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Access the specified element, with bounds checking.
value& at( string_view key);
Returns a reference to the mapped value of the element that matches
key
, otherwise throws.
Constant on average, worst case linear in size()
.
Strong guarantee.
A reference to the mapped value.
Name |
Description |
---|---|
|
The key of the element to find. |
Type |
Thrown On |
---|---|
|
if no such element exists. |