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[英]JavaScript: Create a function defineFirstArg that accepts a function and an argument; Accept More Arguments
[英]Create a function removeFromPlaylist that accepts two arguments (the playlist object and the artist name)
创建一个 function removeFromPlaylist
,它接受两个 arguments(播放列表 object 和艺术家姓名)。 function 的主体应该从播放列表中删除键值对并返回更新的播放列表。
我无法使用以下代码通过此测试:
function removeFromPlaylist(playlist, artistName) {
delete playlist.artistName
return playlist
}
要删除密钥,您必须使用方括号delete playlist[artistName]; 因为否则它会尝试删除“artistName”,你想删除值为artistName的键。
function removeFromPlaylist(playlist, artistName) { delete playlist[artistName]; return playlist; } let playlist = { song: 'Hello', artist: "Madonna", duration: "2:34" }; console.log ( removeFromPlaylist( playlist, "artist") );
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