如何从JSON数组中删除元素 [英] How to remove element from JSON array
本文介绍了如何从JSON数组中删除元素的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我是新来的NodeJS和MongoDB。我的问题是我有以下类型的JSON
I'm new to nodejs and mongodb. My problem is I've a json of following type
{
_id: 199,
name: 'Rae Kohout',
scores: [
{ type: 'exam', score: 82.11742562118049 },
{ type: 'quiz', score: 49.61295450928224 },
{ type: 'homework', score: 28.86823689842918 },
{ type: 'homework', score: 5.861613903793295 }
]
}
在这里,我想比较比分为类型'功课',并删除它有最低的功课score.To解决这个我已经写了一些code像
Here I want to compare score for the type 'homework' and remove the homework which has lowest score.To solve this I've written some code like
var low = '';
for(var i=0;i<doc.scores.length;i++)
{
if(doc.scores[i].type == 'homework'){
if(low == ''){
low = doc.scores[i].score;
}
if( doc.scores[i].score > low ){
console.log("index for lowest score is " + i);
low = '';
}
}
}
现在我能找到得分最低的指标,并希望该指数以消除值。我试图用方法Array.splice()方法,但适用于仅阵列。谁能帮助我解决这个问题?
Now I'm able to find the index for the lowest score, and want to removes values at that index. I tried to use Array.splice() method but that works on Array only. can anyone help me to solve it ?
推荐答案
使用拼接
像这样:
doc.scores.splice(index, 1);
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