Comparing a string to (22) spaces

[jfdutcher]

The 'append' portion of  this clip works fine.....I need to determine whether or not the piece of  'rec1' represented by the 'substr' is all  spaces....in which case I don't need to append it to the block.  I've tried many variations to create a test for that condition,  none of which have passed muster as legitimate Rebol code....the current one included of course.

How can this be done  ?
 
allergys: make block! 3   ( j has been given a value outside this clip)
space: ' '
for j 1 66 22 [
    if (substr rec1 (y + j) + 117 22 > repeat space 22) [
   append allergys trim substr rec1 (y + j) + 117 22
   ]   
]   

[Graham]

Not sure what you're attempting here, but

empty? "--22spaces--"

should be true.

[jfdutcher]

Thank you Graham.....

Empty?  passes muster very well .......

J.D.