我有一个数组数组,我只想打印外部数组而不是内部数组。
例如我的数组是: -
[
"Stories",
"Tasks",
"In Progress",
"In Review",
"Completed",
[
{
"divName": "content-container2",
"content": "us 2345",
"topPos": 109,
"leftPos": 150
},
{
"divName": "content-container3",
"content": "Description",
"topPos": 98,
"leftPos": 382
},
{
"divName": "content-container4",
"content": "12212",
"topPos": 110,
"leftPos": 644
}
]
]
我只想展示[“故事”,“任务”,“进行中”,“审核中”,“已完成”],没有别的。
请建议如何在javascript中处理此事?
答案 0 :(得分:3)
在迭代array
时,检查其中每个项目的type
for (var i =0; i< arr.length; i++) {
if (typeof arr[i] === "string") {
console.log(arr[i]);
}
}
更好的方法(受此answer启发)
for (var i =0; i< arr.length; i++) {
if( Object.prototype.toString.call( arr[i] ) !== '[object Array]' ) {
console.log(arr[i]);
}
答案 1 :(得分:2)
您可以使用JavaScript's instanceof
operator遍历数组并检查每个值是否为数组。
var array = [], // This is your array
result = []; // This is the result array
// Loop through each index within our array
for (var i = 0; i < array.length; i++)
/* If the value held at the current index ISN'T an array
* add it to our result array. */
if (!(array[i] instanceof Array))
result.push(array[i]);
// Log the result array
console.log(result);
> ["Stories", "Tasks", "In Progress", "In Review", "Completed"]
答案 2 :(得分:0)
在更现代的浏览器中,这也有效:
array.filter(function(item){
return typeof(item) !== "object";
});
答案 3 :(得分:0)
非常简单,有三行你可以filter
数组:
// Arr is your Array :)
var result = arr.filter(function(value){
return typeof value != 'array' && typeof value != 'object';
});
// It shows ["Stories", "Tasks", "In Progress", "In Review", "Completed"]
console.log(result);
请参阅jsfiddle:http://jsfiddle.net/j4n99uw8/1/。
<强>已更新强>: 您还可以扩展阵列并在另一侧使用:
Array.prototype.oneDimension = function(){
return this.filter(function(value){
return typeof value != 'array' && typeof value != 'object';
});
};
// In each array you can use it:
console.log( arr.oneDimension() );
console.log( ['9',['9'],['2']].oneDimension() ); // Only contains '9'.
请参阅此jsfiddle:http://jsfiddle.net/j4n99uw8/2/