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Julia v1.4 Release Notes

New language features

  • Structs with all isbits and isbitsunion fields are now stored inline in arrays ([#32448]).

Language changes

Multi-threading changes

Build system changes

New library functions

  • The splitpath function now accepts any AbstractString whereas previously it only accepted paths of type String ([#33012]).
  • The tempname function now takes an optional parent::AbstractString argument to give it a directory in which to attempt to produce a temporary path name ([#33090]).
  • The tempname function now takes a cleanup::Bool keyword argument defaulting to true, which causes the process to try to ensure that any file or directory at the path returned by tempname is deleted upon process exit ([#33090]).
  • The readdir function now takes a join::Bool keyword argument defaulting to false, which when set causes readdir to join its directory argument with each listed name ([#33113]).

Standard library changes

  • The methods of mktemp and mktempdir which take a function body to pass temporary paths to no longer throw errors if the path is already deleted when the function body returns ([#33091]).

Libdl

LinearAlgebra

  • qr and qr! functions support blocksize keyword argument ([#33053]).

SparseArrays

Dates

Statistics

Sockets

Deprecated or removed

External dependencies

Tooling Improvements