make atIndex lens safe: if bad index, get nothing, do nothing on set - Githubissues

Super-Fluid / heqet

Organize Euterpea music for real instruments and create scores with Lilypond

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make atIndex lens safe: if bad index, get nothing, do nothing on set #29

Open Super-Fluid opened 8 years ago

Super-Fluid commented 8 years ago

atIndex is a prism, not a lens!