JS擺脫功能

Question

我有看起來像這樣的方法：

return AddedSoftware (software) { 
    this.softwares.map(function(soft) { 
     if(soft.id == software) { 
      return software.name; 
     } 
    }) 
} 

所以，我怎麼會分手，當現在soft.id == software它遍歷整個softwares它返回之前返回！

Answer 1

你會使用find()代替

return function AddedSoftware (software) { 
    let res = this.softwares.find(soft => soft.id == software); 
    // return the software's name if there's a match, or undefined 
    return res ? res.name : res; 
} 

這會給你的第一個對象符合條件。然後您可以從該對象獲得software.name。從文檔

摘錄：

The find() method returns a value of the first element in the array that satisfies the provided testing function. Otherwise undefined is returned.