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Array filter method to filter array elements

小云云

Release： 2018-03-21 09:32:46

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This article mainly shares with you how Array.prototype.filter filters elements in an array. I hope it can help you.

/**
 * @method reduce
 * @param {number}   item   当前迭代的数组元素
 * @param {number}   index  当前迭代的数组元素下下标
 * @param {array}    array  原数组
 */
  let arr = [1,2,6,3,4,5];
  let res = arr.filter(function(item,index,array){      //元素值，元素的索引，原数组。
      return (item>3);
  });
  console.log(res);//[6, 4, 5]

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The filter method can remove elements that do not match the array and return a new array.

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