splitpart.m

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function resStr=splitpart(inpStr,delimStr,fieldNum)
import mxberry.core.throwerror;
%
if ~(ischar(fieldNum)||isnumeric(fieldNum))
    throwerror(':wrongInput',...
        ['fieldNum parameter is expected to be either string or a ',...
        'value of a numeric type']);
end

strSplitList=strsplit(inpStr,delimStr);
nFound=length(strSplitList);
if nFound==0
    throwerror('wrongInput',...
        ['Opps, we shouldn''t be here - the number of ',...
        'splitted strings is zero']);
end
%
if ischar(fieldNum)
    switch lower(fieldNum)
        case 'first'
            fieldNum=1;
        case 'last'
            fieldNum=nFound;
    end
end
%
if nFound<fieldNum
    throwerror('wrongInput',...
        ['a number of splitted strings (%d) is too small for a ',...
        'specified position (%d)'],...
        nFound,fieldNum);
end
%
resStr=strSplitList{fieldNum};