问题
using jquery, how would i find the closest match in an array, to a specified number
For example, you've got an array like this:
1, 3, 8, 10, 13, ...
What number is closest to 4?
4 would return 3
2 would return 3
5 would return 3
6 would return 8
ive seen this done in many different languages, but not in jquery, is this possible to do simply
回答1:
You can use the jQuery.each
method to loop the array, other than that it's just plain Javascript. Something like:
var theArray = [ 1, 3, 8, 10, 13 ];
var goal = 4;
var closest = null;
$.each(theArray, function(){
if (closest == null || Math.abs(this - goal) < Math.abs(closest - goal)) {
closest = this;
}
});
回答2:
Here's a generalized version, taken from: http://www.weask.us/entry/finding-closest-number-array
int nearest = -1;
int bestDistanceFoundYet = Integer.MAX_INTEGER;
// We iterate on the array...
for (int i = 0; i < array.length; i++) {
// if we found the desired number, we return it.
if (array[i] == desiredNumber) {
return array[i];
} else {
// else, we consider the difference between the desired number and the current number in the array.
int d = Math.abs(desiredNumber - array[i]);
if (d < bestDistanceFoundYet) {
// For the moment, this value is the nearest to the desired number...
nearest = array[i];
}
}
}
return nearest;
来源:https://stackoverflow.com/questions/3561275/using-jquery-how-would-i-find-the-closest-match-in-an-array-to-a-specified-num