This time I will bring you some precautions when operating JSON arrays with JS. The following is a practical case. Let’s take a look.
Requirement description:Remove items with the same paymode field in the JSON array and accumulate paymoney.
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; }
General JSON array deduplication
/* * 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; }
I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the PHP Chinese website!
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