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* Function GREPL
* replaces all the items in SET1 with all the items in SET2
* SET1/2 must have the form "ITEM ITEM ITEM " -- space at the end
* guido.milanese@unicatt.it
* requires "repl.inc"
* 31.07.2022
#################################################################
# MIT License - Copyright (c) 2022 Guido Milanese
# See file LICENSE in this package
#################################################################
define("grepl(Pass,Set1,Set2)datum,I,N,T1,T2,A1,A2")
-include "repl.inc"
:(grepl_end)
grepl
grepl_bg
T1 = TABLE()
T2 = TABLE()
N = 0
grepl1 N = N + 1
Set1 ? break(' ') . datum len(1) rem . Set1 :f(grepl1_nd)
T1[N] = datum :(grepl1)
grepl1_nd
N = 0
grepl2 N = N + 1
Set2 ? break(' ') . datum len(1) rem . Set2 :f(grepl2_nd)
T2[N] = datum :(grepl2)
grepl2_nd
A1 = convert(T1,"ARRAY")
A2 = convert(T2,"ARRAY")
grepl3_bg I = I + 1
Pass = repl(Pass,A1[I,2],A2[I,2]) :S(grepl3_bg)F(grepl3_nd)
grepl3_nd
grepl_rt grepl = Pass :(return)
grepl_end
*********************************************************************
* This function, as Phil Budne's "repl", replaces string/string
* but, as standard "replace", can replace a set with another set.
* In this way also Unicode chars can be replaced with no limitation
* since they are treated as strings.
* Text = "aiuole"
* S1 = "a e i o u "
* S2 = "1 2 3 4 5 "
* Text2 = grepl(Text,S1,S2)
* will output: "1354l2"
* But also:
* Text = "aiuole"
* S1 = "a e i o u "
* S2 = "ā ē ī ō ū "
* will output: "āīūōlē"
* the standard REPLACE ("aeiou" / "āēīōū") will fail
* because Unicode chars (>127 ASCII) do not have the same length of chars <127.
* Step by step:
* create two tables for sets: T1 and T2
* feed the tables scanning thes two sets (items must be separeted by spaces)
* convert from tables to arrays
* use REPL converting string/string in PASS:
* each item of SET1 is replaced by the corresponding item in S2
* if SET2 is shorter the exceeding item in SET1 is left unchanged
* if SET1 is shorter the exceeding item in SET2 is not used
* Please notice that separating items by spaces makes it possible to substitute
* also sets of strings, such as e.g. LaTeX accents.
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