diff options
Diffstat (limited to 'txr.1')
| -rw-r--r-- | txr.1 | 20 |
1 files changed, 16 insertions, 4 deletions
@@ -29782,12 +29782,11 @@ The arguments .meta haystack and .meta needle -are sequences: lists, vectors -or strings, in any combination. +are sequences. They may not be hash tables. If .meta needle -is not empty, then occurs at some position N within +is not empty, then it occurs at some position N within .meta haystack if the first element of @@ -29865,7 +29864,9 @@ The .code rsearch function is like .code search -except that if +except for two differences. + +Firstly, if .meta needle matches .meta haystack @@ -29874,6 +29875,17 @@ in multiple places, returns the right-most matching position rather than the leftmost. +Secondly, if +.meta needle +is an empty sequence, then +.code rsearch +returns the length of +.codn haystack , +thereby effectively declaring that the rightmost match for an empty +.meta needle +key occurs at the imaginary position past the element of +.metn haystack . + .coNP Functions @ ref and @ refset .synb .mets (ref < seq << index ) |