题解 | #计数#
计数
https://www.nowcoder.com/practice/628339bd8e6e440590ad86caa7ac6849
function count(arr, item) { let res = new Array(); res = arr.filter(e => { return e == item; }) return res.length; }
计数
https://www.nowcoder.com/practice/628339bd8e6e440590ad86caa7ac6849
function count(arr, item) { let res = new Array(); res = arr.filter(e => { return e == item; }) return res.length; }
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