash shell script?

shoebill

Usage is ${name/pattern/string}

declare -A MyBucketList
MyBucketList=([1]="The rain in Spain stays mainly on the plain" [2]="Go to Mars" [3]="Climb Mount Everest")
echo ${MyBucketList[2]/Go/Just Been}

Running the script gives the following results. String Go has been replaced with Just Been.

$ ./associative_array.sh
Just Been to Mars

This usage applies to all string variables, not just arrays.