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NEWS.md

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Julia v1.3 Release Notes

New language features

  • Support for Unicode 12.1.0 ([#32002]).

Language changes

Multi-threading changes

Build system changes

New library functions

  • New findall(pattern, string) method where pattern is a string or regex ([#31834]).

Standard library changes

  • Regex can now be multiplied (*) and exponentiated (^), like strings ([#23422]).
  • Cmd interpolation (`$(x::Cmd) a b c` where) now propagates x's process flags (environment, flags, working directory, etc) if x is the first interpolant and errors otherwise ([#24353]).

LinearAlgebra

  • The BLAS submodule no longer exports dot, which conflicts with that in LinearAlgebra ([#31838]).

  • diagm and spdiagm now accept optional m,n initial arguments to specify a size ([#31654]).

  • Hessenberg factorizations H now support efficient shifted solves (H+µI) \ b and determinants, and use a specialized tridiagonal factorization for Hermitian matrices. There is also a new UpperHessenberg matrix type ([#31853]).

SparseArrays

Dates

Statistics

  • mean now accepts both a function argument and a dims keyword ([#31576]).

Miscellaneous

  • foldr and mapfoldr now work on any iterator that supports Iterators.reverse, not just arrays ([#31781]).

External dependencies

Tooling Improvements

  • The ClangSA.jl static analysis package has been imported, which makes use of the clang static analyzer to validate GC invariants in Julia's C code. The analysis may be run using make -C src analyzegc.