[英]Find node by id in json tree
我想将children
数组添加到id = 52126f7d
(或其他)的节点。 我该怎么做?
var children = [
{ name: 'great-granchild3',
id: '2a12a10h'
},
{ name: 'great-granchild4',
id: 'bpme7qw0'
}
]
// json tree
var objects = {
name: 'all objects',
id:"2e6ca1c3",
children: [
{
name: 'child',
id: "6c03cfbe",
children: [
{ name: 'grandchild1',
id: "2790f59c"
},
{ name: 'grandchild2',
id: "52126f7d"
},
{ name: 'grandchild3',
id: "b402f14b"
},
{
name: 'grandchild4',
id: "6c03cff0",
children: [
{ name: 'great-grandchild1',
id: "ce90ffa6"
},
{ name: 'great-grandchild2',
id: "52f95f28"
}
]
}
]
},
{
name: 'child2',
id: "7693b310",
children: [
{ name: 'grandchild5',
id: "def86ecc"
},
{ name: 'grandchild6',
id: "6224a8f8"
}
]
}
]
}
结束
var objects = {
name: 'all objects',
id:"2e6ca1c3",
children: [
{
name: 'child',
id: "6c03cfbe",
children: [
{ name: 'grandchild1',
id: "2790f59c"
},
{ name: 'grandchild2',
id: "52126f7d",
children = [
{ name: 'great-granchild3',
id: '2a12a10h'
},
{ name: 'great-granchild4',
id: 'bpme7qw0'
}
]
},
{ name: 'grandchild3',
id: "b402f14b"
},
{
name: 'grandchild4',
id: "6c03cff0",
children: [
{ name: 'great-grandchild1',
id: "ce90ffa6"
},
{ name: 'great-grandchild2',
id: "52f95f28"
}
]
}
]
},
{
name: 'child2',
id: "7693b310",
children: [
{ name: 'grandchild5',
id: "def86ecc"
},
{ name: 'grandchild6',
id: "6224a8f8"
}
]
}
]
}
首先找到合适的节点。
function getNodeById(id, node){
var reduce = [].reduce;
function runner(result, node){
if(result || !node) return result;
return node.id === id && node || //is this the proper node?
runner(null, node.children) || //process this nodes children
reduce.call(Object(node), runner, result); //maybe this is some ArrayLike Structure
}
return runner(null, node);
}
var target = getNodeById("52126f7d", objects);
target.children = children;
怎么样:
objects.children[0].children[1].children = children;
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