Question

我有很多麻烦将来自thingspeak的数据转换为json响应。我有一个网址，其响应给了我很多领域。这是JSON的响应：

?({"channel":{"id":XXXXX,"name":"XXXXX","field1":"Temperature","field2":"Humidity","created_at":"2015-11-03T13:12:06Z","updated_at":"2015-11-15T12:07:37Z","last_entry_id":142},"feeds":[{"created_at":"2015-11-14T21:06:16Z","entry_id":136,"field1":"0"},{"created_at":"2015-11-14T21:06:39Z","entry_id":137,"field1":"25"},{"created_at":"2015-11-14T21:06:59Z","entry_id":138,"field1":"24.05"},{"created_at":"2015-11-14T21:07:13Z","entry_id":139,"field1":"24.45"},{"created_at":"2015-11-14T21:08:16Z","entry_id":140,"field1":"24.45"},{"created_at":"2015-11-15T12:06:18Z","entry_id":141,"field1":"24.5"},{"created_at":"2015-11-15T12:07:37Z","entry_id":142,"field1":"21.4"}]})

我想检索每个field1数据的最大值和最小值。我一直在阅读并且响应不在int中，因此应该转换为int数组。

这是我目前的代码：

$.getJSON('http://api.thingspeak.com/channels/'+channel+'/field/1.json?callback=?',
                {key: read_API_key, days: "1"},
                function(data) {
                    $.each(data.feeds, function() {
                        var temp_vals = this.field1;
                        var temp_vals_date = this.created_at;
                        console.log(temp_vals);
                    });
                }
            );

我想在feed数组中搜索，查找field1数字并保存到int数组中，然后使用Math.max.apply(Math, temp_vals);进行数学运算使用控制台，值正确保存到temp_vals，但我无法使用该功能，并出现以下错误：Function.prototype.apply: Arguments list has wrong type。

因此，如何将响应更改为int数组或能够找到最大值和最小值的内容？还有一个简单的问题，就是在$ .each（data.feeds，function（）{}）之外打印值的任何方法，因为我没有找到办法做到这一点....

更改为parseInt：

$.getJSON('http://api.thingspeak.com/channels/'+channel+'/field/1.json?callback=?',
                {key: read_API_key, days: "1"},
                function(data) {
                    $.each(data.feeds, function() {
                        var temp_vals = parseInt(this.field1);
                        var temp_vals_date = this.created_at;
                        var temp_max = Math.max.apply(Math, temp_vals);
                        console.log(temp_max);

                        $('#temp1_max').text(temp_max + ' ºC');

                        console.log(temp_vals);
                    });
                }
            );

Answer 1

使用parseInt

var temp_vals = parseInt( this.field1 );

编辑：

$.getJSON('http://api.thingspeak.com/channels/'+channel+'/field/1.json?callback=?',
                {key: read_API_key, days: "1"},
                function(data) {
                 var temp_vals = [];
                    $.each(data.feeds, function() {
                        temp_vals.push( parseInt( this.field1 ) );
                        var temp_vals_date = this.created_at;
                    });
                     var temp_max = Math.max.apply(Math, temp_vals);
                     console.log(temp_max);
                     console.log(temp_vals);
                     $('#temp1_max').text(temp_max + ' ºC');
                }
            );

将json数组响应更改为int数组

1 个答案: