查询重复数组中重复元素个数并将重复元素名称添加（1）（

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let arr = [{ name: "A", url: "xxxx" }, { name: "A", url: "xxxx" }, { name: "A", url: "xxxx" }, { name: "A.doc", url: "xxxx" }, { name: "A", url: "xxxx" }, { name: "C", url: "xxxx" }, { name: "V", url: "xxxx" }, { name: "B", url: "xxxx" }, { name: "C", url: "xxxx" }, { name: "C", url: "xxxx" }, { name: "A", url: "xxxx" }] function handleDuplicateNames(target, key) { let obj = {} //利用对象键名唯一性，查出元素出现的个数 target.forEach(item => { var name = item[key]; if (obj[name]) { console.log() item[key] = `${item[key]}(${obj[name]})`; obj[name] = obj[name] + 1; } else { obj[name] = 1; } }) } handleDuplicateNames(arr, 'name')