I have a local JSON dataset (outlined below) and am trying to use the _.where method to retrieve specific values from within the dataset.
我有一个本地JSON数据集(概述如下)，并试图使用_。从数据集中检索特定值的方法。
JSON File
JSON文件
"data": [{
"singles_ranking": [116],
"matches_lost": ["90"],
"singles_high_rank": [79],
"matches_won": ["170"],
"singles_ranking/_source": ["116"],
"year_matches_won": ["11"],
"name": ["Pfizenmaier Dinah"],
"gender": ["woman"],
"_resultNumber": 1,
},{etc},{etc}];
Currently I am trying to retrieve values from within the dataset like so:
目前我正在尝试从数据集中检索值，如下所示:
var mappedPlayers = _.map(players,function(key,val){return key});
var filteredPlayers = _.where(mappedPlayers, {name:'Pfizenmaier Dinah'});
console.log(filteredPlayers);
This currently returns undefined. I am 90% sure that this is because the key values are stored within an array however, I am not sure how I can modify this _.where condition to actually make it return the text within the value attribute.
这个目前返回定义。我90%确信这是因为键值存储在数组中，但是我不确定如何修改这个_。当条件实际使它返回值属性中的文本时。
Any help would be greatly welcomed. Thank you for reading!
任何帮助都会受到极大的欢迎。感谢您的阅读!
1 个解决方案
#1
1
With ._where it is not possible, but you can use _.filter, like so
有。_where是不可能的，但是你可以用_。过滤器,这样
var where = {key: 'name', value: 'Pfizenmaier Dinah'};
var filteredPlayers = _.filter(players, function (el) {
// check if key exists in Object, check is value is Array, check if where.value exists in Array
return el[where.key] && _.isArray(el[where.key]) && _.indexOf(el[where.key], where.value) >= 0;
});
例子
#1
1
With ._where it is not possible, but you can use _.filter, like so
有。_where是不可能的，但是你可以用_。过滤器,这样
var where = {key: 'name', value: 'Pfizenmaier Dinah'};
var filteredPlayers = _.filter(players, function (el) {
// check if key exists in Object, check is value is Array, check if where.value exists in Array
return el[where.key] && _.isArray(el[where.key]) && _.indexOf(el[where.key], where.value) >= 0;
});
例子