Assuming you want to discard the {}s:

$str = 'Iteration {Applied Field}  {Total Energy}    Mx Fx {a} B C D {
+E F} G';;

print for split '(?:}\s+{|\s+{|}\s+|\s+(?!\S+}))', $str;;
Iteration
Applied Field
Total Energy
Mx
Fx
a
B
C
D
E F
G

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In reply to Re: Splitting string using two overlapping patterns by BrowserUk
in thread Splitting string using two overlapping patterns by kpr

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