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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

  • findfirst, findlast, findnext and findprev now accept a character as first argument to search for that character in a string passed as the second argument ([#31664]).
  • 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]).
  • IPAddr subtypes now behave like scalars when used in broadcasting ([#32133]).
  • clamp can now handle missing values ([#31066]).

Libdl

  • dlopen() can now be invoked in do-block syntax, similar to open().

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

  • Fixed repr such that it displays Time as it would be entered in Julia ([#32103]).

Sockets

  • getipaddrs returns IP addresses in the order provided by libuv ([#32260]).
  • getipaddr prefers to return the first IPv4 interface address provided by libuv ([#32260]).

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.