diff options
Diffstat (limited to 'txr.1')
| -rw-r--r-- | txr.1 | 19 |
1 files changed, 18 insertions, 1 deletions
@@ -33403,10 +33403,11 @@ is returned. (partition* "abcd" '(0 1 2 3)) -> nil .brev -.coNP Functions @ find and @ find-if +.coNP Functions @, find @ find-if and @ find-true .synb .mets (find < key < sequence >> [ testfun <> [ keyfun ]]) .mets (find-if < predfun >> { sequence | << hash } <> [ keyfun ]) +.mets (find-true < predfun >> { sequence | << hash } <> [ keyfun ]) .syne .desc The @@ -33415,6 +33416,12 @@ and .code find-if functions search through a sequence for an item which matches a key, or satisfies a predicate function, respectively. +The +.code find-true +function is a variant of +.code find-if +which returns the value of the predicate function, instead +of the item. The .meta keyfun @@ -33475,6 +33482,16 @@ of which are the hash values. If the caller doesn't specify a .meta keyfun then these cells are taken as their keys. +The +.code find-true +funtion's argument conventions and search semantics are identical to those of +.codn find-if , +but the return value is different. Instead of returning the found item, +.code find-true +returns the value which +.meta predfun +returned for the found item's key. + .coNP Functions @ rfind and @ rfind-if .synb .mets (rfind < key < sequence >> [ testfun <> [ keyfun ]]) |