diff options
Diffstat (limited to 'txr.1')
| -rw-r--r-- | txr.1 | 18 |
1 files changed, 16 insertions, 2 deletions
@@ -36795,11 +36795,25 @@ is invoked with two arguments: the accumulator from step 2, and the original element from .metn seq . .IP 4. -The resulting value is stored back into the hash table under the -same key. +The resulting value from step 3 is stored back into the hash table under the +key from step 2. .RE .IP +After the above processing, one more step is performed if the +.meta filter-fun +argument is present. In this case, the hash table is destructively mapped through +.meta filter-fun +before being returned. That is to say, every value in the hash table is +projected through +.meta filter-fun +and stored back in the table under the same key, as if by an invocation the +.cblk +.meti (hash-update < hash << filter-fun ) +.cble +expression. + +.IP If .code group-reduce is invoked on an empty hash table, its net result closely resembles a |