/// <summary>

/// 数组去重

/// </summary>

/// <param name="fieldName">去重的字段名</param>

Array.prototype.distinct = function (fieldName) {

var arr = this;

var uniqueArr = [];

var includedKey = {};

for (var i = 0; i < arr.length; i++) {

var value = arr[i][fieldName];

if (includedKey[value]) continue;

uniqueArr.push(arr[i]);

includedKey[value] = 1;

}

return uniqueArr;

}

// 测试

var test = [{ id: '1' }, { id: '2' }, { id: '2' }, { id: '1' }, { id: '3' }];

test = test.distinct('id');

alert(JSON.stringify(test));

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