Rexx SUBSTR: 1-Based Indexing Is a Feature, Not an Off-by-One Bug
Rexx SUBSTR counts from 1, not 0. That makes fixed-width extraction arithmetic-free — and breaks ported code. Here's how to use it, plus the padding and byte-counting traps.
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Rexx SUBSTR counts from 1, not 0. That makes fixed-width extraction arithmetic-free — and breaks ported code. Here's how to use it, plus the padding and byte-counting traps.
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