There is a large pile of socks that must be paired by color. Given an array of integers representing the color of each sock, determine how many pairs of socks with matching colors there are.

There is a large pile of socks that must be paired by color. Given an array of integers representing the color of each sock, determine how many pairs of socks with matching colors there are.

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Large pile of socks

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Tags: colors each matching socks whatever

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Contributed on Sep 21 2021

Selfish Spider

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There is a large pile of socks that must be paired by color. Given an array of integers representing the color of each sock, determine how many pairs of socks with matching colors there are. Example There is one pair of color and one of color . There

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function sockMerchant(n, ar) { // Create an object to store the count of each color const colorCount = {}; // Count the occurrence of each color in the array for (let color of ar) { colorCount[color] = (colorCount[color] || 0) + 1; } // Calculate the number of pairs let pairs = 0; for (let color in colorCount) { pairs += Math.floor(colorCount[color] / 2); } return pairs; } // Example usage const n = 9; const ar = [10, 20, 20, 10, 10, 30, 50, 10, 20]; const result = sockMerchant(n, ar); console.log(result); // Output: 3

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Tags: javascript socks each matching colors

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Contributed on Jul 01 2023

Fancy Fly

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