SameValueZero
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What is SameValueZero?
SameValueZero is an equality algorithm used internally by JavaScript in methods like Array.prototype.includes() and Map key comparison. It behaves like === but treats NaN as equal to itself. Unlike SameValue, it considers +0 and -0 as equal.
Free resources to learn SameValueZero
- ArticleSame-value-zero equality
More in stage 8: Expressions & Operators
SameValueZero: common questions
Can I learn SameValueZero in Hindi?
This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain SameValueZero in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.
Is this SameValueZero tutorial for beginners?
It is lesson 67 of 124 in the free JavaScript roadmap, in stage 8, Expressions & Operators. If you are new to JavaScript, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.