JS实现JSON数组去重步骤详解

paylist:[{paymode:'1',payname:"现金"，paymoney:"20"},
{paymode:'2',payname:"支付宝"，paymoney:"50"},{paymode:'1',payname:"现金"，paymoney:"40"}]

function UniquePay(paylist){
 var payArr = [paylist[0]];
 for(var i = 1; i < paylist.length; i++){
 var payItem = paylist[i];
 var repeat = false;
 for (var j = 0; j < payArr.length; j++) {
 if (payItem.paymode == payArr[j].paymode) {
 payArr[j].paymoney = parseFloat(payArr[j].paymoney)+parseFloat(payItem.paymoney);
 repeat = true;
 break;
 }
 }
 if (!repeat) {
 payArr.push(payItem);
 }
 }
 return payArr;
}

/*
 * JSON数组去重
 * @param: [array] json Array
 * @param: [string] 唯一的key名，根据此键名进行去重
 */
function uniqueArray(array, key){
 var result = [array[0]];
 for(var i = 1; i < array.length; i++){
 var item = array[i];
 var repeat = false;
 for (var j = 0; j < result.length; j++) {
 if (item[key] == result[j][key]) {
 repeat = true;
 break;
 }
 }
 if (!repeat) {
 result.push(item);
 }
 }
 return result;
}