isKey()
Containers
isKey() is a MATLAB®-compatible containers function for check whether a key exists in a containers.map. returns logical true/false. Run it online in your browser with SimLab — free, no install, no license required.
Check whether a key exists in a containers.Map. Returns logical true/false.
Syntax
m.isKey(key)
isKey(m, key)
Examples — run isKey() in your browser
has = m.isKey('a');▶ RunSee Also
Frequently Asked Questions about isKey()
Is the isKey() function free to use in SimLab?
Yes. SimLab is 100% free — no signup, no license, and no usage limits. You can run isKey() and 510+ other MATLAB®-compatible functions directly in your browser at simulations4all.com/simlab.
Do I need to install MATLAB to use isKey()?
No. SimLab runs entirely in your web browser with zero installation. The isKey() function works without any MATLAB® license or software download.
What does isKey() do?
Check whether a key exists in a containers.Map. Returns logical true/false. It is a MATLAB®-compatible containers function available in SimLab with the same calling syntax as MATLAB® — typically: m.isKey(key).
Can I run isKey() in my browser?
Yes. Open SimLab at simulations4all.com/simlab, write or paste code that calls isKey(), and run it. Execution happens locally in your browser — no data leaves your machine.
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