javascript / intermediate
Snippet
Advanced Set Operations for Collection Logic
Newer versions of Node.js support native Set methods for mathematical operations. This eliminates the need for manual filtering or third-party libraries like Lodash for collection logic.
snippet.js
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const admins = new Set(['alice', 'bob']);const editors = new Set(['bob', 'charlie']);const intersection = admins.intersection(editors);// Set(1) { 'bob' }const diff = admins.difference(editors);// Set(1) { 'alice' }const combined = admins.union(editors);// Set(3) { 'alice', 'bob', 'charlie' }
nodejs
Breakdown
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admins.intersection(editors)
Returns a new Set containing only elements present in both sets.
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admins.difference(editors)
Returns a new Set with elements from the first set that are not in the second.