diff --git a/README.md b/README.md index d01778d8b..16af20a52 100644 --- a/README.md +++ b/README.md @@ -4240,8 +4240,8 @@ const minBy = (arr, fn) => Math.min(...arr.map(typeof fn === 'function' ? fn : v Examples ```js -minBy([{ n: 4 }, { n: 2 }, { n: 8 }, { n: 6 }], o => o.n); // 8 -minBy([{ n: 4 }, { n: 2 }, { n: 8 }, { n: 6 }], 'n'); // 8 +minBy([{ n: 4 }, { n: 2 }, { n: 8 }, { n: 6 }], o => o.n); // 2 +minBy([{ n: 4 }, { n: 2 }, { n: 8 }, { n: 6 }], 'n'); // 2 ``` diff --git a/docs/index.html b/docs/index.html index d0b48334e..35a8033f7 100644 --- a/docs/index.html +++ b/docs/index.html @@ -946,8 +946,8 @@ own individual rating by supplying it as the third argument. }; 
median([5, 6, 50, 1, -5]); // 5

minBy

Returns the minimum value of an array, after mapping each element to a value using the provided function.

Use Array.map() to map each element to the value returned by fn, Math.min() to get the maximum value.

const minBy = (arr, fn) => Math.min(...arr.map(typeof fn === 'function' ? fn : val => val[fn]));
-
minBy([{ n: 4 }, { n: 2 }, { n: 8 }, { n: 6 }], o => o.n); // 8
-minBy([{ n: 4 }, { n: 2 }, { n: 8 }, { n: 6 }], 'n'); // 8
+
minBy([{ n: 4 }, { n: 2 }, { n: 8 }, { n: 6 }], o => o.n); // 2
+minBy([{ n: 4 }, { n: 2 }, { n: 8 }, { n: 6 }], 'n'); // 2

percentile

Uses the percentile formula to calculate how many numbers in the given array are less or equal to the given value.

Use Array.reduce() to calculate how many numbers are below the value and how many are the same value and apply the percentile formula.

const percentile = (arr, val) =>
   100 * arr.reduce((acc, v) => acc + (v < val ? 1 : 0) + (v === val ? 0.5 : 0), 0) / arr.length;
 
percentile([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], 6); // 55