Menu
I have two arrays containing objects. One contains keys in some order and another has data and I need to sort the data array in order against the given sorted key array. How can I do this?
var a = ['d','a','b','c'] ;
var b = [{a:1},{c:3},{d:4},{b:2}];
The result should be:
result = [{d:4},{a:1},{b:2},{c:3]
579
If you use the native array sort function, you can pass in a custom comparator to be used when sorting the array. The comparator should return a negative number if the first value is less than the second, zero if they're equal, and a positive number if the first value is greater.
Use the zip function: zip( *sorted( zip(arr1, arr2) ) ) This will do what you need.
To find the index of an object in an array, by a specific property: Use the map() method to iterate over the array, returning only the value of the relevant property. Call the indexOf() method on the returned from map array. The indexOf method returns the index of the first occurrence of a value in an array.
Try this
var a = ['d','a','b','c'] ;
var b = [{a:1},{c:3},{d:4},{b:2}];
b.sort(function(x,y){
var xkey = a.indexOf(Object.keys(x)[0]);
var ykey = a.indexOf(Object.keys(y)[0]);
return xkey - ykey;
})
document.body.innerHTML += JSON.stringify(b,0,4);If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
