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Deque

A deque, or double-ended queue is a data structure which unites the properties of a queue and a stack. Like the stack, items can be pushed into the deque; once inserted into the deque the last item pushed in may be extracted from one side (popped, as in a stack), and the first item pushed in may be pulled out of the other side (as in a queue).

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Reformed churches

... include the Church of Scotland, the established church in Scotland and smaller denominations such as the Free Church of Scotland[?] and the Free Presbyterian ...

 
 
 
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