Here is the dyalog ⎕R (replace), you can find ⎕S too. It’s a nice interface, but not easy to remember everything. http://help.dyalog.com/14.1/Content/Language/System%20Functions/r.htm
> On Jun 21, 2016, at 10:10 PM, Christian Robert <christian.rob...@polymtl.ca> > wrote: > > Oh yes, would be nice. (pcre would be as nice as regex, may be more) > > make it a ⎕regex or ⎕pcre so, no need to load a specific .so file or )lib to > use it ;-) > > Ideal would be to be able to not only scan but be able to compile a pcre, > find patterns, search & replace ... > > I am dreaming, but still awake ... > > Xtian. > > > On 2016-06-21 22:39, Elias Mårtenson wrote: >> Would anyone be interested if I actually implemented support regex by >> calling into the C library? >> >> I'm envisioning something like this: >> >> * "^([a-z]+):([0-9]+)$" regex∆scan "foo:123"* >> ┏→━━━━━━━━━━┓ >> ┃"foo" "123"┃ >> ┗∊━━━━━━━━━━┛ >> >> Regards, >> Elias >> >> On 22 June 2016 at 10:35, Xiao-Yong Jin <jinxiaoy...@gmail.com >> <mailto:jinxiaoy...@gmail.com>> wrote: >> >> At some point I really wanted to implement the simplest editor, namely ed >> (it would be much better than any APL system has offered), in APL, but I >> never finished the regex part. Perhaps it would be a nice exercise for >> someone who’s interested in learning APL to actually implement some of the >> most used Unix command line utilities. >> >> > On Jun 21, 2016, at 8:53 PM, Christian Robert >> <christian.rob...@polymtl.ca<mailto:christian.rob...@polymtl.ca>> wrote: >> > >> > Hi, >> > >> > A more general purpose search&replace (some bug fixed), take (2), was >> "snr". >> > >> > >> > >> > )sic >> > )erase replace >> > ∇z←s replace p;fr;to;P;i;⎕io >> > ⍝ ------------- >> > →(2≤≡s)/ForEach >> > →(2≤⍴⍴s)/Matrix >> > →Vector >> > ⍝ ------------- >> > ForEach: z←{⍵ replace p}¨s ◊ →0 >> > Matrix: z←⊃ {⍵ replace p}¨ ⊂[2]s ◊ →0 >> > ⍝ ------------- >> > Vector: p←,¨p ◊ z←s←,s ⋄ ⎕io←1 >> > Loop:→((⍴p)<2)/0 >> > (fr to)←2↑p ◊ p←2↓p >> > P←¯1↓∧/[1](¯1+⍳⍴fr)⌽fr∘.=z,⎕ucs 1 >> > i←0 >> > Sanitize: i←i+1 >> > →(i>(⍴P)-⍴fr)/Substitute >> > →(0=P[i])/Sanitize >> > ((⊂ i+¯1+⍳⍴fr)⌷P)←(⍴fr)↑1 >> > →Sanitize >> > Substitute: P←⌽(P/⍳⍴P) >> > ⊣ {z←((¯1+⍵)↑z),to,(¯1+⍵+⍴fr)↓z}¨P >> > →Loop >> > ∇ >> > >> > It should be vector, matrix and embedded objects "aware" (as long as it >> is all text) >> > >> > Syntax: >> > >> > source replace "this" "by_that" "this" "by_that" [...] (eg: pairs of >> "from" and "to") >> > >> > Examples: >> > >> > (⎕cr 'replace') replace 'replace' 'snr' 'ForEach' "Each" >> "Substitute" "Subst" "Sanitize" "Sane" >> > z←s snr p;fr;to;P;i;⎕io >> > ⍝ ------------- >> > →(2≤≡s)/Each >> > →(2≤⍴⍴s)/Matrix >> > →Vector >> > ⍝ ------------- >> > Each: z←{⍵ snr p}¨s ◊ →0 >> > Matrix: z←⊃ {⍵ snr p}¨ ⊂[2]s ◊ →0 >> > ⍝ ------------- >> > Vector: p←,¨p ◊ z←s←,s ⋄ ⎕io←1 >> > Loop:→((⍴p)<2)/0 >> > (fr to)←2↑p ◊ p←2↓p >> > P←¯1↓∧/[1](¯1+⍳⍴fr)⌽fr∘.