在航班预订网站上工作。拥有json
文件,其中包含机场代码,城市名称和国家/地区名称。
[{"iata":"UTK","lon":"169.86667","iso":"MH","status":1,"name":"Utirik Airport","continent":"OC","type":"airport","lat":"11.233333","size":"small"}]
现在,如果我的iata
机场代码与UTK
匹配,我想返回该名称。
答案 0 :(得分:1)
使用filter()在Array
中找到iata
内的对象:
var arr = [{"iata":"UTK","lon":"169.86667","iso":"MH","status":1,"name":"Utirik Airport","continent":"OC","type":"airport","lat":"11.233333","size":"small"}];
function findByCode(arr, iata){
var filtered = arr.filter(function(e){return e.iata = iata});
return (filtered.length == 1) ? filtered[0]:undefined;
}
console.log(findByCode(arr,"UTK").name);
JS小提琴: http://jsfiddle.net/dE9nP/
答案 1 :(得分:0)
这是基本搜索!您需要遍历数组,并检查每个项目的匹配代码,然后返回结果。这是一个功能:
function findAirport(myArray, iata){
for(var i = 0; i < myArray.length; i++){
var item = myArray[i];
if(item["iata"] === iata){
return item;
}
}
return null;
}
您可以像这样使用该功能:
var airports = [{"iata":"UTK","lon":"169.86667","iso":"MH","status":1,"name":"Utirik Airport","continent":"OC","type":"airport","lat":"11.233333","size":"small"}];
var match = findAirport(airports, "UTK");
if(match){
console.log("name = " + match.name);
}
只是为了强调我使用简单的for循环优于其他函数,例如filter
,here is a performance test将我的答案与使用filter
的其他函数进行比较。我知道在大多数实际用例中它没有意义,但我想保留对jsperf链接的引用:)
注意:在编辑问号之前提供了此答案。在发布时,这个问题是要求javascript解决方案
答案 2 :(得分:0)
$string = '[{"iata":"UTK","lon":"169.86667","iso":"MH","status":1,"name":"Utirik Airport","continent":"OC","type":"airport","lat":"11.233333","size":"small"}]';
$data = json_decode($string);
echo count($data);
for($i=0;$i<count($data);$i++){
if($data[$i]->iata == 'UTK') echo $data[$i]->name;
}
如果文件中的数据而不是$ string,则可以使用file_get_contents;