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Parsing a CSV-format data file Description Parsing a CSV-format data file line by line.
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readcsv.mos (!******************************************************* * Mosel Example Problems * * ====================== * * * * file readcsv.mos * * ```````````````` * * Example for the use of the Mosel language * * (Read a data file in CSV format) * * * * (c) 2014 Fair Isaac Corporation * * author: Y. Colombani * *******************************************************!) model readcsv uses 'mmsystem' declarations public example_file=` 1|Estaque|1/2/1980|13.2 2|Endoume|23/5/2001|-77.3 23|wrongly formatted line 3|Lodi|12/12/1999|1 ` l:text ndx:integer word:text when:date number:real end-declarations fopen("text:example_file",F_INPUT) setparam("sys_sepchar",getchar("|",1)) ! field separator setparam("datefmt","%d/%m/%y") ! date format while (readtextline(l)>0) do trim(l,SYS_RIGHT) ! remove end of line character setparam("sys_endparse",0) ! start parsing b:=nextfield(l) ! jump to first field ndx:=parseint(l); b:=b and nextfield(l) ! parse an integer, word:=parsetext(l); b:=b and nextfield(l) ! some text, parseextn(l,when); b:=b and nextfield(l) ! a date, number:=parsereal(l) ! and a number if not b then writeln("!! Line not properly formatted") else writeln("->",ndx,"\t",word,"\t",when,"\t",number) end-if end-do end-model | |||||||||||
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