bash string splitting into array

[praveenhm]

I am using gnu bash 3.2
I need to split the string into array like

a=this_is_whole_world.file # split [_.]

I need to split this on _ and . some thing like this
a[0]=this
a[1]=is
a[2]=whole
a[3]=world
a[4]=file

preferable using bash regex. if not sed is also ok.

Thanks
Pen

[alf55]

I am using gnu bash 3.2
I need to split the string into array like

a=this_is_whole_world.file # split [_.]

I need to split this on _ and . some thing like this
a[0]=this
a[1]=is
a[2]=whole
a[3]=world
a[4]=file

preferable using bash regex. if not sed is also ok.

Thanks
Pen

string_var=this_is_whole_world.file
a=( $(echo "${string_var//[_\.]/ }") )

for i in "${!a[@]}"; do
    printf "%6d) '%s'\n" "$i" "${a[$i]}"
done

Results:

     0) 'this'
     1) 'is'
     2) 'whole'
     3) 'world'
     4) 'file'

[cfajohnson]

IFS=_. read -a a <<< "$a"