Javascript 对象 push() 函数
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Javascript Object push() function
提问by Andrew Hymanman
I have a javascript object (I actually get the data through an ajax request):
我有一个 javascript 对象（我实际上是通过 ajax 请求获取数据的）：
var data = {};
I have added some stuff into it:
我在里面添加了一些东西：
data[0] = { "ID": "1"; "Status": "Valid" }
data[1] = { "ID": "2"; "Status": "Invalid" }
Now I want to remove all objects with an invalid status (but keep everything the ordering same):
现在我想删除所有状态无效的对象（但保持所有内容的顺序相同）：
var tempData = {};
for ( var index in data ) {
if ( data[index].Status == "Valid" ) {
tempData.push( data );
}
}
data = tempData;
In my mind, all of this should work, but I am getting an error that tempData.pushis not a function. I understand why it isn't the same as an array, but what could I do otherwise?
在我看来，所有这些都应该有效，但我收到了一个tempData.push不是函数的错误。我明白为什么它与数组不同，但我还能做什么？
回答by Matt Ball
push()is for arrays, not objects, so use the right data structure.
push()用于数组，而不是对象，因此请使用正确的数据结构。
var data = [];
// ...
data[0] = { "ID": "1", "Status": "Valid" };
data[1] = { "ID": "2", "Status": "Invalid" };
// ...
var tempData = [];
for ( var index=0; index<data.length; index++ ) {
if ( data[index].Status == "Valid" ) {
tempData.push( data );
}
}
data = tempData;
回答by csantana
Objects does not support push property, but you can save it as well using the index as key,
对象不支持推送属性，但您也可以使用索引作为键来保存它，
var tempData = {};
for ( var index in data ) {
if ( data[index].Status == "Valid" ) {
tempData[index] = data;
}
}
data = tempData;I think this is easier if remove the object if its status is invalid, by doing.
我认为如果删除对象，如果其状态无效，这样做会更容易。
for(var index in data){
if(data[index].Status == "Invalid"){
delete data[index];
}
}And finally you don't need to create a var temp –
最后你不需要创建一个 var temp –
回答by Alex Dn
You must make var tempData = new Array();
你必须使 var tempData = new Array();
Push is an Array function.
Push 是一个数组函数。
回答by regex
Javascript programming language supports functional programming paradigm so you can do easily with these codes.
Javascript 编程语言支持函数式编程范式，因此您可以轻松地使用这些代码。
var data = [
{"Id": "1", "Status": "Valid"},
{"Id": "2", "Status": "Invalid"}
];
var isValid = function(data){
return data.Status === "Valid";
};
var valids = data.filter(isValid);
回答by Kamil Kie?czewski
I assume that REALLY you get object from server and want to get object on output
我假设您真的从服务器获取对象并希望在输出中获取对象
Object.keys(data).map(k=> data[k].Status=='Invalid' && delete data[k])
var data = { 5: { "ID": "0", "Status": "Valid" } }; // some OBJECT from server response
data = { ...data,
0: { "ID": "1", "Status": "Valid" },
1: { "ID": "2", "Status": "Invalid" },
2: { "ID": "3", "Status": "Valid" }
}
// solution 1: where output is sorted filtred array
let arr=Object.keys(data).filter(k=> data[k].Status!='Invalid').map(k=>data[k]).sort((a,b)=>+a.ID-b.ID);
// solution2: where output is filtered object
Object.keys(data).map(k=> data[k].Status=='Invalid' && delete data[k])
// show
console.log('Object',data);
console.log('Array ',arr);回答by user3094826
tempData.push( data[index] );
I agree with the correct answer above, but.... your still not giving the index value for the data that you want to add to tempData. Without the [index] value the whole array will be added.
我同意上面的正确答案，但是.... 您仍然没有为要添加到 tempData 的数据提供索引值。如果没有 [index] 值，整个数组将被添加。
回答by Sudhir Bastakoti
Do :
做 ：
var data = new Array();
var tempData = new Array();
