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23 lines
837 B
23 lines
837 B
// Delegates to `succ` on sucecss or to `fail` on error
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// ex: Thing.load(123, iferr(cb, thing => ...))
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const iferr = (fail, succ) => (err, ...a) => err ? fail(err) : succ(...a)
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// Like iferr, but also catches errors thrown from `succ` and passes to `fail`
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const tiferr = (fail, succ) => iferr(fail, (...a) => {
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try { succ(...a) }
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catch (err) { fail(err) }
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})
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// Delegate to the success function on success, throws the error otherwise
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// ex: Thing.load(123, throwerr(thing => ...))
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const throwerr = iferr.bind(null, err => { throw err })
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// Prints errors when one is passed, or does nothing otherwise
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// ex: Thing.load(123, printerr)
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const printerr = iferr(err => console.error(err), () => {})
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module.exports = exports = iferr
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exports.iferr = iferr
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exports.tiferr = tiferr
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exports.throwerr = throwerr
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exports.printerr = printerr
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