使用递归函数通过JSON字符串内穿越水平 [英] traversing through JSON string to inner levels using recursive function
问题描述
我有一个JSON输入，可以去任何数量级。
I have a JSON input which can go to any number of levels.
我给的输入样本
var d=getEntities( {"Categories":
{
"Facets":
[
{
"count": 1,
"entity": "Company",
"Company":
[
{
"entity": "Ford Motor Co",
"Ford_Motor_Co":
[
{
"count": 1,
"entity": "Ford"
}
]
}
]
},
{
"count": 4,
"entity": "Country",
"Country": [
{
"entity": "Germany",
"Germany": [
{
"count": 1,
"entity": "Germany"
}
],
"currency": "Euro (EUR)"
},
{
"entity": "Italy",
"Italy": [
{
"count": 1,
"entity": "Italy"
}
],
"currency": "Euro (EUR)"
},
{
"entity": "Japan",
"Japan": [
{
"count": 1,
"entity": "Japan"
}
],
"currency": "Yen (JPY)"
},
{
"entity": "South Korea",
"South_Korea": [
{
"count": 1,
"entity": "South Korea"
}
],
"currency": "Won (KRW)"
}
]
},
{"count": 5,
"entity": "Persons",
"Persons": [
{
"count": 2,
"entity": "Dodge"
},
{
"count": 1,
"entity": "Dodge Avenger"
},
{
"count": 1,
"entity": "Major League"
},
{
"count": 1,
"entity": "Sterling Heights"
}
]
}
]
}});
我想用递归的所有级别中添加键值实体到数组，
I want to add the key value "Entity" in all levels to an array using recursion,
我能使用字符串收集来自第一级数据
I'm able to collect the data from first level using the string
<html>
<head>
<script src="jquery.js" type="text/javascript"></script>
<script type="text/javascript" src="dataDumper.js"></script>
<script type="text/javascript">
var testJSON = {"Categories":
{
"Facets":
[
{
"count": 1,
"entity": "Company",
"Company":
[
{
"entity": "Ford Motor Co",
"Ford_Motor_Co":
[
{
"count": 1,
"entity": "Ford"
}
]
}
]
},
{
"count": 4,
"entity": "Country",
"Country": [
{
"entity": "Germany",
"Germany": [
{
"count": 1,
"entity": "Germany"
}
],
"currency": "Euro (EUR)"
},
{
"entity": "Italy",
"Italy": [
{
"count": 1,
"entity": "Italy"
}
],
"currency": "Euro (EUR)"
},
{
"entity": "Japan",
"Japan": [
{
"count": 1,
"entity": "Japan"
}
],
"currency": "Yen (JPY)"
},
{
"entity": "South Korea",
"South_Korea": [
{
"count": 1,
"entity": "South Korea"
}
],
"currency": "Won (KRW)"
}
]
},
{"count": 5,
"entity": "Persons",
"Persons": [
{
"count": 2,
"entity": "Dodge"
},
{
"count": 1,
"entity": "Dodge Avenger"
},
{
"count": 1,
"entity": "Major League"
},
{
"count": 1,
"entity": "Sterling Heights"
}
]
}
]
}};
function scan(obj)
{
var k;
if (obj.hasOwnProperty('entity')) {
for (k in obj){
if (obj.hasOwnProperty(k)){
scan( obj[k] );
}
}
}
else{
if(k=='entity')
{
alert(obj.entity);
}
}
};
scan(testJSON);
</script>
</head>
<body>
</body>
</html>
我如何使用递归函数获得在为JSON字符串内部级别？
How do I get in to the inner levels for JSON string using recursive functions?
推荐答案
我已经做了的jsfiddle 横穿每一个对象，数组和在JS对象，像这样的价值...
I have made a jsfiddle which traverses every object,array and value in the JS object like so...
function scan(obj)
{
var k;
if (obj instanceof Object) {
for (k in obj){
if (obj.hasOwnProperty(k)){
//recursive call to scan property
scan( obj[k] );
}
}
} else {
//not an Object so obj[k] here is a value
};
};
我没有得到任何错误递归（在Chrome）。你可以用它来你想要做什么？
I get no recursion error (in Chrome). Can you use this to do what you want?
如果你需要测试如果对象是一个阵列中使用如果（OBJ的instanceof阵列）
If you need to test if an object is an array use if (obj instanceof Array)
要测试一个对象有一个实体属性中使用如果（obj.hasOwnProperty（实体））
To test if an object has an "entity" property use if (obj.hasOwnProperty('entity'))
要添加（或修改现有的）实体属性中使用 obj.entity =值或 OBJ ['实体'] =值
To add (or modify an existing) "entity" property use obj.entity = value or obj['entity'] = value
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