An attempt at Ruby type conditional expression support in MATLAB

do.m

%/
%  Developer : Srinivas Muddana (srinivas.muddana@gmail.com)
%  All code (c)2012 Srinivas Muddana. all rights reserved
% 
% do a = a*-1 if(a<0);
% can add a ternary operator too.??
function do(varargin)
    %expr = size(2*length(varargin) -1) ;
    expr = '';
    for(ii = 1:length(varargin))
        expr = [expr ' ' varargin{ii}];
    end
    [a,b, c, d] = regexp(expr, '(.*)if(.*)');

    bodyIndexRange = c{1}(1,:);
    ifBodyStr = expr(bodyIndexRange(1):bodyIndexRange(2));
    condIndexRange = c{1}(2,:);
    ifCondStr =  expr(condIndexRange(1):condIndexRange(2));
    
    code = ['if(' ifCondStr ')' char(10) ...
            ifBodyStr ';' char(10)...
            'end' char(10)];
    evalin('caller', code);
end