[英]Loop over JSON items whether JSON object has multiple arrays or not
I have a working version of a function to loop through a single array in a JSON object, eg 我有一个函数的工作版本,可以循环通过JSON对象中的单个数组,例如
[{
"Name": "John",
"Surname": "Johnson"
}, {
"Name": "Peter",
"Surname": "Johnson"
}]
sample function: 样例功能:
function FindName(NameToFind, data1) {
objData = JSON.parse(data1);
for (var i = 0; i < objData.length; i++) {
var Name = objData[i].Name;
if (Name == NameToFind) {
alert("found!");
}
}
}
Now I need to change this function to allow for either single OR multiple arrays eg 现在,我需要更改此函数以允许单个或多个数组,例如
{
"Table1": [{
"Name": "John",
"Surname": "Johnson"
}, {
"Name": "Peter",
"Surname": "Johnson"
}],
"Table2": [{
"Name": "Sarah",
"Surname": "Parker"
},
{
"Name": "Jonah",
"Surname": "Hill"
}
]
}
Is there a way to determine whether the object has 1 array (like in first example) or more than one arrays (like in 2nd example), and any advice/guidance on how to extend the function to be able to loop through all the items whether it has 1 array or multiple arrays? 有没有一种方法可以确定对象是否具有1个数组(如第一个示例中的数组)或多个数组(如第二个示例中的数组),以及有关如何扩展功能以能够遍历所有项的任何建议/指导它有1个数组还是多个数组?
Your first object is an array, the second one isn't. 您的第一个对象是一个数组,第二个对象不是。
You can test if your argument is an array , or even just test 您可以测试参数是否为数组 ,甚至可以测试
if (objData[0]) // that's an array
EDIT : if you want to iterate over all properties of a (just json decoded) object, when it's not an array, you can do this : 编辑:如果要遍历(只是json解码的)对象的所有属性,则当它不是数组时,可以执行以下操作:
for (var key in objData) {
var value = objData[key];
// now use the key and the value
// for example key = "Table1"
// and value = [{"Name":"John","Surname":"Johnson"}, ... ]
}
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