1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
|
# SPDX-FileCopyrightText: Copyright © 2025 sterni
# SPDX-License-Identifier: GPL-3.0-only
# datetime.bqn
date ⇐ •Import "datetime.bqn"
AssertMatches ← {((•Repr 𝕨)∾"≢"∾•Repr 𝕩)!𝕨≡𝕩}
!∘date.IsLeap¨ ⟨400, 2000, 2016, 2024, 2032⟩
!∘¬∘date.IsLeap¨ ⟨100, 300, 1000, 1999, 2007⟩
! date.epochDelta=62167219200
! 146097=date.YearDays 400
⟨R⟩ ← •Import "run.bqn"
⟨FmtInt⟩ ← •Import "integer.bqn"
⟨_join⟩ ← •Import "string.bqn"
static ← ⟨¯1-date.epochDelta,0-date.epochDelta,1-date.epochDelta,¯1,0,1⟩
{𝕊 t:
•Out "date.FromUnix "∾•Fmt t
d ← date.FromUnix t
t AssertMatches date.ToUnix d
# TODO(sterni): ToRfc3339 uses 4 digit years, GNU date(1) more as needed
exp ← R "date"‿"--utc"‿"+%-Y,%-m,%-d,%-H,%-M,%-S"‿("--date=@"∾FmtInt t)
exp AssertMatches ',' _join FmtInt¨ d.year‿d.month‿d.day‿d.hour‿d.minute‿d.second
}¨ static∾⥊date.epochDelta‿0+¯1‿1×⌜1000 •rand.Range ¯1+2⋆53
# integer.bqn
⟨ParseInt,QuotRem,Tr,ToMixedRadix⟩ ⇐ •Import "integer.bqn"
! ((ParseInt •Fmt)¨ ≡ ⊢) (-∾⊢) 1000 •rand.Range 4294967296
! ((ParseInt FmtInt)¨ ≡ ⊢) (-∾⊢) 1000 •rand.Range 4294967296
! 493‿420≡8⊸ParseInt¨ "0755"‿"644"
! "755"‿"644"≡8⊸FmtInt¨ 493‿420
! ∧´"10"⊸≡¨ FmtInt˜¨ 2‿5‿8‿10
! 1=Tr 1.8
! ¯1=Tr ¯1.6
! 8‿1≡25 QuotRem 3
! 3‿0≡21 QuotRem 7
! ¯1‿¯2≡¯5 QuotRem 3
! 2‿5‿12‿23≡∞‿24‿60‿60 ToMixedRadix 191543
! (-2‿5‿12‿23)≡∞‿24‿60‿60 ToMixedRadix ¯191543
# string.bqn
⟨DropPrefix⟩ ← •Import "string.bqn"
! "o"≡"fo" DropPrefix "foo"
! ∧´"lol"‿""‿"bogus"‿"foobar"‿"b"‿"o"‿"oo"‿"Foo"‿"fOo" (⊢≡DropPrefix)¨ <"foo"
|
