* 用来将Promise.all转换为Object的格式 * let [ * a, * b * ] = await Promise.all([ * getA(), * getB() * ]) * * ====> * * let { * a, * b * } = await promiseMap({ * a: getA(), * b: getB() * }) * * 减少因数组解构下标带来的记忆成本 * @param {Object} promises
(promises)
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