Example
method fetch(table,key,if_absent) {
table.do_associations(&(k,v){
if(k=key),{^v});
});
eval(if_absent)}
method fetch(table,key) {
fetch(table,key,
{error(“key “||print_string(key)||
“not found “)})}
fetch(zips,”Seattle”,{98195})
Previous slide
Next slide
Back to first slide
View graphic version