find the median of all values in a map in javascript

Assuming the values in your map are numerical, you can use the following code to find the median:


index.tsx
const mapValues = myMap.values(); // get all the values of the map
const sortedValues = [...mapValues].sort((a, b) => a - b); // sort the values in ascending order

if (sortedValues.length % 2 === 0) { // if there are an even number of values
  const midIndex = sortedValues.length / 2;
  const median = (sortedValues[midIndex - 1] + sortedValues[midIndex]) / 2;
  console.log(median);
} else { // if there are an odd number of values
  const midIndex = Math.floor(sortedValues.length / 2);
  const median = sortedValues[midIndex];
  console.log(median);
}
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Explanation:

myMap.values() returns an iterator for all the values in the map
...mapValues spreads the iterator into an array so we can sort the values
sort((a, b) => a - b) sorts the values in ascending order
sortedValues.length % 2 === 0 checks if there are an even number of values
If there are an even number of values, we take the two middle values and calculate their average to get the median
If there are an odd number of values, we take the middle value as the median.

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