wlangstroth

# For those without rename
for i in *; do mv $i $i.mp3; done

# or

for f in *;do mv $f ${f/test/prod};done

# replace text in lots of files
perl -pi -e 's/wrong/right/g' *

wlangstroth

// Crockford's
function memoizer(memo, fundamental) {
    var shell = function (n) {
        var result = memo[n];
        if (typeof result !== 'number') {
            result = fundamental(shell, n);
            memo[n] = result;
        }
        return result;
    };