reduce and reduceRight support other accumulator types, fix #10 #12
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What does this pull request add, improve or fixes?
Fixes #10
Can you explain why this improvement or fix may be useful?
As discussed in the issue. Note that the solution involves overloading the
reduce
andreduceRight
definitions to have versions that don't include aninitial
value. This matches with the way it's done in the TypeScript definitions for the nativereduce
andreduceRight
If you changed the code, have you added enough unit tests?
This is a TypeScript definitions fix, so there's no tests to add