如何在ReactJS中使用lodash获得独特的价值?现在,我正在获取所有数据。但是如何避免打印重复数据?实际上,这是一个过滤器盒。因此,我必须避免数据重复。谁能帮我吗?
功能:
comboClick () {
var apiBaseUrl = "http://api.eventsacross-stage.railsfactory.com/api/";
var input = this.state.search_event;
let self = this;
axios.get(apiBaseUrl+'v1/events/?on_dashboard=false'+input)
.then(function (response) {
let events = response.data.events;
self.setState({events: events});
console.log(response);
})
.catch(function (error) {
console.log(error);
});
}
Jsx部分:
<div className="dropdown text-center">
<button
className="btn btn-default dropdown-toggle"
type="button"
data-toggle="dropdown"
style={{width: "50%"}}
onClick={this.comboClick.bind(this)}>
Place
<span className="caret"></span>
</button>
<ul className="dropdown-menu">
{this.state.events.map(function (event, i) {
return (
<div key={i}>
{event.locations.map(function (locations, j) {
return (
<li key={j}><p>{locations.city}</p></li>
)
})}
</div>
)
})}
</ul>
</div>
您可以_.uniqBy
根据文档使用:
此方法类似于_.uniq,不同之处在于它接受iteratee,后者会为数组中的每个元素调用以生成用于计算唯一性的标准。结果值的顺序取决于它们在数组中出现的顺序。使用一个参数(值)调用iteratee。
我添加了一个示例:
var locations =
[
{city:"city1"},
{city:"city2"},
{city:"city3"},
{city:"city1"},
];
var locationsUnique = _.uniq(locations, 'city');
console.log(locationsUnique);
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/2.4.1/lodash.min.js"></script>
更新:
从评论中共享的方法,我猜测您要执行的操作类似于:
comboClick() {
var apiBaseUrl = "api.eventsacross-stage.railsfactory.com/api/";
var input = this.state.search_event;
let self = this;
axios.get(apiBaseUrl + 'v1/events/?on_dashboard=false' + input).then(function(response) {
let events = response.data.events;
for (var i = 0; i < response.data.events_count; i++) {
var obj = response.data.events[i];
console.log(obj.locations);
//Assuming that obj.locations has the locations that you want to display
var locationsUnique = _.uniq(obj, 'city'); //Added this line
console.log(locationsUnique); //Added this line
}
for (var j = 0; j <= obj; j++) {}
self.setState({events: events});
}).catch(function(error) {
console.log(error);
});
}
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