我有一些关于在 ruby 中使用 json 文件的问题。
所以我的 JSON 文件包含以下信息：
{
"2018-12-11": {
"USD": 1.1379,
"JPY": 128.75,
"BGN": 1.9558,
"CZK": 25.845,
"DKK": 7.4641,
"GBP": 0.90228,
"HUF": 323.4,
"PLN": 4.2983,
"RON": 4.6557,
"SEK": 10.297,
"CHF": 1.1248,
"ISK": 140.2,
"NOK": 9.7038,
"HRK": 7.3943,
"RUB": 75.5225,
"TRY": 6.1295,
"AUD": 1.5778,
"BRL": 4.4417,
"CAD": 1.5239,
"CNY": 7.8498,
"HKD": 8.8934,
"IDR": 16625.0,
"ILS": 4.2691,
"INR": 81.8215,
"KRW": 1284.17,
"MXN": 23.0209,
"MYR": 4.7615,
"NZD": 1.6526,
"PHP": 60.009,
"SGD": 1.5617,
"THB": 37.317,
"ZAR": 16.2903
},
"2018-12-10": {
"USD": 1.1425, …