Re: [Bug-apl] Not a bug, need help coding search&replace on a vector

[Juergen Sauermann]

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.