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61 lines
1.6 KiB
Markdown
61 lines
1.6 KiB
Markdown
# <small>nlohmann::basic_json::</small>array
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```cpp
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static basic_json array(initializer_list_t init = {});
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```
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Creates a JSON array value from a given initializer list. That is, given a list of values `a, b, c`, creates the JSON
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value `#!json [a, b, c]`. If the initializer list is empty, the empty array `#!json []` is created.
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## Parameters
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`init` (in)
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: initializer list with JSON values to create an array from (optional)
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## Return value
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JSON array value
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## Exception safety
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Strong guarantee: if an exception is thrown, there are no changes in the JSON value.
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## Complexity
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Linear in the size of `init`.
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## Notes
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This function is only needed to express two edge cases that cannot be realized with the initializer list constructor
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([`basic_json(initializer_list_t, bool, value_t)`](basic_json.md)). These cases are:
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1. creating an array whose elements are all pairs whose first element is a string -- in this case, the initializer list
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constructor would create an object, taking the first elements as keys
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2. creating an empty array -- passing the empty initializer list to the initializer list constructor yields an empty
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object
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## Examples
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??? example
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The following code shows an example for the `array` function.
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```cpp
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--8<-- "examples/array.cpp"
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```
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Output:
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```json
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--8<-- "examples/array.output"
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```
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## See also
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- [`basic_json(initializer_list_t)`](basic_json.md) - create a JSON value from an initializer list
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- [`object`](object.md) - create a JSON object value from an initializer list
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## Version history
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- Added in version 1.0.0.
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