如何更改json键：值
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how to change json key:value
提问by NovaYear
//my json data
var jsndata = "{ "id": "5001", "type": "None" },
{ "id": "5002", "type": "Glazed" },
{ "id": "5005", "type": "Sugar" },
{ "id": "5003", "type": "Chocolate" },
{ "id": "5004", "type": "Maple" },
{ "id": "5009", "type": "Juice" }"
How would i change "type": "Chocolate"=> "type": "only water"
or.. "id": "5005"=> "id": "1234"
我将如何更改"type": "Chocolate"=>"type": "only water"
或.. "id": "5005"=>"id": "1234"
My list is very long.. I need get or set any value ?
我的列表很长.. 我需要获取或设置任何值吗？
Note: My list is dynamic and always sorting order by id or type..
注意：我的列表是动态的，总是按 ID 或类型排序。
Will jsndata.id['5003']='1234'change it?
会jsndata.id['5003']='1234'改变吗？
var getval = jsndata.id['5005'].typeget val..(value Sugar) ?
var getval = jsndata.id['5005'].type获得价值..（价值糖）？
回答by St.Woland
<script>
var json = [{ "id": "5001", "type": "None" },
{ "id": "5002", "type": "Glazed" },
{ "id": "5005", "type": "Sugar" },
{ "id": "5003", "type": "Chocolate" },
{ "id": "5004", "type": "Maple" },
{ "id": "5009", "type": "Juice" }];
/**
* The function searches over the array by certain field value,
* and replaces occurences with the parameter provided.
*
* @param string field Name of the object field to compare
* @param string oldvalue Value to compare against
* @param string newvalue Value to replace mathes with
*/
function replaceByValue( field, oldvalue, newvalue ) {
for( var k = 0; k < json.length; ++k ) {
if( oldvalue == json[k][field] ) {
json[k][field] = newvalue ;
}
}
return json;
}
/**
* Let's test
*/
console.log(json);
replaceByValue('id','5001','5010')
console.log(json);
replaceByValue('type','Chocolate','only water')
console.log(json);
</script>
回答by Baggz
Take a look at Pinch, a (multi) data replacement tool for JavaScript objects/JSON. Here is a brief example how pinch.jscould be used in your case:
看看Pinch，一个用于 JavaScript 对象/JSON 的（多）数据替换工具。下面是一个简短的示例，说明如何在您的情况下使用pinch.js：
var data = [
{
id: 5001,
type: 'None'
},
{
id: 5002,
type: 'Glazed'
},
{
id: 5005,
type: 'Sugar'
},
{
id: 5003,
type: 'Chocolate'
},
{
id: 5004,
type: 'Maple'
},
{
id: 5009,
type: 'Juice'
}
];
pinch(data, '/id/', function(path, key, value) {
return (value === 5001) ? 5010 : value;
});
回答by zero8
try this. simplified.
尝试这个。简化。
var json = [{ "id": "5001", "type": "None" },
{ "id": "5002", "type": "Glazed" },
{ "id": "5005", "type": "Sugar" },
{ "id": "5003", "type": "Chocolate" },
{ "id": "5004", "type": "Maple" },
{ "id": "5009", "type": "Juice" }];
var JsonObject= JSON.parse(json);
$.each(JsonObject, function(key,value) {
if( JsonObject[key].id=='5005' ){
JsonObject[key].id='1234';
}
if( JsonObject[key].type=='Chocolate' ){
JsonObject[key].type='Only water';
}
});
回答by HattrickNZ
modified the function from above to be able to change all values of a key,and increment it by 1. And you can pass in the jsonObj
从上面修改函数以能够更改键的所有值，并将其递增 1。您可以传入 jsonObj
function replaceByValue( jsonObj, field, oldvalue, newvalue ) {
for( var k = 0; k < jsonObj.length; ++k ) {
jsonObj[k][field] = (newvalue *1)+k;
}
return jsonObj;
}
//example
//例子
var json = [{ "id": "5001", "type": "None" },
{ "id": "5002", "type": "Glazed" },
{ "id": "5005", "type": "Sugar" },
{ "id": "5003", "type": "Chocolate" },
{ "id": "5004", "type": "Maple" },
{ "id": "5009", "type": "Juice" }];
json;
replaceByValue( json, "id", "na", 123 );
json;
