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python range function for js
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| function* range (...args) { | |
| if (args.length === 0) throw new Error('too few parameters') | |
| if (args.length === 1) args.unshift(undefined) // start = 0, stop | |
| const [start = 0, stop, step = 1] = args | |
| for (let k = start; (stop - k) * step > 0; k += step) yield k | |
| } | |
| // [...range(3)] === [0, 1, 2] | |
| // [...range(-5, -1)] === [-5, -4, -3, -2] | |
| // [...range(42, 32, -2)] === [42, 40, 38, 36, 34] |
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