diff options
Diffstat (limited to 'txr.1')
| -rw-r--r-- | txr.1 | 38 |
1 files changed, 38 insertions, 0 deletions
@@ -10370,6 +10370,44 @@ The copy-hash function is like make-similar-hash, except that instead of producing an empty hash table, it produces one which has all the same elements as <hash>: it contains the same key and value objects. +.SS Function inhash + +.TP +Syntax: + + (inhash <hash> <key> [<init>]) + +.TP +Description: + +The inhash function searches hash table <hash> for <key>. +If <key> is found, then it return the hash table's cons cell which +represents the association between <hash> and <key>. +Otherwise, it returns nil. + +If argument <init> is specified, then the function will create +an entry for <key> in <hash> whose value is that of <init>. +The cons cell representing that association is returned. + +Note: for as long as the <key> continues to exist inside <hash>. modifying the +car field of the returned cons has ramifications for the logical integrity of +the hash. Modifying the cdr field has the effect of updating the association. + +.SS Function gethash + +.TP +Syntax: + + (gethash <hash> <key> [<alt>]) + +.TP +Description: + +The gethash function searches hash table <hash> for key <key>. If the +key is found then the associated value is returned. Otherwise, if +the <alt> argument was specified, it is returned. If the <alt> argument +was not specified, nil is returned. + .SS Function sethash .TP |