Check whether key exists

bash

echo '{"name":"alice"}' | jq 'has("name")'

Explanation

Use `has()` for existence checks before dereferencing fields.

Learn the surrounding workflow

Compare similar commands or jump into common fixes when this command is part of a bigger troubleshooting path.

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Select a top-level property by key.

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Return the keys of an object as an array.

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Select a value from a nested path.

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Avoid errors when a key may be missing.

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Return an item from an array by position.

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Return a subrange of elements.

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