20 lines
440 B
JavaScript
20 lines
440 B
JavaScript
|
'use strict';
|
||
|
|
|
||
|
|
module.exports = function median(key) {
|
||
|
|
var length = this.items.length;
|
||
|
|
|
||
|
|
|
||
|
|
if (key === undefined) {
|
||
|
|
if (length % 2 === 0) {
|
||
|
|
return (this.items[length / 2 - 1] + this.items[length / 2]) / 2;
|
||
|
|
}
|
||
|
|
|
||
|
|
return this.items[Math.floor(length / 2)];
|
||
|
|
}
|
||
|
|
|
||
|
|
if (length % 2 === 0) {
|
||
|
|
return (this.items[length / 2 - 1][key] + this.items[length / 2][key]) / 2;
|
||
|
|
}
|
||
|
|
|
||
|
|
return this.items[Math.floor(length / 2)][key];
|
||
|
|
};
|