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Diffstat (limited to 'txr.1')
| -rw-r--r-- | txr.1 | 63 |
1 files changed, 63 insertions, 0 deletions
@@ -37865,6 +37865,69 @@ is evaluated. If it is true, then the range stays active for the current record, but is deactivated when the processing of the record completes. +.coNP Macro @ ff +.synb +.mets (ff < opip-arg *) +.syne +.desc +The awk macro +.code ff +(filter fields) +provides a shorthand for filtering the field list +.code f +trough a pipeline of chained functions expressed using +.code opip +argument syntax. + +The following equivalence holds, except that +.code f +refers to the awk variable even if the +.code mf +invocation occurs in code which establishes +a binding which shadows +.codn f . + +.cblk + (ff a b c ...) <--> (set f [(opip a b c ...) f]) +.cble + +.TP* Example: +.cblk + ;; convert all fields from string to floating-point + (ff (mapcar flo-str)) +.cble + +.coNP Macro @ mf +.synb +.mets (mf < opip-arg *) +.syne +.desc +The awk macro +.code mf +(map fields) +provides a shorthand for mapping each field +individually trough a pipeline of chained functions expressed using +.code opip +argument syntax. + +The following equivalence holds, except that +.code f +refers to the awk variable even if the +.code mf +invocation occurs in code which establishes +a binding which shadows +.codn f . + +.cblk + (mf a b c ...) <--> (set f (mapcar (opip a b c ...) f)) +.cble + +.TP* Example: +.cblk + ;; convert all fields from string to floating-point + (mf flo-str) +.cble + .SS* Environment Variables and Command Line Note that environment variable names, their values, and command line |