限制解析JSON細節時檢索到的對象數

下面是我用JavaScript解析的JSON數據的一部分。限制解析JSON細節時檢索到的對象數

"credits":{ 
"cast":[{ 
    "id":819,"name":"Edward Norton","character":"The Narrator","order":0,"cast_id":4,"profile_path":"/iUiePUAQKN4GY6jorH9m23cbVli.jpg" 
    }, 



    {"id":287,"name":"Brad Pitt","character":"Tyler Durden","order":1,"cast_id":5,"profile_path":"/kc3M04QQAuZ9woUvH3Ju5T7ZqG5.jpg" 
    }, 

    {"id":1283,"name":"Helena Bonham Carter","character":"Marla Singer","order":2,"cast_id":6,"profile_path":"/58oJPFG1wefMC0Vj7sFzHPrm67J.jpg" 
    }, 

    {"id":7470,"name":"Meat Loaf","character":"Robert 'Bob' Paulson","order":3,"cast_id":7,"profile_path":"/pwNyXgegO1nlZ8uWT847JM8EjGj.jpg" 
    }, 

    {"id":7499,"name":"Jared Leto","character":"Angel Face","order":4,"cast_id":30,"profile_path":"/msugySeTCyCmlRWtyB6sMixTQYY.jpg" 
    }, 

    {"id":7471,"name":"Zach Grenier","character":"Richard Chesler","order":5,"cast_id":31,"profile_path":"/jghYiKdNkVehKpiVyE97AWrU9KQ.jpg" 
    }, 

    {"id":7497,"name":"Holt McCallany","character":"The Mechanic","order":6,"cast_id":32,"profile_path":"/hQBfcw9KVszdenlTZTR8AIrSpex.jpg" 
    }, 

    {"id":7498,"name":"Eion Bailey","character":"Ricky","order":7,"cast_id":33,"profile_path":"/4MnRgrwuiJvHsfoiJrIUL4TkfoC.jpg"}]

我用下面的代碼解析數據，它完美的工作。我的問題是，我想限制只有5

actor = 0, 
acting = []; 

for (actor = 0; actor < entries.credits.cast.length; actor++) { 
    acting.push(entries.credits.cast[actor].name + ' as ' 
       + entries.credits.cast[actor].character); 
} 

document.getElementById('cast').innerHTML = acting.join(', ');

來源

2014-01-28 Craig

;演員<條目。 credits.cast.length; actor ++）{'to'for（actor = 0; actor <5; actor ++）{'將從列表中拉出前五個。 –

@RyanWillis，但是當少於5時出現錯誤，所以'min（5，entries.credits.cast.length）'會比'5'更好0 –

我的不好，然後緊接着'acting = [] ;'你可以有'actlimit =（entries.credits.cast.length <5）？ entries.credits.cast.length：5;'並將'5'改爲'actlimit' –

你能做到這一點例如像提取演員的數量：更改爲`（演員= 0

var acting = []; 
var maxCount = 5; 
var count = entries.credits.cast.length; 
if(count > maxCount) count = maxCount; 
for (var actor = 0; actor < count; actor++) { 
    acting.push(entries.credits.cast[actor].name + ' as ' + entries.credits.cast[actor].character); 
} 

document.getElementById('cast').innerHTML = acting.join(', ');

來源

2014-01-28 20:51:00

非常感謝！ – Craig

限制解析JSON細節時檢索到的對象數

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