This Pull Request is for HacktoberFest 2020

Description of Change

Checklist

• Added description

Description of Change

References

Checklist

The Wikibase extension does not currently let the user upload "negative" dates (in the Julian/Gregorian calendars).

The currently supported formats are documented here: https://www.wikidata.org/wiki/Wikidata:Tools/OpenRefine/Editing/Schema_alignment#Dates

Proposed solution

Introduce a new syntax for those dates. For instance -YYYY or YYYY BCE could be used. Both are supported by Wik

steps to reproduce

Write a loop, from 1 to 80000, each time add a random int to the max heap.

In theory it takes very little time(NlogN, N=80000, <1sec ), but the program does take a long time.

I'v also tested the BinaryHeap in https://github.com/SolutionsDesign/Algorithmia, it performs well, so it is probably due to the bad algorithm.

In the following file we have already ported some tests from Go to Rust:
https://github.com/crossbeam-rs/crossbeam-channel/blob/master/tests/golang.rs

The idea is to blindly port all the tests for Go channels line by line, which will give us additional confidence in the correctness of crossbeam-channel.

In the test file, you can find stubs with links to the original tests written in Go and