I'm trying to expand an array in bash:
FILES=(2009q{1..4})
echo ${FILES[@]}
echo ${FILES[@]}.zip
Output is:
2009q1 2009q2 2009q3 2009q4
2009q1 2009q2 2009q3 2009q4.zip
But how can I expand the last line as in echo 2009q{1..4}.zip expansion, so that the last line looked like:
2009q1.zip 2009q2.zip 2009q3.zip 2009q4.zip
... but using array FILES?
FILES=(2009q{1..4})
echo ${FILES[@]/%/.zip}
Output:
2009q1.zip 2009q2.zip 2009q3.zip 2009q4.zip
From Bash's Parameter Expansion:
${parameter/pattern/string}: The pattern is expanded to produce a pattern just as in filename expansion. Parameter is expanded and the longest match of pattern against its value is replaced with string. If pattern begins with '/', all matches of pattern are replaced with string. Normally only the first match is replaced. If pattern begins with '#', it must match at the beginning of the expanded value of parameter. If pattern begins with '%', it must match at the end of the expanded value of parameter. If string is null, matches of pattern are deleted and the / following pattern may be omitted. If parameter is '@' or '', the substitution operation is applied to each positional parameter in turn, and the expansion is the resultant list. If parameter is an array variable subscripted with '@' or '', the substitution operation is applied to each member of the array in turn, and the expansion is the resultant list.
You can use printf:
printf "%s.zip " "${FILES[@]}"
2009q1.zip 2009q2.zip 2009q3.zip 2009q4.zip
