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Is there, like, a javascript library for manipulating midi files?

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4 2 20

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    Helo #JavaScript and TypeScript programmers. (To which I don't count myself, even if I have to use it a bit now and then.)This is an anti-pattern, right?if (foo.indexOf("bar") === 0) { ...}Because if foo does *not* start with "bar", indexOf() will still search through all of foo for "bar". Even if you are only interested in seeing whether foo *starts* with "bar".Or are JavaScript interpeters and JITters clever enough to recognise this and silently turn it into effectively a use of startsWith() anyway? I suspect so. But still, nicer to write it optimally (and more obviously) from the start, right? Like this:if (foo.startsWith("bar") { ...}
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    @eniko it's interesting to see how things shape up differently depending on perspective and use case. To embed the RSS feeds of my Fedi accounts on my website, the JS is just a trivial “call this XSLT on this XML”, and I would actually do without the JS if there was a way to, but I'm limited to the number of entries in the RSS and I don't even think it's possible to get user-specific tags via RSS at all. OTOH, once one has to use the API, JS for everything (like in your case) makes more sense.