diff options
Diffstat (limited to 'txr.1')
| -rw-r--r-- | txr.1 | 48 |
1 files changed, 43 insertions, 5 deletions
@@ -18184,16 +18184,16 @@ function applied to the corresponding element of the input list. .SS* Property Lists -.coNP Function @ prop -.synb -.mets (prop < plist << key ) -.syne -.desc A property list a flat list of even length consisting of interleaved pairs of property names (usually symbols) and their values (arbitrary objects). An example property list is (:a 1 :b "two") which contains two properties, :a having value 1, and :b having value "two". +.coNP Function @ prop +.synb +.mets (prop < plist << key ) +.syne +.desc The .code prop function searches property list @@ -18211,6 +18211,44 @@ found, or due to the property being present with a .code nil value. +The indicators in +.meta plist +are compared with +.meta key +using +.code eq +equality, allowing them to be symbols, characters or +.code fixnum +integers. + +.coNP Function @ memp +.synb +.mets (memp < key << plist ) +.syne +.desc +The +.code memp +function searches property list +.meta plist +for key +.metn key , +using +.code eq +equality. + +If the key is found, then the entire suffix of +.meta plist +beginning with the indicator is returned, such that the first +element of the returned list is +.meta key +and the second element is the property value. + +Note the reversed argument convention relative to the +.code prop +function, harmonizing with functions in the +.code member +family. + .SS* List Sorting Note: these functions operate on lists. The principal sorting function |