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Diffstat (limited to 'txr.1')
| -rw-r--r-- | txr.1 | 33 |
1 files changed, 33 insertions, 0 deletions
@@ -6626,6 +6626,21 @@ Examples: [(remql* 13 (range 1)) 0..100] +.SS Functions countqual, countql and countq + +.TP +Syntax: + + (countq <object> <list>) + (countql <object> <list>) + (countqual <object> <list>) + +.TP +Description + +The countq, countql and countqual functions count the number of objects +in <list> which are eq, eql or equal to <object>, and return the count. + .SH APPLICATIVE LIST PROCESSING .SS Functions remove-if, keep-if, remove-if* and keep-if* @@ -6676,6 +6691,24 @@ Examples: '(("abcd" 4) ("defg" 5))) -> (("defg 5)) +.SS Function count-if + +.TP +Syntax: + + (count-if <predicate-function> <list> : <key-function>) + +.TP +Description: + +The countove-if function counts the numer of elements of <list> which satisfy +<predicate-function> and returns the count. + +The optional <key-function> specifies how each element from the <list> is +transformed to an argument to <predicate-function>. If this argument is omitted +or specified as nil, then the predicate function is applied to the elements +directly, a behavior which is identical to <key-function> being (fun identity). + .SS Function tree-find .TP |