var?collection?=?{
????2548:?{
??????album:?"Slippery?When?Wet",
??????artist:?"Bon?Jovi",
??????tracks:?[?
????????"Let?It?Rock",?
????????"You?Give?Love?a?Bad?Name"?
??????]
????},
????2468:?{
??????album:?"1999",
??????artist:?"Prince",
??????tracks:?[?
????????"1999",?
????????"Little?Red?Corvette"?
??????]
????},
????1245:?{
??????artist:?"Robert?Palmer",
??????tracks:?[?]
????},
????5439:?{
??????album:?"ABBA?Gold"
????}
};
//?Keep?a?copy?of?the?collection?for?tests
var?collectionCopy?=?JSON.parse(JSON.stringify(collection));
function?update(id,?prop,?value)?{
if(prop?!==?"tracks"?&&?value?!==?null){
??collection[id][prop]?=?value;
}else?if(prop?===?"tracks"?&&?value?!==?null){
??collection[id][prop].push(value);
}else?if(value?===?null){
??delete?collection[id]['artist'];??//問題在這里！！
}
??return?collection;
}
console.log(update(5439,?"artist",?""));如果我傳的第三個(gè)參數(shù)value為空的話，刪除artist這個(gè)屬性，為什么我這樣刪除不了？？
JSON的處理問題
慕勒5811226
2016-07-07 08:33:37
