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.TH "ja (1)" "" "" "" ""
.hy
.SH NAME
.PP
ja - Jacinda: data filtering, processing, reporting
.SH SYNOPSIS
.PP
ja run src.jac -i data.txt
.PP
cat FILE1 FILE2 | ja `#\[lq]$0'
.PP
ja tc script.jac
.PP
ja e `11.67*1.2'
.SH DESCRIPTION
.PP
\f[B]Jacinda\f[R] is a data stream processing language \[`a] la AWK.
.SH SUBCOMMANDS
.PP
\f[B]run\f[R] - Run a program from file
.PP
\f[B]tc\f[R] - Typecheck a program
.PP
\f[B]e\f[R] - Evaluate an expression (without reference to a file)
.SH OPTIONS
.TP
\f[B]-h\f[R] \f[B]--help\f[R]
Display help
.TP
\f[B]-V\f[R] \f[B]--version\f[R]
Display version information
.SH LANGUAGE
.SS REGEX
.PP
Regular expressions follow Rust\[cq]s regex library:
https://docs.rs/regex/
.SS BUILTINS
.PP
\f[B]:i\f[R] Postfix operator: parse integer
.PP
\f[B]:f\f[R] Postfix operator: parse float
.PP
\f[B]#\f[R] Prefix operator: tally (count bytes in string)
.TP
\f[B],\f[R] Ternary operator: zip with
(a -> b -> c) -> Stream a -> Stream b -> Stream c
.TP
\f[B]|\f[R] Ternary operator: fold
Foldable f :=> (b -> a -> b) -> b -> f a -> b
.TP
\f[B]\[ha]\f[R] Ternary operator: scan
(b -> a -> b) -> b -> Stream a -> Stream b
.TP
\f[B]\[lq]\f[R] Binary operator: map
Functor f :=> a -> b -> f a -> f b
.TP
\f[B][:\f[R] Unary operator: const
a -> b -> a
.TP
\f[B]#.\f[R] Binary operator: filter
(a -> Bool) -> Stream a -> Stream a
.TP
\f[B].\f[R] Binary operator: prior
(a -> a -> a) -> Stream a -> Stream a
.PP
\f[B]max\f[R] Maximum of two values
.PP
\f[B]min\f[R] Minimum of two values
.PP
\f[B]&\f[R] Boolean and
.PP
\f[B]||\f[R] Boolean or
.PP
\f[B]!\f[R] Prefix boolean not
.PP
\f[B]\[ti]\f[R] Matches regex
.PP
\f[B]!\[ti]\f[R] Does not match
.PP
\f[B]ix\f[R] Line number
.TP
\f[B]substr\f[R] Extract substring
Str -> Int -> Int -> Str
.TP
\f[B]split\f[R] Split a string by regex
Str -> Regex -> List Str
.TP
\f[B]splitc\f[R] Split a string on a single character
Str -> Str -> List Str
.TP
\f[B]floor\f[R] Floor function
Float -> Int
.TP
\f[B]ceil\f[R] Ceiling function
Float -> Int
.PP
\f[B]sprintf\f[R] Convert an expression to a string using the format
string
.TP
\f[B]option\f[R] Option eliminator
b -> (a -> b) -> Option a -> b
.TP
\f[B]match\f[R]
Str -> Regex -> Option (Int .
Int)
.SS SYNTAX
.PP
\f[B]\[ga]n\f[R] nth field
.PP
\f[B]$n\f[R] nth column
.PP
\f[B]{%<pattern>}{<expr>}\f[R] Filtered stream on lines matching
<pattern>, defined by <expr>
.PP
\f[B]{<expr>}{<expr>}\f[R] Filtered stream defined by <expr>, on lines
satisfying a boolean expression.
.PP
\f[B]{|<expr>}\f[R] Stream defined by <expr>
.PP
\f[B]#t\f[R] Boolean literal
.PP
\f[B]_n\f[R] Negative number
.TP
\f[B].n\f[R] Extract the nth value
List a -> a
.PP
\f[B]->n\f[R] Get the nth element of a tuple
.SH BUGS
.PP
Please report any bugs you may come across to
https://github.com/vmchale/jacinda/issues
.SS Limitations
.PP
Note that \f[C]Option\f[R] is not implemented as a functor.
.SH COPYRIGHT
.PP
Copyright 2021-2022.
Vanessa McHale.
All Rights Reserved.
.SH AUTHORS
Vanessa McHale<vamchale@gmail.com>.