=z,⎕ucs 1 >> > i←0 >> > Sane: i←i+1 >> > →(i>(⍴P)-⍴fr)/Subst >> > →(0=P[i])/Sane >> > ((⊂ i+¯1+⍳⍴fr)⌷P)←(⍴fr)↑1 >> > →Sane >> > Subst: P←⌽(P/⍳⍴P) >> > ⊣ {z←((¯1+⍵)↑z),to,(¯1+⍵+⍴fr)↓z}¨P >> > →Loop >> > >> > >> > You can even try "⎕fx" the result if it looks like Ok. (ps: always >> check the result before committing) >> > >> > Substitutions are done in pair sequence for each >> /vector/matrix/embedded obj. >> > >> > So replace order is *very* important. >> > >> > It must still have some bugs, report them to me, with examples if so. >> Will do my best but no promises. >> > >> > Purpose: well, not sure, it was an exercise. I used it on itself to >> finally rename the function and change some variables/labels names. >> > >> > >> > Features: would be fun to pass parameters to each of the /from/to/ like >> maximum number of substitutions to do per line ... >> > whole words only (taking apl characters as blanks) ... so >> variable "s" won't match last character of variable "pairs" >> > ... no limits >> > >> > >> > Xtian. >> > >> > >> > On 2016-06-21 12:27, Juergen Sauermann wrote: >> >> Hi Xtian, >> >> >> >> how about this: >> >> >> >> * >> **s←"444This4is4a4444test44with44444lot4of4blanks4444at4beginning4and444end444444"** >> >> from←"444"** >> >> ** to←"5"** >> >> ** >> >> ** ↑⍎')HOST echo "',s,'" | sed s/',from,'/',to,'/g'** >> >> **5This4is4a54test44with544lot4of4blanks54at4beginning4and5end55** >> >> ** ** >> >> *I have replaced the *^* in your example because it (and some other >> characters) have a special meaning in >> >> regular expressions. But the special characters can be easily quoted >> in APL if needed, for example: >> >> >> >> * >> s←"^^^This^is^a^^^^test^^with^^^^^lot^of^blanks^^^^at^beginning^and^^^end^^^^^^" >> ** >> >> ** ((s='^')/s)←⊂'\^'** >> >> ** ⊃,/s** >> >> >> **\^\^\^This\^is\^a\^\^\^\^test\^\^with\^\^\^\^\^lot\^of\^blanks\^\^\^\^at\^beginning\^and\^\^\^end\^\^\^\^\^\^** >> >> * >> >> /// Jürgen >> >> >> >> >> >> On 06/21/2016 05:12 AM, Christian Robert wrote: >> >>> Hi, it's not a bug but a request for help, >> >>> >> >>> >> >>> suppose >> s="^^^This^is^a^^^^test^^with^^^^^lot^of^blanks^^^^at^beginning^and^^^end^^^^^^" >> >>> suppose from="^^^" >> >>> suppose to="^" >> >>> >> >>> I need a function who can replace ("^^^" to "^"), or ("^" to >> "^^^^^^^^") or ("" to "blabla" with limits of source size) ie: without >> being lost in infinite loop. >> >>> >> >>> >> >>> >> >>> "s" is a character vector, "from" is a character vector, and "to" is >> a character vector, >> >>> both "s", "from" and "to" can be "". >> >>> >> >>> >> >>> >> >>> I'm pretty sure this idiom already exist. >> >>> >> >>> if you can help me, please do. >> >>> >> >>> Xtian. >> >>> >> >>> >> >>> >> >>> >> >>> >> >>> >> >>
