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[GNU ELPA] Dash version 2.19.1
From: |
ELPA update |
Subject: |
[GNU ELPA] Dash version 2.19.1 |
Date: |
Sun, 31 Mar 2024 05:14:40 -0400 |
Version 2.19.1 of package Dash has just been released in GNU ELPA.
You can now find it in M-x list-packages RET.
Dash describes itself as:
===============================
A modern list library for Emacs
===============================
More at https://elpa.gnu.org/packages/dash.html
## Summary:
A modern list API for Emacs.
## Recent NEWS:
# Dash NEWS -- history of user-visible changes
Copyright (C) 2012-2024 Free Software Foundation, Inc.
See the end of the file for license conditions.
## Change log
### From 2.19.1 to 2.20.0
#### Deprecations
- Calling `-zip` with two arguments now emits a warning. This
long-discouraged calling convention remains supported, but the
caller is now referred to the equivalent `-zip-pair` instead (Stefan
Monnier, #400).
- Calling `-zip-pair` with less than or more than two arguments is now
deprecated, and can be replaced with the equivalent call to
`-zip-lists` instead.
#### Fixes
- Fixed a regression from `2.18` in `-take` that caused it to
prematurely signal an error on improper lists (#393).
- The function `-pad` can now be called with zero lists as arguments.
- The functions `-union`, `-intersection`, and `-difference` now
return proper sets, without duplicate elements (#397).
- The functions `-same-items?` and `-permutations` now work on
multisets (lists with duplicate elements) (#390, #397, #399).
For example:
```el
(-same-items? '(1 1 2 3) '(3 1 2)) ; => t
(-permutations '(1 1 2)) ; => '((1 1 2) (1 2 1) (2 1 1))
```
- Several functions which are documented as returning a fresh, mutable
object (such as a copy of one of their arguments) are no longer
marked as `pure`. Pure functions called with constant arguments are
evaluated during byte-compilation; the resulting value is an
immutable constant, and thus unsafe to modify destructively. The
functions in question are: `-clone`, `-cons*`, `-drop-last`,
`-interleave`, `-interpose`, `-iota`, `-non-nil`, `-repeat`,
`-slice`, `-snoc`, `-split-at`, `-take`, `-take-last`.
#### New features
- The function `-contains?` now returns the matching tail of the list
instead of just `t`, similarly to `member` (#397).
- New function `-frequencies` that takes a list and counts how many
times each distinct element occurs in it (suggested by @ebpa, #209,
#214, #399).
- New functions `-zip-lists-fill` and `-unzip-lists` which are better
behaved versions of `-zip-fill` and `-unzip`, respectively (#400).
### From 2.19.0 to 2.19.1
#### Fixes
- Fixed a regression from `2.18` in `-is-suffix-p` which led to false
negatives when parts of the suffix appeared multiple times in the
list being searched (Bennett Rennier, #384).
### From 2.18.1 to 2.19.0
#### Fixes
- Reverted a breaking change introduced in `2.18.0` that caused the
threading macro `-->` to be indented differently from `->` and `->>`
(#375).
- Added and fixed Edebug specifications for many Dash macros (Philipp
Stephani, #380, #381).
#### New features
- The combinators `-on`, `-flip`, `-not`, `-andfn`, and `-orfn` now
return variadic functions that take any number of arguments (#308).
- New combinator `-rotate-args` similar to `-flip`, but for arbitrary
arglist rotations (suggested by @vapniks, #72).
- New function `-every` and its anaphoric macro counterpart `--every`.
They are like the existing `-every-p` and `--every-p`, respectively,
but return the last non-`nil` result instead of just `t`.
- New macro `--partition-after-pred` which affords
`-partition-after-pred` better performance (Per Weijnitz, #362).
### From 2.18.0 to 2.18.1
- Fixed a regression from `2.17` as well as a long-standing bug in
`--iterate`, which evaluated its arguments one too many times. This
in turn could lead to errors in `-flatten-n` when it tried
flattening certain structures too far (#373).
### From 2.17 to 2.18
This release absorbs the now obsolete `dash-functional` version
`1.3.0` into `dash`, and brings the very old version of `dash` on GNU
ELPA up to date.
Package maintainers should replace all uses of `dash-functional`,
which will eventually be deleted, with `dash` version `2.18.0`. For
more information on this, see:
https://github.com/magnars/dash.el/wiki/Obsoletion-of-dash-functional.el
- New function `-iota` for generating arithmetic sequences
(@holomorph, #215).
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