jQuery 比较jquery中的两个数组
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Comparing two arrays in jquery
提问by user2137186
Using this code...
使用此代码...
var a = ['volvo','random data'];
var b = ['random data'];
var unique = $.grep(a, function(element) {
return $.inArray(element, b) == -1;
});
var result = unique ;
alert(result);
...I am able to find which element of Array "a" is not in Array "b".
...我能够找到数组“a”的哪个元素不在数组“b”中。
Now I need to find:
现在我需要找到：
- if an element of Array "a" is in Array "b"
- what is its index in Array "b"
- 如果数组“a”的元素在数组“b”中
- 它在数组“b”中的索引是什么
For example "Random data" is in both arrays, so I need to return its position in Array b which is zero index.
例如“随机数据”在两个数组中，所以我需要返回它在数组 b 中的位置，它是零索引。
回答by Matthias Holdorf
Regarding your comment, here is a solution:
关于您的评论，这是一个解决方案：
withjQuery:
使用jQuery：
$.each( a, function( key, value ) {
var index = $.inArray( value, b );
if( index != -1 ) {
console.log( index );
}
});
withoutjQuery:
没有jQuery：
a.forEach( function( value ) {
if( b.indexOf( value ) != -1 ) {
console.log( b.indexOf( value ) );
}
});
回答by user1983983
You could just iterate over a and use Array.prototype.indexOfto get the index of the element in b, if indexOfreturns -1b does not contain the element of a.
Array.prototype.indexOf如果indexOf返回-1b 不包含 a的元素，则可以迭代 a 并使用它来获取 b 中元素的索引。
var a = [...], b = [...]
a.forEach(function(el) {
if(b.indexOf(el) > 0) console.log(b.indexOf(el));
else console.log("b does not contain " + el);
});
回答by Vivek Pradhan
This should probably work:
这应该可以工作：
var positions = [];
for(var i=0;i<a.length;i++){
var result = [];
for(var j=0;j<b.length;j++){
if(a[i] == b[j])
result.push(i);
/*result array will have all the positions where a[i] is
found in array b */
}
positions.push(result);
/*For every i I update the required array into the final positions
as I need this check for every element */
}
So your final array would be something like:
所以你的最终数组将是这样的：
var positions = [[0,2],[1],[3]...]
//implies a[0] == b[0],b[2], a[1] == b[1] and so on.
Hope it helps
希望能帮助到你
回答by L10
You can try this:
你可以试试这个：
var a = ['volvo','random data'];
var b = ['random data'];
$.each(a,function(i,val){
var result=$.inArray(val,b);
if(result!=-1)
alert(result);
})
回答by Prince Prasad
Convert both array to string and compare
将两个数组都转换为字符串并进行比较
if (JSON.stringify(a) == JSON.stringify(b))
{
// your code here
}
