Created
October 25, 2017 08:05
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| var files = [{name: "a", size: 120}, {name: "b", size: 220}, {name: "c", size: 320}, {name: "d", size: 420}, {name: "e", size: 520}] | |
| var files = files.reduce((sum, f) => {f.start = sum ; console.log(sum, f); return sum+f.size}, 0) |
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