Letter frequency: Difference between revisions
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Not a robot (talk | contribs) m (→{{header|PL/I}}: syntax highlighting) |
Drkameleon (talk | contribs) |
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}
valid: split "abcdefghijklmnopqrstuvwxyz"
frequencies: #[]
loop split lower source 'ch [
if in?
if not? key? frequencies ch ->
set frequencies ch 0
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