我将以下JSON数据存储在文件中：
[
{
"AA+A":0.3021,
"A+AA":0.3021,
"AAAU+AA":0.0677,
"AA+AAAU":0.0677,
"AABA+AAAU":0.092,
"AAAU+AABA":0.092,
"AAC+AABA":0.1713,
"AABA+AAC":0.1713,
"ULE+DXB":-0.0614,
"DXB+ULE":-0.0614,
"ULE+FLKR":0.308,
"FLKR+ULE":0.308,
"BNTCW+BAPR": "NaN"
}
]
以及以下形式：
Stock1: -------
Stock1: -------
Submit
如何根据用户输入值（Stock1值和Stock2值）过滤JSON文件，并在div中显示数据，例如，如果数据不可用，则应该说“不可用”：
例如：
Stock1: AA
Stock1: A
Submit and display : 0.3021
要么
Stock1: A
Stock1: AA
Submit and display : 0.3021
您可以使用in运算符检查属性是否存在，然后基于该属性显示消息。
var data = [{"AA+A":0.3021,"A+AA":0.3021,"AAAU+AA":0.0677,"AA+AAAU":0.0677,"AABA+AAAU":0.092,"AAAU+AABA":0.092,"AAC+AABA":0.1713,"AABA+AAC":0.1713,"ULE+DXB":-0.0614,"DXB+ULE":-0.0614,"ULE+FLKR":0.308,"FLKR+ULE":0.308,"BNTCW+BAPR":"NaN"}];
// cache element to reuse
let $res = $('#res');
// cache elements and bind input event handlers
let $stks = $('#stock1,#stock2').on('input', function() {
// iterate over elements to get value and then generate key
let key = $stks.map(function() {
// get value
return this.value.trim();
})
// get result as an array and then join with + symbol
.get().join('+');
// show result baked on key
$res.text(key in data[0] ? data[0][key] : 'Not found')
})<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<input id="stock1"><input id="stock2">
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我来说两句