摘要：
countTotal调用示例： let arr = [ {id: 0, price: 199.88}, {id: 1, price: 299.88}, {id: 2, price: 399.88} ]; console.log(countTotal(arr, 'price')); //899.64 阅读全文
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摘要：
countTotal调用示例： let arr = [ {id: 0, price: 199.88}, {id: 1, price: 299.88}, {id: 2, price: 399.88} ]; console.log(countTotal(arr, 'price')); //899.64 阅读全文
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