Question

如何使用以下JSON检查或显示call_no IS NOT NULL的最后一个call_no。请帮忙。

[ { “CLIENT_NAME”：空， “call_no”： “空” }， { “CLIENT_NAME”：空， “call_no”：“null”}，{ “client_name”：“Acheiva Technologies”， “call_no”：1}，{ “client_name”：“Allied International”， “call_no”：2}，{“client_name”：“Advantage”，“call_no”：3}，{“client_name”：null，“call_no”：“null”}]

Answer 1

您可以使用 filter()

var data = [{
  "client_name": null,
  "call_no": "null"
}, {
  "client_name": null,
  "call_no": "null"
}, {
  "client_name": "Acheiva Technologies",
  "call_no": 1
}, {
  "client_name": "Allied International",
  "call_no": 2
}, {
  "client_name": "Advantage",
  "call_no": 3
}, {
  "client_name": null,
  "call_no": "null"
}];

// filtering elements 
var res = data.filter(function(v) {
   // checking `call_no` value
   return v["call_no"] !== "null";
});

// getting last object from filtered arrary
var result = res[res.length - 1];

// getting values from last object
document.write(result["call_no"],'<br>',result["client_name"]);

Answer 2

＆＃13;

var data = [{
  "client_name": null,
  "call_no": "null"
}, {
  "client_name": null,
  "call_no": "null"
}, {
  "client_name": "Acheiva Technologies",
  "call_no": 1
}, {
  "client_name": "Allied International",
  "call_no": 2
}, {
  "client_name": "Advantage",
  "call_no": 3
}, {
  "client_name": null,
  "call_no": "null"
}];

callNo = data[0].call_no;

for(i = 0; i < data.length; i++){
  if(data[i].call_no != "null"){
    callNo = data[i].call_no;
  } 
}
alert(callNo)

＆＃13;

如何从json数组

2 个答案: